Takao HARADAProfessor
■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), Structural and seismic engineering, 構造工学，地震工学（維持管理工学，点検，モニタリング，健全性診断，劣化予測，メンテナンス，マネジメント）
- Social infrastructure (civil Engineering, architecture, disaster prevention), Structural and seismic engineering, Structural Engineering, Earthquake Engineering, Maintenance Management Engineering
Research Keyword
Educational Background
Career
External link
■Research activity information
Award
Paper
- 橋梁長寿命化修繕計画における既存橋梁の撤去および継続利用の評価手法に関する検討
尾場瀬 美綺; 原田 隆郎; 大﨑 康弘; 大久保 克紀, Corresponding
土木学会インフラメンテナンス実践研究論文集, 22 Feb. 2025, [Reviewed] - The effect of deterioration damage due to aging on the soundness of steel flap gate
Yuki Tanaka; Takao Harada; Go Kanamori; Tomoaki Kuwashima, Corresponding
土木学会構造工学論文集, Mar. 2024, [Reviewed] - Basic study on rust appearance evaluation of weathering steel materials using feature amount extracted by CNN and dimensionality reduction visualization method
井上竜希,原田隆郎, Corresponding
AI・データサイエンス論文集, Nov. 2023, [Reviewed] - Investigation on cost reduction effect of partical repainting considering temporary coating
Munechika Kawamata; Takao Harada, Corresponding
土木学会構造工学論文集, 11 Apr. 2023, [Reviewed] - A BASIC STUDY ON IMPROVING VERSATILITY OF THE RUST CONDITION RATING MODEL FOR WEATHERING STEEL BY USING CONVOLUTIONAL NEURAL NETWORKS
Koo SASAKI and Takao HARADA, Corresponding
土木学会論文集, 28 Mar. 2023, [Reviewed] - BASIC STUDY ON RUST IMAGE GENERATION OF WEATHERING STEEL BY GENERATIVE ADVERSARIAL NETWORKS
Koichiro TAMURA and Takao HARADA, Corresponding
AI・データサイエンス論文集, 17 Nov. 2021, [Reviewed] - 橋梁点検時における応急塗装の腐食抑制効果に関する実験的検討
原田隆郎, Lead
土木学会構造工学論文集, Mar. 2020, [Reviewed] - フラクタル次元を用いた耐候性鋼材のさび形状評価に関する研究
町田純平; 原田隆郎, Last
土木学会論文集F3（土木情報学）, Mar. 2020, [Reviewed] - 供用中の鋼製起伏堰を対象とした実用的な更新計画の検討
原田隆郎; 金森豪; 桑島智明, Lead
土木学会構造工学論文集, Mar. 2019, [Reviewed] - 生体脈波を利用した歩道橋横断時の不快感評価に関する基礎的研究
原田隆郎; 横山功一, Lead, It is most important to propose the evaluation technique of the unpleasantness which a human body receives due to bridge vibration. In this study, the experiment to measure physiological information was performed in order to propose evaluation technique of serviceability of pedestrian bridges. In the experiment, the vibration of both pedestrian bridges and pedestrians were measured simultaneously, and the relation of both vibration characteristic and the biological pulse wave have been investigated. As the result, it is found that the Lyapunov exponent of biological pulse wave could be used as an index for evaluating the unpleasant bridge vibration which pedestrians feel., Japan Society of Civil Engineers
土木学会構造工学論文集, Mar. 2016, [Reviewed] - PVDFフィルムセンサによるひび割れ検知に関する研究
原田隆郎; 横山功一; 田名部菊次郎, Lead, Structural monitoring with various sensors has been used as a quick quantifying of damages of infrastructures. In this paper, a strain measurement using piezoelectric PVDF (polarized polyvinylidene fluoride) film is studied. First, sensing performance of the PVDF film on static measurement was compared with traditional strain gages. A PVDF film sensor for crack detection was developed. The crack progress on an aluminum specimen was monitored with the developed PVDF film sensor. Moreover, the PVDF film sensor has been used to monitor the initiation and propagation of cracks on RC specimens., Japan Society of Civil Engineers
土木学会構造工学論文集, Mar. 2013, [Reviewed] - 生体脈波を用いた道路の乗り心地評価に関する基礎的研究
原田隆郎; 横山功一, Lead, In this study, the methodology to evaluate a road riding comfort was proposed by using biological pulse wave. The road riding comfort was defined by Lyapunov exponent calculated from biological pulse wave of driver and passenger during vehicles running. Through some experiment, it was found that the biological pulse wave was effective as the way of adopting human sensuous evaluation in order to estimate influence of the road riding comfort. And how to use the road riding comfort index was examined for road asset management. It could confirm that the riding comfort of every road could be distinguished by using biological pulse wave relatively., Japan Society of Civil Engineers
土木学会論文集F4（建設マネジメント）, 20 Apr. 2012, [Reviewed] - 横断歩道橋の支柱に生じたき裂損傷の原因調査と対策
三木千壽; 小野 潔; 横山功一; 原田隆郎, A Serious fracture that extended halfway through the circumference of a steel pipe column was discovered in a pedestrian bridge across a prefectural road. A lot of pedestrian bridges have been designed and constructed according to the standard specifications. Therefore, there is a possibility that pedestrian bridges whose structural details are the same as those of fractured pedestrian bridges in this paper may exist. It is very important to identify the cause of the fracture for preventing the same failure mode.
