摘要
软土地基低层房屋砌体结构在中国应用较多,但它在地震中易损性较高,分析软土地基低层房屋砌体结构易损性,能够为地震预测任务与震后灾害评价提供帮助。为此,提出软土地基低层房屋砌体结构地震易损性分析方法,建立软土地基低层房屋砌体结构墙体模型并采用基于IDA的房屋砌体结构易损性运算方法,从差异开洞大小、差异开动数目、差异砂浆强度、差异层高四个方面分析软土地基低层房屋砌体结构地震易损性。软土地基低层房屋砌体结构地震易损性分析结果显示,软土地基低层房屋砌体结构墙体的开洞率较大,易损性较高;开洞数目少,易损性低;砂浆强度越小,易损性较高;层高越高,易损性越高。
The masonry structure of low-rise building on soft soil foundation is widely used in China,but it has high vulnerability in earthquake.Analyzing the vulnerability of masonry structure of low-rise building on soft soil foundation can provide help for earthquake prediction task and post earthquake disaster evaluation.Therefore,this paper puts forward the seismic vulnerability analysis method of low-rise building masonry structure on soft soil foundation,establishes the wall model of low-rise building masonry structure on soft soil foundation,and uses IDA based vulnerability calculation method of building masonry structure to analyze the seismic vulnerability of low-rise building masonry structure on soft soil foundation from four aspects:different opening size,different starting number,different mortar strength and different storey height.The results of seismic vulnerability analysis of masonry structure of low-rise building on soft soil foundation show that the opening rate of masonry structure wall of low-rise building on soft soil foundation is large and the vulnerability is high;the number of openings is small and the vulnerability is low,the smaller the mortar strength is,the higher the vulnerability is;the higher the floor height is,the higher the vulnerability is.
作者
余克兴
YU Kexing(Shuohuang Railway Development Co.,Ltd.,Cangzhou 062350,China)
出处
《华南地震》
2020年第4期152-158,共7页
South China Journal of Seismology
关键词
软土地基
低层
房屋
砌体结构
地震
易损性
Soft soil foundation
Low rise
House
Masonry structure
Earthquake
Vulnerability
