填充墙对框架结构侧移及层间位移角影响分析

Analysis on the influence of infilled walls to lateral displacement and interstorey drift angle of RC frame

为了研究填充墙对框架结构侧移和层间侧移角的影响特点,给结构设计提供参考和建议,建立了29个带填充墙的框架结构有限元分析模型,输入3种不同的地震波进行了时程分析。填充墙体对框架结构抗侧移大小和层间侧移角的影响不容忽略,影响其大小的因素主要有填充墙体材料、数量、位置以及计算时地震波的选用。为避免由于填充墙体布置不当造成所谓的"薄弱层",建议本层填充墙体数量不得小于其上部楼层的60%。最后,给出了考虑填充墙体作用的结构刚度计算公式。

In order to know the influence of infilled walls to lateral displacement and interstorey drift angle of RC frame.29 finite element models of the RC frame with infilled walls are established,and the time-history analyses of the models under 3 different types of earthquake waves have been achieved.The results show that the influence of infilled walls on the RC frame can not be ignored,and the main influencing factors are of material,quantity,location of the infilled walls and the selection of earthquake waves.To avoid the weak storey causing by improper arrangement of infilled walls,it is suggested that the number of the infilled walls on the storey should not be less than 60% of its upper storey infilled walls.The formula about the structural stiffness for the RC frame with infilled walls is proposed.