基于震害资料的四川省藏式房屋地震易损性研究

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。

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

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.