汶川地震中框架楼梯典型震害分析与有限元计算

Typical Seismic Damage Analysis and Finite Element Calculation of Stair in Frame in Wenchuan Earthquake

基于汶川地震中框架结构楼梯的典型震害调查,探讨了楼梯震害产生的原因;并以某5层框架结构办公楼为例,利用有限元软件建立空间分析模型,对比了传统模型与考虑楼梯构件参与整体计算模型的分析结果,讨论了楼梯构件对框架整体受力和变形的影响;并且提出了楼梯构造处理和抗震设计建议。

Based on the investigation of typical damage phenomena of stairs in RC frames in Wenchuan Earthquake,the causes of stairs damage in RC frames are analyzed,and a five-floor frame building is taken as an example.By means of finite element software building spatial analysis models,the analysis results of the traditional model are compared with those of the overall structure calculation model that takes the staircase component into account and discuss the impacts stairs exercise on the overall force and deformation of the framework.At last the structural measures of dealing with the staircase damage in the earthquake and suggestions on seismic design are proposed.