基于三层建筑E-Defense数据的等效阻尼方程的提出与验证

IF 5 2区 工程技术 Q1 ENGINEERING, CIVIL
Kyungjin Kim, Koichi Kusunoki, Yusuke Maida, Trevor Zhiqing Yeow
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引用次数: 0

摘要

评估主震后建筑物安全的一种方法是评估其在后续余震中的生存能力。以前研究主震-余震(MA)序列影响的研究通常假设主震和余震的强度相等,尽管最近的事件表明余震的强度可能更大。此外,过去的研究往往没有明确说明由于以前的地震事件可能已经存在的损害。本研究通过开发一种基于容量谱法(CSM)的方法来估计受损钢筋混凝土(RC)建筑在余震下的最大响应,从而解决了这些空白。这是通过修改日本建筑标准法中提供的等效阻尼方程来完成的,该方程用于确定CSM应用的需求减少因子,通过修改滞后参数来考虑现有的结构损伤。在日本E-defense设施进行的大型三层RC建筑振动台测试的实验数据用于验证该方法。使用E-defense数据发现:(i)修正迟滞曲线所采用的假设是合理的;(ii)在CSM中使用所提出的等效阻尼方程,与文献中已有的误差为42%的方程相比,误差(0.6%)要低得多。基于这些发现,提出的方法可以用来量化建筑物对未来地震事件的剩余变形能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Proposal and Validation of an Equivalent Damping Equation for Predicting the Response of Damaged RC Buildings in Aftershocks Using E-Defense Data of a Three-Story Building

One method to evaluate building safety following a mainshock is to evaluate its ability to survive subsequent aftershocks. Previous studies investigating the influence of mainshock-aftershock (MA) sequences often assume that the intensities of the mainshock and aftershock are equal, even though recent events have shown that the intensity of the aftershock may be greater. Furthermore, past studies often do not explicitly account for damage which may already exist due to previous seismic events. This study addresses these gaps by developing a method to estimate the maximum response of a damaged reinforced concrete (RC) building subjected to an aftershock based on the Capacity Spectrum Method (CSM). This was done by revising the equivalent damping equation provided in the Japanese Building Standard Law, which is used to determine the demand reduction factor for CSM applications, by modifying hysteretic parameters to account for existing structural damage. Experimental data from a large-scale shake-table test of a three-story RC building performed at the E-defense facility in Japan was used to validate this approach. It was found using the E-defense data that: (i) assumptions adopted for modifying the hysteresis curve were reasonable, and (ii) the use of the proposed equivalent damping equation in CSM resulted in much lower error (0.6%) compared to an existing equation from literature which had an error of 42%. Based on these findings, the proposed approach could be used to quantify the remaining deformation capacity of buildings against future seismic events.

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来源期刊
Earthquake Engineering & Structural Dynamics
Earthquake Engineering & Structural Dynamics 工程技术-工程:地质
CiteScore
7.20
自引率
13.30%
发文量
180
审稿时长
4.8 months
期刊介绍: Earthquake Engineering and Structural Dynamics provides a forum for the publication of papers on several aspects of engineering related to earthquakes. The problems in this field, and their solutions, are international in character and require knowledge of several traditional disciplines; the Journal will reflect this. Papers that may be relevant but do not emphasize earthquake engineering and related structural dynamics are not suitable for the Journal. Relevant topics include the following: ground motions for analysis and design geotechnical earthquake engineering probabilistic and deterministic methods of dynamic analysis experimental behaviour of structures seismic protective systems system identification risk assessment seismic code requirements methods for earthquake-resistant design and retrofit of structures.
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