摘要
不同地区、不同时期建成的城市建构筑物的抗震设防烈度不同,导致基于遭遇烈度建立的建构筑物地震易损性矩阵,在应用于按照标准设防烈度进行建设的城市规划区震害评估时存在一定的偏差。针对该问题,引入烈度差的概念,结合实地调研数据研究了典型城市的地震震害,分别采用地震烈度与烈度差建立城市建构筑物的地震易损性矩阵,并对结果进行比较,结合已有文献研究的案例统计,分析比较了基于烈度差的建筑抗震能力指数与模拟分析统计结果的差异。研究结果表明:基于烈度差构建的城市建筑地震易损性矩阵能更好地反应城市建筑震害情况,基于烈度差建立的城市建筑抗震能力指数和模拟分析统计的城市建筑抗震能力指数基本吻合,烈度差能更好的反应不同标准设防烈度的建筑抗震性能的差异。
The differences of seismic fortification levels existed in those structures built in different time and differ- ent area would introduce some bility of urban buildings basing introduced to assess the seismic deviation to the seismic vulnerability matrix when one try to assess seismic vulnera- on the encountered intensities. To solve the problem, the concept of intensity gap is damage of typical cities based on field observation datum. A comparison of seismic vulnerability matrix of urban buildings based on intensity gap and those based on encountered intensity is carried out. And meanwhile, another comparison of the seismic ability indexes based on intensity gap and those by the fi- nite element analysis results is also carried out. The results show that the seismic vulnerability matrix of urban buildings constructed through intensity gaps can reflect the seismic damage better. The seismic ability index of urban buildings based on intensity gap is basically consistent with that by simulation. Intensity gap can better reflect the different standard fortification intensity of the building seismic performance differences.
出处
《地震工程与工程振动》
CSCD
北大核心
2017年第4期77-84,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51168024)~~
关键词
地震灾害
抗震能力指数
易损性矩阵
烈度差
earthquake disaster
seismic ability index
vulnerability matrix
intensity difference