In order to identify the cause of the fracture, observation of crack surface, SEM observation, material property tests, measurement of strain and calculating histogram of the stress range and the frequency were carried out. Moreover, the fractured steel pipe column of the pedestrian bridge was retrofitted by applying bolted splice rings and plates., Japan Society of Civil Engineers
土木学会論文集A, 2009, [Reviewed] - ニューラルネットワークを用いた橋脚の地震時リアルタイム損傷判定法に関する検討
横山功一; 原田隆郎; 黒田 聡; A.K.M; Rafiquzzaman, It is expected that damages of transportation system including highway bridges cause serious interference of traffic function and recovery efforts, when a large earthquake occurs to a densely populated urban area as it was happened during the great Hanshin Awaji Earthquake in 1995. Therefore, the real-time earthquake damage detection system for bridge structures seems to be necessary to provide information of damages in transportation network system just after the occurrence of the earthquake and to assist the damage reduction, prevention of damage expansion and recovery works. This research proposes the method of evaluating the damages of bridge pier to provide useful information for real-time earthquake damage detection system by using Neural Networks technique. In this study, the emulator was constructed first to express intact structure by using Neural Networks. Then, it was examined whether the difference between output of the emulator and measured response of the bridge pier showed the damages of the bridge structure. Dynamic experimental data which were acquired at the shaking table test of RC single column conducted by Public Works Research Institute, Tsukuba, were used to verify the proposed method. Amplitude ratio and phase difference were selected to show the difference between output of the emulator and measured response of the bridge pier. As a result, it was confirmed that these two indices corresponded well to the damages, namely the change in the natural frequencies and the damping constant. The proposed method is able to provide the useful information for damages more quickly than frequency domain analysis method., JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING
日本地震工学論文集, Jul. 2007, [Reviewed] - 構造ヘルスモニタリングにおけるひずみ測定の温度影響の補正に関する研究
町口敦志; 横山功一; 原田隆郎; 高木優任
構造工学論文集, Mar. 2007, [Reviewed] - Cost evaluation in bridge inspection strategies by using real options method
Harada; T. and Yokoyama; K., Lead
Life-Cycle Cost and Performance of Civil Infrastructure Systems, 2007, [Reviewed] - Performance of a BOTDR optical fibre sensing technique for crack detection in concrete structures
Wu; Z. S.; Xu; B.; Takahashi; T. and Harada; T
Journal of Structure and Infrastructure Engineering, Nov. 2006, [Reviewed] - Electrical and Mechanical Characterization of Hybrid CFRP Sheets
Wu; Z.S.; Yang; C.Q.; Tobe; Y.; Ye; L.P. and Harada; T.
Journal of Composite Materials, Feb. 2006, [Reviewed] - Structural health monitoring in a tunnel management system
Harada; T.; Miyazawa; S. and Wu; Z.S., Lead
Proc. of International Symposium on Innovation & Sustainability of Structures in Civil Engineering - Including Seismic Engineering, Nov. 2005, [Reviewed] - An Experimental Study on the Measuring Characteristic of BOTDR for Structure Health Monitoring
Wu; Z.S.; Shi; B.; Harada; T. Ishii; T. and Xu; B
China Civil Engineering Journal, Aug. 2005, [Reviewed] - Self-diagnosis of structures strengthened with hybrid carbon-fiber-reinforced polymer sheets
Wu; Z.S.; Yang; C.Q.; Harada; T. and Ye; L.P.
