基于震害资料的四川省藏式房屋地震易损性研究

Research on Seismic Vulnerability of Tibetan Folk Houses in Sichuan Province Based on Seismic Hazard Information

搜集自开展地震灾害直接损失评估以来,四川境内破坏性地震震害资料,统计省内藏式房屋在不同烈度不同破坏等级下的破坏比,给出易损性矩阵;采用房屋结构整体易损性分析方法,依据藏式房屋易损性矩阵,通过烈度与地震动参数的对应关系,以对数正态分布函数为模型,对藏式房屋在不同地震动参数(峰值速度)下超越毁坏、破坏、基本完好的概率曲线进行拟合,给出易损性曲线,为其他结构类型房屋的易损性研究、灾害损失评估工作及震害预测提供参考。

Based on the seismic hazard information about destructive earthquakes happened in Sichuan province since the implementation of seismic loss assessment,this article created a vulnerability matrix of Tibetan folk houses by analyzing their destruction ratio under different intensities and damage degrees;adopting methods of analyzing building structure vulnerability and log-normal distribution model,based on vulnerability matrix of Tibetan folk houses and the relationship between seismic intensity scales and ground-motion parameters,this article created a vulnerability curve by doing the probability curve fitting of Tibetan folk houses in the condition of being devastated,damaged and almost unaffected by earthquake under different seismic ground-motion parameters(at peak velocity),which provided references for vulnerability study of other building structures,seismic loss assessment and hazard prediction.