Takenori HidaAssociate Professor

■Researcher basic information

Organization

  • College of Engineering Department of Urban and Civil Engineering
  • Graduate School of Science and Engineering（Master's Program） Major in Urban and Civil Engineering
  • Graduate School of Science and Engineerin（Doctoral Program） Major in Society's Infrastructure Systems Science
  • Faculty of Applied Science and Engineering Domain of Urban and Civil Engineering

Research Areas

  • Social infrastructure (civil Engineering, architecture, disaster prevention), Building structures and materials, Earthquake
  • Social infrastructure (civil Engineering, architecture, disaster prevention), Disaster prevention engineering, Human Behavior during Earthquake
  • Social infrastructure (civil Engineering, architecture, disaster prevention), Structural and seismic engineering, Structural Health Monitoring

Research Keyword

  • Artificial Intelligence
  • Disaster Prevention
  • Resilience
  • Human Behavior during Earthquake
  • Structural Health Monitoring

Degree

  • 2020年03月　博士（工学）（京都大学）
  • 2005年03月　修士（工学）（千葉大学）

Educational Background

  • Apr. 2007 - Mar. 2010, Kyoto University, Graduate School of Engineering, Department of Environmental Engineering
  • Apr. 2003 - Mar. 2005, Chiba University, 大学院自然科学研究科, 建築専攻
  • Apr. 1999 - Mar. 2003, Shinshu University, Faculty of Engineering, 社会開発工学科

Career

  • Nov. 2014 - Mar. 2021, The University of Tokyo, The Graduate School of Engineering Department of Architecture, Assistant Professor
  • Apr. 2011 - Oct. 2014, Tokyo University of Science, Faculty of Science and Technology, Department of Architecture, Assistant Professor
  • Apr. 2011 - Oct. 2014, Tokyo University of Science, Faculty of Science and Technology, Assistant Professor
  • Apr. 2010 - Mar. 2011, Disaster Prevention Research Institute, 地震災害研究部門構造物震害研究分野, 任期付き研究員
  • Apr. 2005 - Mar. 2007, Ministry of Land, Infrastructure, Transport and Tourism, 営繕部, 一般職員

■Research activity information

Award

  • Sep. 2015, Architectural Institute of Japan Encouragement Prize, 東日本大震災後の超高層集合住宅のアンケート調査による室内被害と強震記録との関係から推定される建物応答, Architectural Institute of Japan
    肥田剛典
    Japan society
  • Dec. 2013, 2013年日本地震工学会大会優秀論文発表賞, 部分空間法を用いた建物の固有振動数と減衰定数の同定精度に関する基礎的検討, Japan Association of Earthquake Engineering
    肥田剛典
    Japan society
  • Dec. 2012, 2012年日本地震工学会大会優秀論文発表賞, 2011年東北地方太平洋沖地震におけるRC造超高層集合住宅の室内被害, Japan Association of Earthquake Engineering
    肥田剛典
    Japan society

Paper

  • ESTIMATION OF SOURCE PARAMETERS, LOCAL ATTENUATION STRUCTURE, AND SITE EFFECTS USING TWO-STEP SPECTRAL INVERSION METHOD
    IMAZEKI Suguru; TAKADA Tsuyoshi; ITOI Tatsuya; HIDA Takenori, It is important in the spectral inversion analysis to take into account the local inhomogeneity of the attenuation structure. In this paper, we present a two-step spectral inversion method based on a Bayesian model to estimate source parameters, local attenuation structure, and site effects from observation records. It is expected that the introduction of a Bayesian model allows us to estimate appropriate solutions even for a small number of observation records and to evaluate local attenuation structure. The applicability of the proposed method is discussed through an experiment using actual observation records and numerical estimates., Architectural Institute of Japan
    Journal of Structural and Construction Engineering (Transactions of AIJ), 01 May 2022
  • FUNDAMENTAL STUDY ON DEVELOPMENT OF SEISMIC RESPONSE ANALYSIS MODEL OF HUMAN BODIES CONSIDERING INDIVIDUAL DIFFERENCES
    MATSUMOTO Yuma; HIDA Takenori; TAKADA Tsuyoshi; ITOI Tatsuya, The consideration of indoor safety during severe earthquake is necessary to minimize casualties in buildings. Most human casualties occur as injuries, such as bruises caused by overturning of furniture. However, injuries from the seismic response of humans, for example, being knocked down by earthquake shaking or the head collision to the wall, also could occur. It is important to consider the human response to the earthquake motions for the evaluation of indoor earthquake safety.

    Several studies have been conducted on human seismic response, and the seismic response analysis model of human bodies was developed based on the shaking table test which input earthquake motions to human subjects. However, the individual differences in human seismic response have not been studied so far. When investigations on human damages under severe earthquake shaking are conducted, person-to-person differences are considered critical.

    The purpose of this study was to identify the individual differences of human seismic response, and to develop the seismic response analysis model of human bodies which can consider the difference. For that purpose, first, a difference in human seismic response was investigated by comparing the shaking table test results of two human subjects. The comparison results showed that there is a difference between two subjects’ seismic response in the existence of residual displacement and the coping strategy to the shaking.

    Then, a novel feedback control method of the seismic response analysis model of human bodies was proposed where a time dependent reference value of the control system was adopted. Then the proposed model succeeded to reproduce the person-to-person difference between two subjects. In addition, response analyses of human bodies were conducted with the developed model inputting various strong motion records. The response analysis results showed that the characteristics of the differences in seismic response between subjects in the shaking table test were also shown in the results of the response analysis, and they vary depending on the frequency characteristics of the input earthquake motion., Architectural Institute of Japan
    Journal of Structural and Construction Engineering (Transactions of AIJ), 30 Aug. 2021
  • EVALUATION OF HUMAN RESPONSES TOWARD INJURY PREDICTION IN SUPER HIGH-RISE RESIDENTIAL BUILDINGS EXCITED BY PULSE-LIKE GROUND MOTIONS
    Hiroki KARATSU; Takenori HIDA and Masayuki NAGANO, Corresponding, When a large pulse-like ground motion strikes in urban areas, significant structural damages may occur to super-high-rise residential buildings along with human injuries or fatalities. Herein, to evaluate human injury, human responses were investigated in super-high-rise residential buildings using the Ricker wavelet as the pulse-like ground motion. Using nonlinear seismic response analysis models of super-high-rise RC buildings and those of the human body, the variation in the maximum displacement of the center of pressure (CoP) and head velocity was examined based on the predominant periods and amplitude level of the input seismic waves., Architectural Institute of Japan
    J. Struct. Constr. Eng., 01 Jul. 2021, [Reviewed]
  • 深層学習による自然災害時の即時建物被害評価 (特集 危機管理におけるAIの活用)
    肥田 剛典, 日本危機管理防災学会
    危機管理防災研究 = Emergency management studies : 日本危機管理防災学会誌, 28 Feb. 2021, [Reviewed]
  • EVALUATION OF INJURY IN SUPER HIGH-RISE BUILDING DURING EARTHQUAKE BASED ON NONLINEAR SEISMIC RESPONSE ANALYSIS MODEL OF HUMAN BODY
    肥田 剛典; 唐津 啓樹; 永野 正行; 糸井 達哉; 高田 毅士, 日本建築学会
    日本建築学会構造系論文集, Oct. 2020, [Reviewed]
  • 地震時における人間の負傷を含む室内被害軽減のための免震建物設計法の提案 (研究助成事業 2019年度(第11回)免震構造・制振構造に関わる研究助成の成果報告)
    肥田 剛典, 日本免震構造協会
    Menshin, Jul. 2020, [Reviewed]
  • 第2代会長 岡田恒男(Tsuneo Okada) (特集 歴代会長にきく : 平成の地震災害と令和への展望)
    岡田 恒男; 小穴 温子; 永野 正行; 肥田 剛典, 日本地震工学会
    日本地震工学会誌 = Bulletin of JAEE, Feb. 2020, [Reviewed]
  • EVALUATION OF INJURY IN SUPER HIGH-RISE BUILDING DURING EARTHQUAKE BASED ON NONLINEAR SEISMIC RESPONSE ANALYSIS MODEL OF HUMAN BODY
    肥田 剛典; 唐津 啓樹; 永野 正行; 糸井 達哉; 高田 毅士,