Smart Materials and Structure, Jun. 2005, [Reviewed] - A soft post-earthquake damage identification methodology using vibration time series
Xu; B.; Wu; Z.S.; Yokoyama; K. and Harada; T.
Smart Materials and Structure, Jun. 2005, [Reviewed] - Optimization of maintenance strategies for road pavement by considering flexibility of alternatives
Harada; T. and Yokoyama; K., Lead, Maintenance strategy might be changed in future due to uncertainty included in cost of maintenance and operation, degradation of infrastructure, budget, change of social system, technology innovation and so forth. The present value (PV) method commonly used for alternative evaluation cannot consider uncertainty that is expected to occur in future. On the other hand, real options (RO) method is new technique that can consider the value of flexibility of alternative. In this study, optimization system of maintenance strategies for road pavement by using real options has been developed. Through the numerical simulations on road pavement, it was confirmed that the alternatives which have flexibility more abundantly were drawn as optimum solution by considering of option values., Japan Society of Civil Engineers
Proc. of 4th International Workshop on Life-Cycle Cost Analysis and Design of Civil Infrastructure Systems, May 2005, [Reviewed] - 計画案のフレキシビリティを考慮した道路舗装の維持管理計画策定システムの開発
原田隆郎; 吉田勘平; 横山功一, Lead, Maintenance strategy might be changed in future due to uncertainty included in cost of maintenance and operation, degradation of infrastructure, budget, change of social system, technology innovation and so forth. The present value (PV) method commonly used for alternative evaluation cannot consider uncertainty that is expected to occur in future. On the other hand, real options (RO) method is new technique that can consider the value of flexibility of alternative. In this study, optimization system of maintenance strategies for road pavement by using real options has been developed. Through the numerical simulations on road pavement, it was confirmed that the alternatives which have flexibility more abundantly were drawn as optimum solution by considering of option values., Japan Society of Civil Engineers
土木学会舗装工学論文集, Dec. 2004, [Reviewed] - Applying Moving Vehicle Load to Structural Identification and Health Monitoring of Bridges
Rafiquzzaman; A.K.M.; Yokoyama; K.; Yoshizawa; E. and Harada; T
Second International Workshop on Structural Health Monitoring of Innovative Civil Engineering Structures, Sep. 2004, [Reviewed] - 鋼合成桁の温度分布に影響を及ぼす環境要因に関する実験的研究
高木優任; 横山功一; 原田隆郎
構造工学論文集, Mar. 2004, [Reviewed] - In-situ damage detection of concrete beams strengthened with hybrid CFRP sheets by DC electrical resistance
Wu; Z.S.; Yang; C.Q.; Harada; T. and Tobe; Y.
First International Conference on Structural Health Monitoring and Intelligent Infrastructure (SHMII-1'2003), Nov. 2003, [Reviewed] - 都市インフラに関する構造ヘルスモニタリングの現状と展望－展望論文－
呉 智深; 許 斌; 原田隆郎, Last, 土木学会
土木学会応用力学論文集, Aug. 2003, [Reviewed], [Invited] - 外部環境の変化がインテグラル複合ラーメン橋の挙動に及ぼす影響に関する検討
高木優任; 横山功一; 原田隆郎
鋼構造論文集, Jun. 2003, [Reviewed] - 橋梁の補修履歴データによる補修率曲線の同定
原田隆郎; 横山功一, Lead, Repair hysteretic data of the highway bridges is not effectively used in management system for the reason that repair hysteretic data is not accumulated enough. However, repair hysteretic data is effective information for planning of maintenance strategies. This study analyzed the relationship of repair frequency to the accumulated track traffic volume by using repair hysteretic data. Moreover, repair rate curve was identified by applying analytical results to logistic curve. In addition, long-term maintenance strategies were suggested by using the repair rate curves., Japan Society of Civil Engineers
土木学会論文集, Jun. 2003, [Reviewed] - 遺伝的アルゴリズムの階層化による橋梁の維持管理計画モデルの開発
原田隆郎; 富田義紀; 横山功一, Lead, Recently, due to the increasing maintenance expense for road and bridge structures, it is urgently demanded to draw up maintenance strategies more economically. In this study, proposed was to make maintenance strategies of highway bridges by using multi-layer GA. Through the numerical simulations, the following conclusions are obtained; 1) The proposed GA model can successfully achieve the escape from the local minimum; 2) This model is effective for making maintenance strategies of highway bridges., Japan Society of Civil Engineers
土木情報システム論文集, Oct. 2001 - Adaptive Localized Control of Structure-Actuator Coupled System using Multi-layer Neural Networks
