汶川地震中框架填充墙结构震害数值模拟分析

Numerical analysis of seismic damage of masonry infilled reinforced concrete frames in Wenchuan earthquake

文章基于框架填充墙结构震害调查,分析了该结构震害产生的机理,建立填充墙等效斜撑分析模型,运用模态及静力弹塑性(Pushover)分析方法,对地震区一栋带有填充墙的框架结构建筑物进行数值计算。研究表明,填充墙的存在虽然会增加结构的刚度,增大地震作用,但是填充墙能吸收和消耗大量地震能量,保护框架主体结构免遭损伤,有利于提高房屋结构整体抗震能力。

Based on the investigation into masonry infilled RC frames in Wenchuan earthquake,this paper analyzes the damage mechanism of the masonry infilled RC frames,and applies equivalent diagonal strut to simulate a damaged building in the earthquake area by the methods of module and Pushover.The research indicates that although the masonry infilled frame increases the initial stiffness of the structure and the earthquake action,it can absorb and consume most seismic energy,which protects the frames from damage and improves the buildings＇ seismic performance.