     In this study, the nonlinear seismic response analysis model of a human body was developed using shaking table tests. Next, the relationship between human's displacement of the center of pressure (CoP) and the action difficulty during earthquake was evaluated based on the human model and questionnaire survey for residents of the super high-rise residential buildings. Furthermore, several aspects of human behavior in an RC super high-rise building were investigated based on the results of the seismic response analysis of the building. Finally, a method was proposed to evaluate human injuries in a super high-rise building during an earthquake.

     Based on the results, the following conclusions were obtained.

     1) We proposed a simple method to evaluate the action difficulty from the maximum displacement of the CoP calculated by the seismic response analysis model of the human body.

     2) Based on the results of the analysis employed using the seismic response analysis model of an RC super high-rise building, it was shown that there is a good correlation between the maximum absolute velocity of the floor response of the building and the human response.

     3) The study proposed a simple evaluation method to obtain the maximum relative displacement of the CoP with respect to the floor, maximum displacement and velocity of the human head from the maximum absolute velocity of the floor response during an earthquake.

     4) A higher floor has a higher maximum absolute velocity of the floor response. Thus, the potential for incurring human injuries increases with greater proximity to the higher floor.

     5) Even if the maximum story drift angle of the building does not exceed the design criterion of 1/100, humans can suffer injury, such as from collisions with obstacles or from falling.

     Further studies are required to evaluate the variation in human behavior due to individual differences, as well as to examine the validity of the analytical result of the human model when extreme shaking is provided as input to the model.

    , 日本建築学会
    日本建築学会構造系論文集, 2020, [Reviewed]
  • 人体の地震応答解析モデルに基づく被震下人間負傷評価法の構築
    伊東 一輝; 肥田 剛典; 糸井 達哉; 高田 毅士,

     The current seismic design mainly focuses on the performance of structure. The human safety to earthquake shaking is considered implicitly by securing the structural performance. There exists some cases, however, of human injury due to earthquake shaking due to falling or bumping into the wall during past earthquakes. In order to ensure human safety during earthquakes, this study proposed an evaluation methodology of human behavior.

     First, the relationship between human injury and floor response during earthquake is developed using a seismic analysis model of human body proposed by our previous study. The maximum displacement of center of pressure (CoP) of human body is evaluated using the human body model to estimate the possibility of falling and hitting to the wall. Furthermore, head injury criterion (HIC) score during strong shaking is evaluated as a function of the maximum velocity of head. Then, the evaluation methodology of degree of head injury and displacement of CoP based on peak floor acceleration (PFA) and representative frequency are proposed.

     Then, in order to investigate the difficulty of action during earthquake shaking, the results of interview survey are shown that were conducted to the operators of the Kashiwazaki-Kariwa Nuclear Power Station to collect their experiences during the 2007 Niigataken Chuetsu-oki Earthquake. The CoPs evaluated by the above-mentioned methodology based on the strong motion records observed at the plant during the earthquake are shown to be comparable to the experiences of the operators, i.e., as the displacement of CoP increases, the human action is more difficult. This fact shows that the evaluation methodology of CoP can be used to evaluate the action difficulty of human during strong shaking.

     Then, the methodology to evaluate possibility of human injury is demonstrated combining the proposed method and estimation of the overturning ratio of furniture. A result from an example case indicates that, tall furniture overturns in smaller PFA than that of human injury, if the frequency is higher than 1.0 [Hz]. Whereas if the frequency is lower than 1.0 [Hz], PFA for overturning of tall furniture is almost equivalent to that of human injury.

     Finally, seismic design framework for building that focuses on human injuries during earthquakes was proposed. It is demonstrated that integrated evaluation of possibility of injury due to falling down on the floor, bumping into the wall, and overturning of the furniture as well as action difficulty due to shaking can be conducted using the proposed method to discuss the design criteria of the building for securing human safety.

    , 日本建築学会
    日本建築学会構造系論文集, Jan. 2020, [Reviewed]
  • 広域地震災害における構造物群性能監視 拡張相関異常検知の適用性評価
    八百山 太郎; 肥田 剛典; 高田 毅士,

     In large-scale earthquake disasters, urban monitoring system would be effective in decision-making for emergency responses. For this purpose, we have proposed a data-driven technique for portfolio-monitoring of structures that adopts a machine-learning method called Correlation Anomaly Detection (CAD). This technique detects damaged structures in a portfolio by detecting a change in correlation property between dynamic characteristics of different structures. The key features of our proposed technique are summarized as follows.

     (i) The methodology can be categorized into data-driven techniques which require no priori information about the physical properties of systems, and therefore has versatility in terms of applied objectives.

     (ii) In the context of structural health monitoring (SHM), the methodology can be categorized into output-only techniques, which do not use input ground accelerations. This advantage allows its easy and cost-efficient implementation.

     (iii) Most of output-only SHM methodologies adopt assumptions on the characteristics of excitations or mode shapes of vibrations. Our proposed technique, however, does not make such assumptions and thus has applicability even to strong motion observations.

     The paper presents an improvement of CAD as Extended Correlation Anomaly Detection (ECAD), which utilizes the frequency content of time-series data, and examines its applicability to portfolio-monitoring of structures even in the case of different ground motions input to structures.

     We first show the summary of CAD and then formulates the ECAD algorithm, which could utilize the frequency content of time series. In ECAD, the covariance structure corresponding to each discretized frequency is modelled as a co-spectrum matrices among time-series data, in order to capture correlation anomalies in the frequency domain. The series of anomaly scores computed by CAD for different discretized freqeuncies is defined as correlation anomaly spectrum, whose integration gives anomaly score for each monitored objective.

     Second, we examine the applicability of CAD and ECAD to portfolio-monitoring of structures by numerical experiments. The portfolio is modelled by SDOF oscillators to which ground accelerations on different observation stations are input. The experiment shows (i) the good applicability of ECAD and its superiority to CAD even in the case of different excitations to structures, and (ii) the ability of ECAD to capture changes of natural frequencies.

     Finally, we demonstrate ECAD by using actual strong motion observations. The aim is to detect structural damages resulted from the main shock of The 2011 off the Pacific coast of Tohoku Earthquake. The demonstration reveals the following: (i) ECAD has the applicability even to actual structures; (ii) ECAD tends to underestimate structural damage of structures whose response is a wide-band or multi-modal process; (iii) ECAD tends to overestimate structural damage when a structure shows different vibration modes between in reference and test data.

