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タイトル: | Critical Response of Nonlinear Base-Isolated Building Considering Soil-Structure Interaction Under Double Impulse as Substitute for Near-Fault Ground Motion |
著者: | Akehashi, Hiroki Kojima, Kotaro Fujita, Kohei https://orcid.org/0000-0002-4292-6819 (unconfirmed) Takewaki, Izuru https://orcid.org/0000-0002-5673-2409 (unconfirmed) |
著者名の別形: | 藤田, 皓平 竹脇, 出 |
キーワード: | critical excitation soil-structure interaction base-isolated building elastic-plastic response bilinear hysteresis near-fault ground motion resonance |
発行日: | 17-Jul-2018 |
出版者: | Frontiers Media SA |
誌名: | Frontiers in Built Environment |
巻: | 4 |
号: | 34 |
抄録: | The critical nonlinear response considering soil-structure interaction is investigated for a base-isolated building under a double impulse as a substitute for near-fault earthquake ground motions. The complicated model of the nonlinear base-isolated building considering soil-structure interaction is first modeled as a two-degree-of-freedom (2DOF) system (SDOF superstructure and base-isolation story) on a swaying-rocking spring-dashpot system. Then the 2DOF system on a swaying-rocking spring-dashpot system is transformed into an SDOF system on a swaying-rocking spring-dashpot system by neglecting the mass on the base-isolation story. Finally the SDOF system on a swaying-rocking spring-dashpot system is further transformed into an SDOF system by neglecting the mass and moment of inertia of the base mat. Since an explicit expression had been derived in the previous paper on the maximum elastic-plastic response of an SDOF damped bilinear hysteretic structure subjected to the “critical double impulse input” causing the maximum response for variable interval of impulses with the input level kept constant, this expression is applied to the finally transformed SDOF system. The transformation of structural viscous damping in different elements is another new aspect in this paper. The reliability and accuracy of the proposed simplification methodology are investigated by comparing with the results by the time-history response analysis under the critical double impulse and the one-cycle sine wave as a representative of the main part of the near-fault earthquake ground motion. |
著作権等: | © 2018 Akehashi, Kojima, Fujita and Takewaki. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
URI: | http://hdl.handle.net/2433/234970 |
DOI(出版社版): | 10.3389/fbuil.2018.00034 |
出現コレクション: | 学術雑誌掲載論文等 |
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