| 李思齐,于天来,张明.多烈度区多层RC框架结构实际震害易损性分析[J].,2020,60(2):200-208 |
| 多烈度区多层RC框架结构实际震害易损性分析 |
| Vulnerability analysis of multi-storey RC frame structures in multi-intensity zone under empirical seismic damage |
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| DOI：10.7511/dllgxb202002012 |
| 中文关键词:RC框架结构震害调查地震烈度易损性分析平均震害指数 |
| 英文关键词:RC frame structureseismic damage investigationseismic intensityvulnerability analysisaverage damage index |
| 基金项目:国家自然科学基金资助项目(51608452)；中国博士后科学基金资助项目(2017M621594). |
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| 中文摘要: |
| 为了研究区域多层RC框架结构地震易损性，以汶川地震都江堰930栋该类结构实际震害调研样本为研究背景进行了数值统计分析．首先，对该市RC框架结构按照震损等级进行了归纳与统计，给出了样本数量与震损等级的非线性拟合模型，考虑楼层数、年代、抗震设防因子对其影响和多烈度区特点，分别建立了易损性矩阵与连续型非线性回归模型．提出了平均震害指数计算模型，并结合调查数据得到了基于该参数的易损性矩阵与回归曲线．上述分析结果可为地震烈度标准修订和抗震设计提供一定的基础借鉴． |
| 英文摘要: |
| In order to study the seismic vulnerability of regional multi-storey RC frame structures, a numerical statistical analysis is carried out on 930 samples of Dujiangyan structures in Wenchuan earthquake. Firstly, the RC frame structure in this city is summarized and counted according to the earthquake damage grade, and the nonlinear fitting model of sample size and earthquake damage grade is given. Considering the influence of floor number, age, seismic fortification factor and the characteristics of multi-intensity zone, the vulnerability matrix and the continuous nonlinear regression model are established respectively. A calculation model of average seismic damage index is proposed, and the vulnerability matrix and regression curve based on this parameter are obtained by combining the survey data. The above analysis results can provide some basic reference for revision of seismic intensity standard and seismic design. |
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