    , 日本建築学会
    日本建築学会構造系論文集, Jan. 2020, [Reviewed]
  • 21549 広域構造物群性能監視に対する拡張相関異常検知の適用性
    八百山 太郎; 肥田 剛典; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2019, [Reviewed]
  • 21474 超高層RC造建物の非線形特性のばらつきを考慮した地震応答性状
    徳永 大地; 日野浦 雄高; 肥田 剛典; 田沼 毅彦; 小田 聡; 王 欣; 永野 正行, 日本建築学会
    構造II, 20 Jul. 2019, [Reviewed]
  • 21242 地震動加速度フーリエ振幅スペクトルへの主成分分析の適用 スペクトルインバージョンを併用した地盤増幅特性評価の試み
    今関 俊; 八百山 太郎; 肥田 剛典; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2019, [Reviewed]
  • 21158 人体の地震応答解析モデルに基づく地震時負傷予測手法の構築 その2 人間の負傷を考慮した耐震設計に向けて
    伊東 一輝; 肥田 剛典; 糸井 達哉; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2019, [Reviewed]
  • 21157 人体の地震応答解析モデルに基づく地震時負傷予測手法の構築 その1 人間の地震時頭部負傷スペクトルの提案
    肥田 剛典; 大野 敦史; 伊東 一輝; 糸井 達哉; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2019, [Reviewed]
  • 20027 閉形リスク曲線に基づく地震減災設計規範の提案
    連 惇; 肥田 剛典; 糸井 達哉; 高田 毅士, 日本建築学会
    構造I, 20 Jul. 2019, [Reviewed]
  • 2050 二重倒立振子による人体の地震応答解析モデルの構築と地震時負傷予測法の提案
    肥田 剛典; 大野 敦史; 糸井 達哉; 高田 毅士, 日本建築学会
    日本建築学会関東支部研究報告集, Mar. 2019, [Reviewed]
  • DEVELOPMENT OF SEISMIC RESPONSE ANALYSIS MODEL OF HUMAN BODY BY CART-TYPE DOUBLE INVERTED PENDULUM MODEL FOR PREDICTION OF HUMAN INJURY DURING EARTHQUAKE
    HIDA Takenori; OHNO Atsushi; ITOI Tatsuya; TAKADA Tsuyoshi,

     Humans need to take various actions during and after earthquake. Prediction of human injury due to hitting to wall or falling due to shaking is considered to be important to develop strategies for prevention of human injury. Seismic analysis model of human body is useful to predict the human injury during an earthquake. In the previous study, we had developed the seismic response analysis model of human body based on shaking table test with human subject. The model was constructed by cart-type single inverted pendulum. The relative displacement between shaking table and the center of pressure (CoP) of human evaluated by the model agreed well with that of the human subject. However, the relative velocity between shaking table and head of human evaluated by the model was underestimated. This was because the model was constructed by single inverted pendulum.

     In this study, we constructed the seismic response analysis model of human body by cart-type double inverted pendulum model to overcome the problem of single inverted pendulum. Two types of model were considered; the double inverted pendulum without feedback control of hip (Type I), and that with feedback control of hip (Type II). Bending of the hip of the human subject during shaking table test is considered important to improve accuracy of the model. Type II could reproduce the bending posture, while Type I could not. Thus, the relative displacement and relative velocity of head of Type II agreed well with the motion of human subject during shaking table tests.

     Finally, the validity of the model was confirmed by the simulation analysis with other input motions. The maximum displacement of CoP and head and relative velocity of head could be well reproduced by using Type II model.

    , Architectural Institute of Japan
    Journal of Structural and Construction Engineering (Transactions of AIJ), 2019, [Reviewed]
  • 地震時人的被害予測に向けた人体の地震応答解析モデルの構築 振動台搭乗実験に基づく台車型倒立振子モデルによるシミュレーション解析
    肥田 剛典; 大野 敦史; 糸井 達哉; 高田 毅士,  So many human damages have been reported during past earthquake. Some of them got injured due to falling and crashing to furniture. Critical structures such as chemical plants and nuclear power plants, it is required to take countermeasures after accidents to prevent harmful substance leakage in the event of a severe accident caused by an earthquake. However, if the workers are injured during earthquake, the retrieval activities might become difficult for the workers. In addition, in order to predict the indoor human damage due to huge earthquake such as the Nankai Trough earthquake, it is important to grasp the behavior of human during an earthquake. To predict injuries resulting from human falling and crashing to furniture due to earthquake shaking, it is necessary to evaluate the seismic response of the human body.
     From the view point of the above background, in order to construct a seismic response analytical model of a human body, we conducted shaking table tests with human subject. The seismic response characteristics of the human body during shaking were investigated. The behavior of human subject during excitation was observed by 3-D motion capture system. The center of pressure (CoP) on the floor of the human subject was measured by a force plate during the excitation. Then, the mechanisms of postural control of the human subject were investigated. The human subject controlled his posture by moving the CoP to place the center of gravity (CoG) within the base of support (BoS). When CoG deviates from BoS, the human subject controlled his posture by widening BoS through the stepping strategy.
     Next, the seismic response analytical model in the forward-backward direction (sagittal plane direction) of a human was constructed based on the cart-type single-link inverted pendulum model with state feedback controller. The displacement of CoP, CoG, velocity of CoG and head could be evaluated by the model. The frequency response function of human subject during excitation in the experiment and that of the analytical model were compared in order to set the appropriate feedback gain of the controller. The displacement of CoP, CoG, velocity of CoG and head evaluated by the analytical model showed good agreement with those of the experimental results.
     Finally, the validity of the model was verified by the simulation analysis with other input motion. The maximum displacement of CoP and CoG could be well reproduced. On the other hand, the velocity of CoG was slightly overestimated compared to the experimental result, and the velocity of the head was slightly underestimated compared with the experimental result. Improvement of accuracy of the seismic response model (e.g. modeling with double inverted pendulum or using other control methods, etc.) is a future task., 日本建築学会
    日本建築学会構造系論文集, Jan. 2019, [Reviewed]
  • 21287 2007年新潟県中越沖地震時における柏崎刈羽原子力発電所運転員のイン>タビュー調査に基づく行動阻害要因に関する分析
    伊東 一輝; 肥田 剛典; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2018, [Reviewed]
  • 21283 振動台搭乗実験に基づく人体の地震応答解析モデルの構築 その2 人体の地震応答解析モデル
    肥田 剛典; 大野 敦史; 糸井 達哉; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2018, [Reviewed]
  • 21282 振動台搭乗実験に基づく人体の地震応答解析モデルの構築 その1 人体挙動の再現性と床反力中心との関係性の考察
    大野 敦史; 肥田 剛典; 糸井 達哉; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2018, [Reviewed]
  • 21065 相関異常検知に基づく建物群相互監視技術の構築に向けた建物群構成要件に関する考察
    八百山 太郎; 肥田 剛典; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2018, [Reviewed]
  • 20137 二次元確率場の単点波形と空間平均化波形の特性の比較
    山田 健太郎; 肥田 剛典; 高田 毅士, 日本建築学会
    構造I, 20 Jul. 2018, [Reviewed]
  • 20041 壊滅指標を用いた地域減災最適化戦略構築に向けた予備的検討
    伊木 さとみ; 肥田 剛典; 高田 毅士, 日本建築学会
    構造I, 20 Jul. 2018, [Reviewed]
  • 超高層集合住宅を対象とした振動解析モデルの統計的分析と各種入力地震動に対する非線形応答特性および動特性評価
    北堀 隆司; 永野 正行; 田沼 毅彦; 小田 聡; 日野浦 雄高; 金子 知宣; 肥田 剛典; 鈴木 賢人, 日本建築学会
    日本建築学会技術報告集, Jun. 2018, [Reviewed]
  • （31） 時間領域および周波数領域のシステム同定法に基づく建物の地震時動特性評価 －ARXモデルおよび部分空間法，CMIF法の同定精度の比較
    肥田 剛典; 飯山 かほり; 中村 尚弘, 日本建築学会
    構造工学論文集．Ｂ, 25 Mar. 2018, [Reviewed]
  • 畳み込みニューラルネットワークによる建築物の被災度判定
    肥田 剛典; 八百山 太郎; 高田 毅士,