Xu; B.; Wu; Z. S.; Yokoyama; K. and Harada; T., 土木学会
Journal of Structural Mechanics and Earthquake Engineering, JSCE, Jul. 2001, [Reviewed] - Decentralized Control of a Cable-stayed Bridge Using Multi-layer Neural Networks
Xu; B.; Wu; Z. S.; Yokoyama; K. and Harada; T., The structural identification and dynamic control of a cable-stayed bridge are considered to be difficult due to the structural complicacy and system uncertainties. In this paper, based on the concept of decentralized information structures, a decentralized non-parametric identification and control method is proposed with neural networks for the purpose of suppressing the vibration of a well-studied and documented two-cable-stayed bridge induced by earthquake excitations. The control strategy proposed here uses the stay cables as active tendons to provide control forces through appropriate actuators. Each individual actuator is controlled by a decentralized neuro-controller that only uses local velocity and relative displacement information. The feature of decentralized control simplifies the implementation of the control algorithms and makes decentralized control easy to practice and cost effective. The effectiveness of the decentralized identification and control algorithm is evaluated through numerical simulations. The performance of the decentralized control is compared with that of the linear decentralized control method. And the adaptability of the decentralized neuro-controllers for different kinds of earthquake excitations is demonstrated via simulations., JAPAN SOCIETY FOR COMPUTATIONAL ENGINEERING AND SCIENCE
Transactions of JSCES, May 2001, [Reviewed] - 固有振動数の変化による大型構造システムの局所劣化同定法の提案
呉 智深; 原田隆郎; 三宅博之
構造工学論文集, Mar. 2000 - 遺伝的アルゴリズムによる大規模既存道路橋の耐震補強計画支援モデルの構築
呉 智深; 原田隆郎; 横山功一
構造工学論文集, Mar. 1998, [Reviewed] - Genetic Algorithms-based reinforcement strategies for large scale deteriorating road bridges
Wu; Z. S.; Harada; T. and Sato; F.
Proc. of 7th Int. Conf. on Computing in Civil and Building Engineering, Aug. 1997, [Reviewed] - Optimum modeling for maintenance planning of road pavements using Hopfield Neural Network
Wu; Z. S.; Yoshida; N.; Harada; T. and Iwamatsu
Proc. of 7th Int. Conf. on Computing in Civil and Building Engineering, Aug. 1997, [Reviewed] - Computational modeling on parameter estimation of large scale structures from static responses
Wu; Z. S.; Iwamatsu; S. and Harada; T.
Proceedings of the 3rd Asian-Pacific Conference on Computational Mechanics, Sep. 1996, [Reviewed] - フラクタル次元・１／ｆゆらぎを応用した橋梁の景観性評価支援システム
吉岡正泰; 岩松幸雄; 原田隆郎; 阿久澤孝之, Recently, consideration of the aesthetic evaluation into the process of bridge design has been increasingly important to make bridges harmonize with the surrounding environment and give "the grace and relief" to the human minds. However, there are not any aesthetic indices used commonly in bridge design, because it is difficult to evaluate aesthetic sense of human being quantitatively.
In this study, we constructed an aesthetic evaluation system for selection of type of bridge by the fuzzy sets theory, in which concepts of fractal dimension and 1/f fluctuation are used to quantify the aesthetic level of designed bridges. The application of this system to actually designed bridges indicate that the concepts were useful for the aesthetic evaluation., Japan Society of Civil Engineers
土木情報システム論文集, Oct. 1993, [Reviewed] - 橋梁の比較設計支援エキスパートシステムに関する研究
岩松幸雄; 早川裕史; 原田隆郎, In recent years, the computering in civil engineering had been applied not only in CAD but also in Expert System. But, they did not need a synthetic knowledges and experience of a designer such as comparative design which is judged a whole bridge by plural elements, and deviated from primary mean of Expert System or Artificial Intelligence. In this paper, we picked up superstructure, substructure, and fundamental structure of bridge as the object of this study, and proposed Expert System which introduced plural estimated elements which economics, workability, adaptablity to environment and so on. And the efficiency of the proposed system is demonstrated by the comparison between the result of this system and the past actual example of comparative., Japan Society of Civil Engineers
土木学会論文集, Sep. 1992, [Reviewed]
MISC
- Development of Bridge Inspection System by Using Wireless Network Technologies
Harada; T. and Yokoyama; K.
