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タイトル: | Collapse-Limit Input Level of Critical Double Impulse for Damped Bilinear Hysteretic SDOF System With Negative Post-yield Stiffness |
著者: | Saotome, Yoshito Kojima, Kotaro Takewaki, Izuru https://orcid.org/0000-0002-5673-2409 (unconfirmed) |
著者名の別形: | 五月女, 義人 小島, 紘太郎 竹脇, 出 |
キーワード: | earthquake response critical excitation double impulse collapse bilinear hysteresis viscous damping |
発行日: | Sep-2019 |
出版者: | Frontiers Media SA |
誌名: | Frontiers in Built Environment |
巻: | 5 |
論文番号: | 106 |
抄録: | The collapse-limit input velocity level of the critical double impulse simulating the principal part of near-fault ground motions is derived for an elastic-plastic structure with viscous damping and P-delta effect. The structural system is modeled by a bilinear hysteretic SDOF system with negative post-yield stiffness reflecting the P-delta effect which plays a key role in the collapse behavior. Since the critical timing of the second impulse in the double impulse has been proven as the zero-restoring force timing after the first impulse for the elastic-plastic SDOF system with viscous damping, that property is used again in this paper. It is shown that the collapse-limit input level of the critical double impulse can be obtained as a function of the post-yield stiffness and the damping ratio by using the energy balance law and the quadratic-function approximation of the damping force-deformation relation. The applicability of the collapse-limit level to actual recorded ground motions is investigated through the time-history response analysis for the stable models and the collapse models under two actual earthquake ground motions. |
著作権等: | © 2019 Saotome, Kojima 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/2433/262764 |
DOI(出版社版): | 10.3389/fbuil.2019.00106 |
出現コレクション: | 学術雑誌掲載論文等 |
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