    2016 年熊本地震において，多くの建物被害が発生した．地震等の自然災害発生後に迅速な復旧活動を行うためには，可及的速やかに被災地の被害状況や分布を把握することが不可欠である．本研究では，深層学習の手法の一つである畳み込みニューラルネットワークを用いて，建物の外観の画像データから被害の有無を判定する手法について検討する．さらに，CNN による被害判定結果を地図上に表示し，被害の地理的分布を把握する手法を構築する．

    , 一般社団法人 人工知能学会
    人工知能学会全国大会論文集, 2018, [Reviewed]
  • 超高層集合住宅を対象とした振動解析モデルの統計的分析と各種入力地震動に対する非線形応答特性および動特性評価
    北堀 隆司; 永野 正行; 田沼 毅彦; 小田 聡; 日野浦 雄高; 金子 知宣; 肥田 剛典; 鈴木 賢人,

    Database on the structural characteristics of super high-rise residential buildings are constructed based on documents for the 77 buildings used in the structural design. The masses, linear and nonlinear springs are statistically compiled in terms of normalized height-wise distribution using vibration analysis models for the 39 super high-rise RC buildings. Nonlinear earthquake responses of these buildings are evaluated using several input motions used in the structural design. Equivalent natural periods are found to increase 1.8 times from the initial condition for the level-2 excitation.

    , 日本建築学会
    日本建築学会技術報告集, 2018, [Reviewed]
  • 23345 超高層RC造建物データベースを用いた非線形応答解析による建物周期特性の検討 その2 告示波による建物の周期特性評価
    北堀 隆司; 金子 知宣; 田沼 毅彦; 小田 聡; 時本 和則; 日野浦 雄高; 鈴木 賢人; 肥田 剛典; 永野 正行, 日本建築学会
    構造IV, 20 Jul. 2017, [Reviewed]
  • 23344 超高層RC造建物データベースを用いた非線形応答解析による建物周期特性の検討 その1 既往波による建物の周期特性評価
    金子 知宣; 北堀 隆司; 田沼 毅彦; 小田 聡; 時本 和則; 日野浦 雄高; 鈴木 賢人; 肥田 剛典; 永野 正行, 日本建築学会
    構造IV, 20 Jul. 2017, [Reviewed]
  • 21542 相関異常検出に基づく建物群相互モニタリングの適用性に関する検討
    八百山 太郎; 肥田 剛典; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2017, [Reviewed]
  • 21531 超高層集合住宅の居住者に対するアンケート調査結果に基づくニューラルネットワークによる最大床応答の推定
    渡辺 眞伍; 肥田 剛典; 鈴木 賢人; 永野 正行, 日本建築学会
    構造II, 20 Jul. 2017, [Reviewed]
  • 21257 近年の知見に基づく建築物の減衰と固有周期に関する検討 その4 RC系建物の経年変化の分析（SRC造高層建物）
    飯山 かほり; 肥田 剛典; 鹿嶋 俊英; 中村 尚弘; 佐武 直紀, 日本建築学会
    構造II, 20 Jul. 2017, [Reviewed]
  • 21245 地震工学から見た震災関連死の現状と課題
    伊木 さとみ; 肥田 剛典; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2017, [Reviewed]
  • 21209 ディープラーニングによる地震時建物被害判定と被害の地理的分布推定手法
    肥田 剛典; 八百山 太郎; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2017, [Reviewed]
  • 21205 振動台搭乗実験に基づく人体の地震応答解析モデル構築に向けた基礎的検討 ZMPと姿勢保持方略の関係の分析
    大野 敦史; 割田 聖洋; 肥田 剛典; 糸井 達哉; 高田 毅士, 日本建築学会
    構造II, 20 Jul. 2017, [Reviewed]
  • 21181 地震動の空間変動を考慮した基盤波の推定
    山田 健太郎; 肥田 剛典; 髙田 毅士, 日本建築学会
    構造II, 20 Jul. 2017, [Reviewed]
  • 21001 超高層集合住宅を対象とした長期微動計測による固有振動数の変化
    西野 剛史; 森下 真行; 肥田 剛典; 小田 聡; 田沼 毅彦; 鈴木 賢人; 永野 正行, 日本建築学会
    構造II, 20 Jul. 2017, [Reviewed]
  • 20044 動的PRAの簡易システムへの適用
    堀 友洋; 肥田 剛典; 高田 毅士, 日本建築学会
    構造I, 20 Jul. 2017, [Reviewed]
  • 20040 減災計画に向けた地域レジリエンスの時空間モデルの提案
    根本 毅; 肥田 剛典; 高田 毅士, 日本建築学会
    構造I, 20 Jul. 2017, [Reviewed]
  • 20003 地震に対する病院施設のレジリエンス性能の性能レベル・性能 マトリックスの提案
    大渕 正博; 恒川 裕史; 吉澤 睦博; 肥田 剛典; 糸井 達哉; 高田 毅士, 日本建築学会
    構造I, 20 Jul. 2017, [Reviewed]
  • 2087 微小ひずみの計測に基づく梁端損傷判定可能性に関する検討
    伊山 潤; 長谷川 隆; 倉田 真宏; 廣嶋 哲; 肥田 剛典, 日本建築学会
    日本建築学会関東支部研究報告集, 20 Feb. 2017, [Reviewed]
  • 2031 地震による連鎖的な災害を対象としたリスク低減の考え方
    伊木 さとみ; 高田 毅士; 肥田 剛典, 日本建築学会
    日本建築学会関東支部研究報告集, 20 Feb. 2017, [Reviewed]
  • 2014 空間変動を有する地震動を用いた基盤波の推定
    山田 健太郎; 肥田 剛典; 髙田 毅士, 日本建築学会
    日本建築学会関東支部研究報告集, 20 Feb. 2017, [Reviewed]
  • 2008 相関異常検出に基づく建物群相互モニタリングの提案
    八百山 太郎; 肥田 剛典; 高田 毅士, 日本建築学会
    日本建築学会関東支部研究報告集, 20 Feb. 2017, [Reviewed]
  • SRC造建物の動特性の経時変化に基づく動的モデルの同定
    飯山 かほり; 肥田 剛典; 鹿嶋 俊英; 中村 尚弘; 佐武 直紀,

    Secular change in equivalent stiffness and strength of a SRC-type building was examined by analyzing seismic records of a long-term seismic observation. Identifying the predominant frequencies and the corresponding deformations from the observed records, the detailed relationship between equivalent shear-force and deformation of the objective building can be obtained, which relationship includes useful information about the structural state of the building. Further, it is demonstrated the single degree-of-freedom model follows the regulation of the relationship can explain the dynamic performance of the building.

