Seismic performance evaluation of bridge pier with friction pendulum isolation system

B. Brito, T. Seto, Y. Ichikawa, N. Ishigaki, M. Suezaki, M. Akiyama

研究成果: Conference contribution

抄録

After the Great Hanshin Kobe Earthquake (1995), extensive effort for improving the seismic performance of bridges in the Japanese engineering community have been carried out. Although, isolation system has become effective to ensure the seismic resilience of bridge structures, high axial load and large displacements under strong ground motions are not well understood; moreover, during Tohoku Earthquake (2011) and Kumamoto Earthquake (2016), some damages of laminated rubber bearing were observed. Undoubtedly, it is necessary to continue developing the isolation systems by exploring new concepts. In this study, seismic performance evaluation of a novel system to isolate the superstructure by forming a concave sliding surface on the top of the concrete bridge pier; is experimentally conducted. Any seismic devices are not included for lengthening the system to a longer natural period, and based on the principle of pendulum the seismic energy can be dissipated through the frictional force. Proposed Friction Pendulum Isolation System (FPIS) possess re-centering capability while sliding toward the initial position, and large displacement can be enhanced. The results exhibited shear force-displacement relationship with a smooth behavior in the longitudinal direction; furthermore, the longitudinal and transverse direction depicted an appealing circular displacement orbit.

本文言語English
ホスト出版物のタイトル11th National Conference on Earthquake Engineering 2018, NCEE 2018
ホスト出版物のサブタイトルIntegrating Science, Engineering, and Policy
出版社Earthquake Engineering Research Institute
ページ5760-5764
ページ数5
ISBN(電子版)9781510873254
出版ステータスPublished - 2018
イベント11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018 - Los Angeles, United States
継続期間: 2018 6 252018 6 29

出版物シリーズ

名前11th National Conference on Earthquake Engineering 2018, NCEE 2018: Integrating Science, Engineering, and Policy
9

Conference

Conference11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018
国/地域United States
CityLos Angeles
Period18/6/2518/6/29

ASJC Scopus subject areas

  • 地盤工学および土木地質学

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