Seismic loss risk assessment of RC frame structures designed according to Chinese code

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-05-01 DOI:10.12989/EAS.2021.20.5.571

Shuhe Wang, Ximing Li, Jubing Zhang

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引用次数: 1

Abstract

According to the PEER probabilistic seismic loss assessment methodology, a structure-level seismic risk assessment method was proposed and implemented for a set of RC frames designed according to Chinese seismic code. These frames were designed for fortification intensities of 6,7 and 8 and classified into 4,6 and 8 stories. Through incremental dynamic time history analysis (IDA), the statistical relationships of the maximum inter-story drift ratio with the seismic spectral acceleration were obtained and used to determine fragility curve for each damage states. The site seismic hazard model was established based on Chinese seismic code, and the probability distribution of each discrete intensity levels was derived. Using loss index from the Chinese standard and Hazus, the structure means annual frequency of collapse, the Expected Annual Financial Loss (EAL) and the Expected Annual Fatalities (EAF) were calculated. The variation trends of these performance metrics with seismic fortification intensities and structure heights were evaluated, and the weaknesses of the current seismic code of China were pointed out. It was concluded that the method proposed in this paper is simple and reliable for practical applications.

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按中国规范设计的钢筋混凝土框架结构的地震损失风险评估

根据PEER概率地震损失评估方法，提出并实现了一组按中国抗震规范设计的钢筋混凝土框架的结构级地震风险评估方法。这些框架设计为防御强度为6,7和8，分为4,6和8层。通过增量动力时程分析(IDA)，得到了最大层间位移比与地震谱加速度的统计关系，并用于确定各损伤状态的易损性曲线。根据中国抗震规范建立了场地地震危险性模型，推导了各离散烈度的概率分布。利用中国标准和Hazus中的损失指数，计算了结构均值年倒塌频率、预计年经济损失(EAL)和预计年死亡人数(EAF)。评价了这些性能指标随抗震设防烈度和结构高度的变化趋势，指出了中国现行抗震规范的不足之处。结果表明，本文提出的方法简单可靠，可用于实际应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.