    , 日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」
    理論応用力学講演会 講演論文集, 2017, [Reviewed]
  • 建物の振動特性の同定法に関する比較検討
    肥田 剛典; 飯山 かほり; 中村 尚弘,

    This paper investigated the accuracy of the seismic response characteristics of building evaluated by the autoregressive exogenous model (ARX), the subspace state-space system identification method (4SID), and the complex mode indicator function method (CMIF). First, the accuracies of the natural frequency, the damping ratio, and the specific mode shape identified by the three methods were compared based on linear seismic response analysis. Then, the dynamic characteristics of the SRC building were identified by the abovementioned three methods using the strong motion records of the 2011 off the Pacific coast of Tohoku Earthquake and its aftershock. From the comparison of these identified results, the characteristics of these methods were estimated.

    , 日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」
    理論応用力学講演会 講演論文集, 2017, [Reviewed]
  • STUDY ON DYNAMIC CHARACTERISTICS OF SUPER HIGH-RISE RESIDENTIAL BUILDINGS BASED ON STRONG MOTION RECORDS AND AMBIENT VIBRATION AND VARIATION OF INTER-STORY STIFFNESS USING INTERMEDIATE FLOOR RECORDS
    成島 慶; 小田 聡; 永野 正行; 田沼 毅彦; 肥田 剛典; 上林 宏敏; 金子 知宣; 鹿嶋 俊英; 森清 宣貴; 保井 美敏, Variation of 1st natural frequency of super high-rise residential buildings were investigated by using strong motion records during the 2011 off the Pacific Coast of Tohoku earthquake and ambient vibration records. Non-linear characteristics of two SRC buildings were similar to other super high-rise residential buildings. Based on analysis using intermediate floor records, inter-story stiffness at the lower layer has decreased from the increase of modal amplitude ratio of the middle floor to the top floor. Possibility for height-wise damage estimation is presented by performing microtremor measurements at plural floors., 日本建築学会
    日本建築学会技術報告集, 2017, [Reviewed]
  • 超高層RC造建物データベースに基づく設計用振動解析モデルと地震応答特性に関する研究 その3 非線形応答解析結果に基づく建物の周期特性評価
    北堀 隆司; 西野 剛史; 成島 慶; 肥田 剛典; 永野 正行; 鈴木 賢人; 田沼 毅彦; 小田 聡; 時本 和則, 日本建築学会
    構造IV, 24 Aug. 2016, [Reviewed]
  • 超高層RC造建物データベースに基づく設計用振動解析モデルと地震応答特性に関する研究 その2 設計用振動解析モデルの高さ方向分布と地震応答特性の分析
    西野 剛史; 北堀 隆司; 成島 慶; 田沼 毅彦; 小田 聡; 肥田 剛典; 鈴木 賢人; 永野 正行, 日本建築学会
    構造IV, 24 Aug. 2016, [Reviewed]
  • 超高層RC造建物データベースに基づく設計用振動解析モデルと地震応答特性に関する研究 その1 建物の基本情報と構造特性の分析
    金子 知宣; 西野 剛史; 北堀 隆司; 田沼 毅彦; 成島 慶; 鈴木 賢人; 肥田 剛典; 永野 正行; 小田 聡, 日本建築学会
    構造IV, 24 Aug. 2016, [Reviewed]
  • 空間変動を有する地震動を用いた基盤波の推定
    山田 健太郎; 肥田 剛典; 高田 毅士, 日本建築学会
    構造II, 24 Aug. 2016, [Reviewed]
  • 超高層建物の2点強震観測記録に基づく層剛性の高さ分布推定手法に関する実証的研究
    李 尚元; 肥田 剛典; 田沼 毅彦; 小田 聡; 永野 正行; 高田 毅士, 日本建築学会
    構造II, 24 Aug. 2016, [Reviewed]
  • 常時微動測定に基づくRC造偏心建物の耐震性能診断
    日向 仁; 肥田 剛典; 高田 毅士, 日本建築学会
    構造II, 24 Aug. 2016, [Reviewed]
  • 震度曝露人口曲面を用いた地震防災対策における効率的なハード・ソフト対策の組み合わせの基礎的検討
    松原 稔; 肥田 剛典; 糸井 達哉; 高田 毅士, 日本建築学会
    構造II, 24 Aug. 2016, [Reviewed]
  • 地震体験実験に基づく人体の地震応答解析モデルの構築に向けた基礎的検討 その2 人体の時変応答特性
    割田 聖洋; 肥田 剛典; 糸井 達哉; 高田 毅士, 日本建築学会
    構造II, 24 Aug. 2016, [Reviewed]
  • 地震体験実験に基づく人体の地震応答解析モデルの構築に向けた基礎的検討 その1 実験概要
    肥田 剛典; 割田 聖洋; 糸井 達哉; 高田 毅士, 日本建築学会
    構造II, 24 Aug. 2016, [Reviewed]
  • 振動台搭乗実験に基づく超高層集合住宅居住者の地震時の体感に関する検討 その4 姿勢の違いによる体感と人間頭部の応答の比較
    坂本 あいの; 鈴木 賢人; 金子 知宣; 田沼 毅彦; 小田 聡; 肥田 剛典; 永野 正行, 日本建築学会
    構造II, 24 Aug. 2016, [Reviewed]
  • 不確定曲げ柔性を有する静定梁の静的応答の変動波数特性
    八百山 太郎; 肥田 剛典; 高田 毅士, 日本建築学会
    構造I, 24 Aug. 2016, [Reviewed]
  • 自然災害を対象にした地域レジリエンスモデルの提案
    根本 毅; 肥田 剛典; 高田 毅士, 日本建築学会
    構造I, 24 Aug. 2016, [Reviewed]
  • 閉形リスク曲線を利用した建築群地震リスク評価 その1 建物応答の推定
    杜 凌子; 肥田 剛典; 高田 毅士, 日本建築学会
    構造I, 24 Aug. 2016, [Reviewed]
  • Replication of Seismic Response of High-Rise Residential Building During the 2011 Off the Pacific Coast of Tohoku Earthquake Based on Simulation Analyses Considering Dynamic Soil-Structure Interaction
    YAMAMOTO Takeshi; YASUI Mitoshi; NAGANO Masayuki; HIDA Takenori; TANUMA Takehiko, In this study, we try to replicate seismic responses of the R/C high-rise residential building, where the earthquake observation system has been activated for more than 15 years. During the 2011 off the pacific coast of Tohoku Earthquake, the seismic records were obtained simultaneously for the building and the surrounding soil, which enable us to evaluate the coupling dynamic behavior of the building, soil, and the piles. We adopted the Penzien-model for simulation analysis to evaluate the dynamic building-pile-soil interaction considering nonlinear behavior of both the building and the soil, which is validated by good agreement with recorded motions. Pile stresses during the Tohoku earthquake are estimated to approximate to crack level., JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING
    Journal of Japan Association for Earthquake Engineering, Jul. 2016, [Reviewed]
  • Elucidation of Dynamic Behavior of Super High-Rise Residential Buildings during Massive Earthquake and Activities for Mitigation of Seismic Damages in Future
    NAGANO Masayuki; HIDA Takenori; TANUMA Takehiko; NAKAMURA Mitsuru; IKAWA Nozomu; YASUI Mitoshi; SAKAI Shigeki; MORISHITA Tadayuki; KITAHORI Takashi; UEBAYASHI Hirotoshi, This paper summarizes our activities for elucidation of dynamic characteristics of super high-rise residential buildings during the 2011.3.11 Tohoku Earthquake and for mitigation of seismic damages during the future massive earthquakes. We organized the "Joint Study Group on Earthquake Observation Records in Super High-Rise Residential Buildings" after the 3.11 Earthquake, where we share information and the outcomes from the analyses of the recorded motions. In addition to that, we carried out questionnaire survey for residents, simulation analyses, mictrotremor measurements, shaking table tests, etc, toward comprehensive understanding of what happened during the 3.11 Earthquake. The obtained results will be available for mitigation of seismic damages during the future massive earthquakes. We must emphasize, last but not least, that strong motion observation in building is inevitable in terms not only of post-earthquake damage evaluation, but of services for residents in related with the life continuity planning., JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING
    Journal of Japan Association for Earthquake Engineering, Apr. 2016, [Reviewed]
  • Evaluation of the structural damage of high-rise reinforced concrete buildings using ambient vibrations recorded before and after damage
    Hirotoshi Uebayashi; Masayuki Nagano; Takenori Hida; Takehiko Tanuma; Mitoshi Yasui; Shigeki Sakai, Evaluation of the degrees of structural damage suffered by high-rise residential buildings after being subjected to strong ground motions is extremely important to the development of life continuity planning for building residents. However, these evaluations cannot be based on strong-motion records alone, because earthquake observation equipment is not installed in most such buildings in Japan. In this study, we propose simple equations for estimating the stiffness degradation rate and the peak inter-story drift ratio (PIDR) by using ambient vibration records instead of strong-motion records when high-rise RC buildings are subjected to a severe earthquake. More specifically, we propose one equation that relates the square root of the stiffness degradation rate, which is the ratio of natural frequencies at the maximum response to the preliminary tremor response (elastic state), in strong-motion records with the ratio of natural frequencies identified from ambient vibrations before and after damage was suffered. We also propose an equation that relates the PIDR with the stiffness degradation rate on the basis of the stiffness-degrading bilinear restoring force characteristic derived from the strong-motion records of 13 high-rise buildings for the 1995 Hyogoken-Nanbu Earthquake (Mw 6.9) and the 2011 Tohoku-Oki Earthquake (Mw 9.0). Copyright (c) 2015 John Wiley & Sons, Ltd., WILEY-BLACKWELL
    EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, Feb. 2016, [Reviewed]
  • 設計用地震応答解析モデルに基づく超高層RC造建物における最大層間変形角の高さ分布
    山根 義康; 永野 正行; 肥田 剛典; 田沼 毅彦, This report describes height-wise distribution of maximum interstory drift angles in super high-rise RC buildings based on earthquake response analysis models for structural design. Yielding loads in the restoring force characteristics are almost consistent for plural buildings when normalized by base shear coefficients. The height-wise distributions of interstory drift angles mainly depends on characteristics of input wave motions. As a result of the response analyses using various pulse waves and harmonic waves, the maximum interstory drift angles in low level floors occur when predominant period of input wave is longer than first natural period of the building., 日本建築学会
    日本建築学会技術報告集, Feb. 2016, [Reviewed]
  • Evaluation of Dynamic Properties for the Super High-Rise RC Building Based on 3-D frame Analysis
    MORISHITA Tadayuki; SAITO Yoshihito; RYUJIN Hiroaki; NAGANO Masayuki; HIDA Takenori; TANUMA Takehiko; WATANABE Kazuhiro, Strong motion records during the 2011 off the Pacific coast of Tohoku earthquake were obtained at high-rise RC buildings in the Tokyo metropolitan area. This paper presents the evaluation of dynamic properties of a high-rise RC building based on 3-D frame analysis. From these studies, the following results were obtained. (1) Relationship between the relative displacement and temporal variation of the natural frequency based on 3-D analysis was consistent with the earthquake observation records. (2) The height-wise distribution of story drift angle was dependent on the levels of the input earthquake motion and showed different characteristics for the pulse type input motions. (3) For the larger input motion where the structural responses exceed far beyond the experienced responding levels, maximum response is not largely affected by whether it experienced seismic responses before or not., JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING
    Journal of Japan Association for Earthquake Engineering, Jan. 2016, [Reviewed]
  • Elucidation of Dynamic Behavior of Super High-Rise Residential Buildings during Massive Earthquake and Activities for Mitigation of Seismic Damages in Future
    NAGANO Masayuki; HIDA Takenori; TANUMA Takehiko; NAKAMURA Mitsuru; IKAWA Nozomu; YASUI Mitoshi; SAKAI Shigeki; MORISHITA Tadayuki; KITAHORI Takashi; UEBAYASHI Hirotoshi, This paper summarizes our activities for elucidation of dynamic characteristics of super high-rise residential buildings during the 2011.3.11 Tohoku Earthquake and for mitigation of seismic damages during the future massive earthquakes. We organized the "Joint Study Group on Earthquake Observation Records in Super High-Rise Residential Buildings" after the 3.11 Earthquake, where we share information and the outcomes from the analyses of the recorded motions. In addition to that, we carried out questionnaire survey for residents, simulation analyses, mictrotremor measurements, shaking table tests, etc, toward comprehensive understanding of what happened during the 3.11 Earthquake. The obtained results will be available for mitigation of seismic damages during the future massive earthquakes. We must emphasize, last but not least, that strong motion observation in building is inevitable in terms not only of post-earthquake damage evaluation, but of services for residents in related with the life continuity planning., JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING
    Journal of Japan Association for Earthquake Engineering, 2016, [Reviewed]
  • HEIGHT-WISE DISTRIBUTION OF MAXIMUM INTERSTORY DRIFT ANGLES IN SUPER HIGH-RISE RC BUILDINGS BASED ON EARTHQUAKE RESPONSE ANALYSIS MODELS FOR STRUCTURAL DESIGN
    YAMANE Yoshiyasu; NAGANO Masayuki; HIDA Takenori; TANUMA Takehiko, This report describes height-wise distribution of maximum interstory drift angles in super high-rise RC buildings based on earthquake response analysis models for structural design. Yielding loads in the restoring force characteristics are almost consistent for plural buildings when normalized by base shear coefficients. The height-wise distributions of interstory drift angles mainly depends on characteristics of input wave motions. As a result of the response analyses using various pulse waves and harmonic waves, the maximum interstory drift angles in low level floors occur when predominant period of input wave is longer than first natural period of the building., Architectural Institute of Japan
    AIJ Journal of Technology and Design, 2016, [Reviewed]
  • 21524 アンケート調査と強震記録に基づく超高層集合住宅居住者の揺れの体感と建物応答の推定式の提案(被害予測・推定(2),構造II,学術講演会・建築デザイン発表会)
    肥田 剛典; 永野 正行, 日本建築学会
    構造II, 04 Sep. 2015, [Reviewed]
  • 21516 ベイジアンネットワークを用いた地震被災建物の即時被害推定(被害予測・推定(1),構造II,学術講演会・建築デザイン発表会)
    鵜川 壮; 糸井 達哉; 高田 毅士; 肥田 剛典, 日本建築学会
    構造II, 04 Sep. 2015, [Reviewed]
  • 21179 2011年東北地方太平洋沖地震を経験した超高層集合住宅の動特性と層剛性の変化に関する研究(応答特性とその評価(10),構造II,学術講演会・建築デザイン発表会)
    成島 慶; 永野 正行; 肥田 剛典; 田沼 毅彦; 鹿嶋 俊英; 小豆畑 達哉; 井川 望; 保井 美敏, 日本建築学会
    構造II, 04 Sep. 2015, [Reviewed]
  • 21092 クリギング法による地震波空間補間法の精度向上のための地点補正スペクトルに関する考察(伝播・サイト特性,構造II,学術講演会・建築デザイン発表会)
    山田 優; 高田 毅士; 肥田 剛典, 日本建築学会
    構造II, 04 Sep. 2015, [Reviewed]
  • 22193 2階建て木造軸組構法住宅の耐震性能に関する実験的検討 : その2 振動台実験による試験体の耐力評価(荷重・応答予測法,構造III,学術講演会・建築デザイン発表会)
    小宮山 征義; 涌井 栄治; 渡邊 藤一郎; 佐藤 利昭; 肥田 剛典; 真崎 雄一; 井口 道雄; 永野 正行, 日本建築学会
    構造III, 04 Sep. 2015, [Reviewed]
  • 22192 2階建て木造軸組構法住宅の耐震性能に関する実験的検討 : その1 静的載荷実験による耐力要素の性能評価(荷重・応答予測法,構造III,学術講演会・建築デザイン発表会)
    涌井 栄治; 小宮山 征義; 渡邊 藤一郎; 佐藤 利昭; 肥田 剛典; 真崎 雄一; 井口 道雄; 永野 正行, 日本建築学会
    構造III, 04 Sep. 2015, [Reviewed]
  • 東日本大震災後の超高層集合住宅のアンケート調査による室内被害と強震記録との関係から推定される建物応答(2015年日本建築学会奨励賞)
    肥田 剛典, 日本建築学会
    建築雑誌, 20 Aug. 2015, [Reviewed]
  • 隣接する2棟の超高層集合住宅を対象としたアンケート調査と応答解析に基づく東日本大震災時における室内被害の推定
    坂本 あいの; 肥田 剛典; 山根 義康; 岩岡 竜夫; 永野 正行, 東京都中央区に建つ隣接した2棟の超高層集合住宅を対象に、居住者に対する室内被害に関するアンケート調査と建物の非線形時刻歴応答解析を行い、両建物で室内被害の差異が生じた要因を検討した。2011年東北地方太平洋沖地震（Mw9.0）時では、両建物で建物居住者の行動難度や最大床応答の差異は小さかったものの、壁紙の亀裂被害や層間変形に差異が見られた。時刻歴応答解析による応答にシステム同定手法を適用し固有振動数と減衰定数の経時変化を評価した。この結果、入力波の特性と両建物の固有周期や等価減衰の関係により室内被害等の差異が生じたことが分かった。, 公益社団法人 日本地震工学会
    日本地震工学会論文集, 2015, [Reviewed]
  • 粘弾性制振装置を付加した2層木造軸組架構のシミュレーション解析
    渡邊 藤一郎; 佐藤 利昭; 肥田 剛典; 井口 道雄; 真崎 雄一; 御子柴 正; 永野 正行, 本稿は、既報で提案した履歴モデルの多層架構への適用性を、2層木造軸組架構に対する振動台実験を通して検証した結果を示すものである。提案モデルは、制振装置の履歴特性を表すせん断型モデルで、実験時の柱脚の鉛直変位が小さいことを確認した上で、試験体の仕様に則したモデルを設定した。実験結果と解析結果の比較から、提案したモデルはBi - linear + Slipモデルに比して高い再現性を有することを示した。, 公益社団法人 日本地震工学会
    日本地震工学会論文集, 2015, [Reviewed]
  • Pile Stress Estimation Based on Seismic Deformation Method with Embedment Effects on Pile Caps
    Shuji Tamura; Takenori Hida, A pseudostatic analysis, based on the beam on nonlinear Winkler-spring method considering the seismic earth pressure and side friction acting on embedded pile caps, was developed to estimate pile bending moments and shear forces. To verify the proposed method's effectiveness, the authors conducted six dynamic centrifuge tests on a superstructure-footing model supported by 2x2 piles in sand deposits comprising a dry sand layer over liquefied soil. The seismic earth pressure, vertical wall friction at the active and passive sides, and friction at the sidewalls of the pile caps were separately measured by two-dimensional load cells during shaking. The seismic total earth thrust and side friction estimated by the proposed method showed good agreement with the experimental results for both the amplitude and phase difference to the superstructure and the pile cap inertia forces. The estimated bending moment and shear force in the piles also showed reasonable agreement with the experimental results; they were able to account for differences in the pile rigidity and soil relative density. (C) 2014 American Society of Civil Engineers., ASCE-AMER SOC CIVIL ENGINEERS
    JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, Sep. 2014, [Reviewed]
  • Study on real indoor damages of super-high-rise residential buildings during the 2011 off the pacific coast of tohoku earthquake related with structural responses
    Yoshiyasu Yamane; Masayuki Nagano; Takenori Hida; Mitoshi Yasui; Takeshi Yamamoto; Nozomu Ikawa; Takehiko Tanuma, To grasp indoor damages of super high-rise residential buildings during the Pacific coast of Tohoku earthquake, the height distributions of real damages to interior materials and nonstructural components were investigated based on the repair lists and questionnaire survey. Then the indoor damages were compared with the interstory drift angle of the buildings assessed by the simple presumption method based on the Strong motion data recorded at the building during the main shock. Consequently, the number of damages at the lower stories were greater than the higher stories. Then the damages tend to be greater with increasing the interstory drift angle.
    AIJ Journal of Technology and Design, Feb. 2014, [Reviewed]
  • Damage estimation of a super high-rise residential building during the 2011 off the pacific coast of tohoku earthquake and its residual seismic performance
    Yoshihiro Nogi; Masayuki Nagano; Takenori Hida; Takeshi Yamamoto; Mitoshi Yasui; Takehiko Tanuma; Kazuhiro Watanabe, During the 2011 off the Pacific Coast of Tohoku earthquake, most super high-rise RC buildings constructed in the metropolitan area had suffered severe shaking, leading to variation of dynamic properties due to structural damages. This study describes the damage estimation of the super high-rise RC building during the main shock using the 3D frame model. Their varying dynamic characteristics are discussed based on the system identification method. The dynamic properties during aftershocks are also investigated in view of the residual seismic performance after experiencing moderate-level structural damages.
    AIJ Journal of Technology and Design, Feb. 2014, [Reviewed]
  • Structural health monitoring of wooden structures by using subspace system identification based on shaking table tests　　　　　　　　　　　　　　　
    Takenori Hida; Masayuki Nagano; Toshiaki Sato, To evaluate the earthquake resistance of wooden structures, a structural health monitoring method based on subspace system identification was applied to acceleration data obtained from full-scaled shaking table tests of wooden post and beam structures made with plywood and brace. The ordinary Multi-variable Output-Error State sPace (MOESP) was used to evaluate the temporal variation of the natural frequency of the structure. As a result, the identified equivalent story stiffness was higher than the secant stiffness evaluated by the hysteresis loop of the specimen. This suggests that the subspace method might underestimate the structural damage., World Conference on Timber Engineering (WCTE)
    WCTE 2014 - World Conference on Timber Engineering, Proceedings, 2014
  • VALIDATION OF FRAME ANALYSIS MODELING FOR WOOD FRAME STRUCTURES WITH VISCO-ELASTIC DAMPERS AND INFLUENCE OF TEMPERATURE VARIATION ON SEISMIC PERFORMANCE
    KATO Jun; SATO Toshiaki; HIDA Takenori; IGUCHI Michio; MASAKI Yuichi; NAGANO Masayuki, This paper describes the validation of frame analysis modeling of wood frame structures with visco-elastic structural control devices. The accuracy of the analytical model is comfirmed by comparing it with the experimenal results of pseudo-dynamic tests and shaking table tests. The effects of temperature variation in the visco-elastic material are investigated by seismic response analyses. The analysis results show that these devices have exhibited high performance than others when the temperature of the visco-elastic material was 16°C., Architectural Institute of Japan
    AIJ Journal of Technology and Design, 2014
  • Evaluation of bedrock motions in Tokyo bay area and site amplification characteristics of long period ground motions during the 2011 off the pacific coast of tohoku earthquake
    Masayuki Nagano; Takenori Hida; Takehiko Tanuma; Kazuhiro Watanabe; Nozomu Ikawa; Shinji Itoh, This report describes engineering bedrock motions in Urayasu and Yumenoshima sites using the strong ground motions recorded in the downhole array observations during the 2011 off the Pacific Coast of Tohoku earthquake. Site amplification characteristics of long period ground motions are discussed in Tokyo bay area, where soft surface layers on the engineering bedrock attributed to amplification of the ground motions with period range over 1s.
    AIJ Journal of Technology and Design, Oct. 2013, [Reviewed]
  • Relation between evaluation of seismic response and damage of a reinforced concrete super high-rise residential building on poor ground -study on strong motion records during the 2011 off the pacific coast of tohoku earthquake -
    Takeshi Yamamoto; Mitoshi Yasui; Masayuki Nagano; Takenori Hida; Takehiko Tanuma; Kazuhiro Watanabe, During the 2011 off the Pacific coast of Tohoku Earthquake, strong motion wave observed at the 30-story reinforced concrete super highrise building located on poor ground in the Kanto region. By response simulation analysis, a particular response behavior of the building during this earthquake were explored, and then the relationship between damage to building interior and response simulation analysis results were carried out.
    AIJ Journal of Technology and Design, Jun. 2013, [Reviewed]
  • Effects of existing piles on lateral resistance of new piles
    Shuji Tamura; Keisuke Adachi; Tadashi Sakamoto; Takenori Hida; Yasuhiro Hayashi, Cyclic lateral-loading centrifuge tests were conducted on a new pile located at the center of 2 x 2 existing piles, to evaluate the effects of the existing piles on the new pile's lateral resistance when the piles of an old building are left derelict. Furthermore, two-dimensional FEM analyses of the horizontal cross sections of the pile soil systems were carried out. The centrifuge test results show that the lateral resistance of a new pile, located among existing piles, shows slight increases. The existing piles increase the horizontal subgrade reaction of the upper part of the new pile, but slightly decrease that of the lower part of the new pile. Numerical analyses reveal that the key to whether an existing pile increases the horizontal subgrade reaction of a new pile or not, is the soil displacement at the location of the existing pile. An existing pile increases the horizontal subgrade reaction of a new pile when the existing pile displacement is less than the soil displacement caused by the new pile. Conversely, an existing pile decreases the horizontal subgrade reaction of a new pile when the existing pile displacement is greater than the soil displacement caused by the new pile. (C) 2012 The Japanese Geotechnical Society. Production and hosting by Elsevier B.V. All rights reserved., JAPANESE GEOTECHNICAL SOC
    SOILS AND FOUNDATIONS, Jun. 2012, [Reviewed]
  • 自己アフィンフラクタルの概念を用いた地震動特性の評価に関する研究　　　　　　　　　　　　　　　
    肥田 剛典; 高橋 徹; 中道 哲也
    構造物の安全性と信頼性, Jun. 2007
  • Estimation of wave source location based on two point measurements
    Tamura Shuji; Hida Takanori, 地盤振動問題を考えるうえで、振動源位置の特定は重要である。多地点同時観測を行えば振動源位置の特定は可能であるが、多くのセンサーを必要とする。そこで、本研究では、簡便な2点3成分観測で、振動源位置を推定する手法を検討した。まず、1点加振源に対して1点3成分観測を行い、概ね波の到来方向を推定できることを示した。次に、2点加振に対し1点3成分観測を行ったところ、推定到来方向は2つの加振源の中間的なものになった。ただし、1点加振と2点加振で、コヒーレンスの方向特性が大きく異なるため、その判別は可能と考えられる。さらに、1点加振源に対して2点3成分観測を行い、概ね振動源位置を推定できることを示した。, The Japanese Geotechnical Society
    Proceedings of the Japan National Conference on Geotechnical Engineering, 2003

