川南地区砖混结构房屋典型震害及地震易损性研究  

Typical damage and seismic vulnerability of brick-concrete structural buildings in south Sichuan

作　　者：张莹[1] 郭红梅[1] 尹文刚 赵真 何宗杭 黄文涛 ZHANG Ying;GUO Hongmei;YIN Wengang;ZHAO Zhen;HE Zonghang;HUANG Wentao(Sichuan Earthquake Agency,Chengdu 610041,Sichuan,China;Armed Police Officers College,Chengdu 610200,Sichuan,China;Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,Sichuan,China)

机构地区：[1]四川省地震局,四川成都610041 [2]武警警官学院,四川成都610200 [3]西南交通大学地球科学与环境工程学院,四川成都611756

出　　处：《地震工程学报》2024年第2期358-368,共11页China Earthquake Engineering Journal

基　　金：国家重点研发计划项目(2020YFA0710603-07);四川省重点研发项目(2020YFS0451);四川地震科技创新团队专项(201901)。

摘　　要：以川南地区为研究区,并以在建造方式上具有明显当地地域特征的砖混结构房屋为研究对象,结合砖混结构房屋建造特点及川南历史地震(如长宁6.0级地震)震害调查结果等,分析砖混结构房屋典型震害特征,统计其在不同烈度下不同破坏等级的比例,采用经验分析法得到初步的易损性矩阵。在此基础上,针对因样本局限性造成的结构在高烈度下破坏比例不全,使实际易损性矩阵缺失的问题,通过插值法,推算高烈度下的破坏比例,补全经验易损性矩阵,拟合出易损性曲线,建立以震害统计为主、数值模拟为辅的砖混结构易损性分析模型;并基于平均震害指数对比分析,对易损性分析的可靠性进行检验。结果表明,构建的易损性矩阵能客观反映川南地区砖混结构房屋的抗震能力,对开展震害预测、灾害损失评估及震害风险评估等工作具有实际应用价值。This paper takes brick-concrete structural buildings with local construction mode characteristics in the south Sichuan area as the research object.The typical damage characteristics of brick-concrete structures were analyzed based on the construction characteristics of brick-concrete structural houses and the investigation results of historical earthquake damage in south Sichuan,such as the Changning M 6.0 earthquake.The proportion of different damage levels under different intensities was calculated,and empirical analysis was used to obtain the preliminary vulnerability matrix.However,the actual vulnerability matrix was lacking due to the incomplete damage ratio of structures under high intensity caused by the sample limitation.Therefore,using the interpolation method,the empirical vulnerability matrix was supplemented to calculate the damage ratio under high intensity,and then the vulnerability curve was fitted.Thus,the vulnerability analysis model of brick-concrete structures,which was mainly based on seismic damage statistics and supplemented by numerical simulation,was established.The comparative analysis of the average seismic damage index facilitated testing the reliability of vulnerability analysis.Results show that the constructed vulnerability matrix can objectively reflect the seismic capacity of brick-concrete buildings in south Sichuan.This matrix also has practical application value for conducting seismic damage prediction,disaster loss assessment,and seismic damage risk assessment and prevention.

关 键 词：川南地区 砖混结构 震害特征 易损性矩阵 经验分析 数值模拟 

分 类 号：P315.9[天文地球—地震学]