The 4th International Workshop on Advanced Smart Materials and Smart Structures Technologies, Tokyo, Japan, 2008
Lead - Development of Sharing-Type Genetic Algorithm for Optimum Maintenance Strategies
Harada; T. and Yokoyama; K.
Joint 4th International Conference on Soft Computing and Intelligent System and 9th International Symposium on Advanced Intelligent Systems, 2008, [Reviewed]
Lead - Structural Monitoring using Piezoelectric Film
Yokoyama; K. and Harada; T.
Proceedings of the 24th US-Japan Bridge Engineering Workshop, Ninneapolis, Minnesota, USA, 2008 - Condition-based Inspection of Highway Bridges
Yokoyama; K.; Harada; T. and Rafiquzzaman; A.K.M.
The International Symposium on Advances in Urban Safety, 2007
Lectures, oral presentations, etc.
- 橋梁長寿命化修繕計画における既存橋梁の撤去および継続利用の評価手法に関する検討
尾場瀬美綺; 原田隆郎; 大﨑康弘; 大久保克紀
土木学会第4回インフラメンテナンス・シンポジウム, 28 Feb. 2025
20250227, 20250228 - 橋梁点検結果の所見を用いた短期的な健全度低下予測の試み
高村茜; 原田隆郎; 大﨑康弘; 大久保克紀
土木学会第79回年次学術講演会，CS11-45, 06 Sep. 2024
20240905, 20240906 - 橋梁定期点検画像を用いた損傷分類と健全度判定のモデル構築に関する検討
新井悠介; 原田隆郎; 大﨑康弘; 大久保克紀
土木学会第79回年次学術講演会，CS11-34, 05 Sep. 2024
20240905, 20240906 - 橋梁長寿命化修繕計画における既存橋梁の集約・撤去に関する基礎的研究
尾場瀬美綺,原田隆郎,大﨑康弘,大久保克紀
土木学会第79回年次学術講演会，VI-469, 05 Sep. 2024
20240905, 20240906 - 老朽化に伴う劣化損傷が鋼製起伏堰の健全性に及ぼす影響の検討
田中佑樹,原田隆郎,金森豪,桑島智明
土木学会第70回構造工学シンポジウム, 14 Apr. 2024 - CNNにより抽出した特徴量と次元削減可視化手法を用いた耐候性鋼材のさび外観評価に関する基礎的研究
井上竜希,原田隆郎
土木学会 第4回 ＡＩ・データサイエンスシンポジウム, 16 Nov. 2023 - 軽量プレキャスト合成床版を用いた桁端部のグループスタッド配置における合成挙動
河西健太,原田隆郎,山本将士,木村恭介,鬼満悠
土木学会第78回年次学術講演会，VI-722, 15 Sep. 2023 - 応急塗装を考慮した部分塗替え塗装のコスト縮減効果に関する検討
川又宗近,原田隆郎
土木学会第69回構造工学シンポジウム, 16 Apr. 2023 - 畳み込みニューラルネットワークによる耐候性鋼材のさび外観評点判定モデルの汎用性向上に関する検討
佐々木輝音,原田隆郎
土木学会第47回土木情報学シンポジウム, 29 Sep. 2022 - 軽量プレキャスト合成床版を用いた床版取替工事における鋼桁補強数量の低減効果の解析的検討
鬼満悠,原田隆郎,大柳英之
土木学会第77回年次学術講演会，VI-356, 15 Sep. 2022 - 応急塗装を考慮した部分塗替え塗装のコスト縮減効果に関する検討
川又宗近,原田隆郎
土木学会第77回年次学術講演会，VI-390, 15 Sep. 2022 - 現地踏査結果に基づく老朽化した鋼製起伏堰の健全性に関する解析的検討
皆川将尉,原田隆郎,金森豪,桑島智明,根本諒介
土木学会第77回年次学術講演会，VI-376, 15 Sep. 2022 - 敵対的生成ネットワークを用いた耐候性鋼材のさび画像生成に関する基礎的研究
田村晃一郎,原田隆郎
土木学会 第2回 ＡＩ・データサイエンスシンポジウム, 17 Nov. 2021 - 敵対的生成ネットワークを用いた耐候性鋼材のさび画像生成に関する基礎的研究
田村晃一郎,原田隆郎
土木学会第76回年次学術講演会，CS14-50, 10 Sep. 2021 - 複数回の定期点検データを用いた橋梁部材の劣化予測に関する検討
市川奈央子,原田隆郎
土木学会第76回年次学術講演会，VI-719, 10 Sep. 2021