MISC

Books and other publications

  • 学びやすい建築構造力学―力の釣合いから振動まで―　　　　　　　　　　　　　　　
    Masayuki Nagano; Takenori Hida; Michio Iguchi, Joint work
    コロナ社, Mar. 2015
  • 建築構造の技術革新と人工知能　　　　　　　　　　　　　　　
    中村壮志・相澤景・石川翔太・坂口剛・佐藤公亮・瀬戸純平・滝勇太・肥田剛典・福本亜紀・藤本啓介・宮津裕次, Contributor
    日本建築学会, Jul. 2011

Lectures, oral presentations, etc.

Affiliated academic society

  • Apr. 2016 - Present, The Japanese Society for Artificial Intelligence
  • Nov. 2014 - Present, Atomic Energy Society of Japan
  • Apr. 2011 - Present, Japan Association of Earthquake Engineering
  • Apr. 2003 - Present, Architectural Institute of Japan

Research Themes

Academic Contribution Activities

  • 建物健全性モニタリング小委員会　　　　　　　　　　　　　　　
    Academic research planning
    01 Apr. 2012 - Present
  • 数値震動台研究開発分科会データサイエンスWG　　　　　　　　　　　　　　　
    Academic research planning
    国立研究開発法人防災科学技術研究所, 兵庫県三木市, 01 Apr. 2021 - 31 Mar. 2022
  • 日本地震工学会事業企画委員会　　　　　　　　　　　　　　　
    Academic research planning
    日本地震工学会, 建築会館, 01 Apr. 2020 - 31 Mar. 2022

Others

  • 東京理科大学客員准教授
    Apr. 2021 - Mar. 2022