含填充墙的框架结构周期折减系数研究

Research on period reduction factor of frame structure with filled wall

本文在含填充墙的框架模型振动台试验的基础上,以填充墙数量、布置方式和填充墙材料为参数构造不同的分析模型,采用有限元软件ABAQUS进行数值模拟,研究不同参数变化引起的结构自振周期及周期折减系数变化规律,并与规范建议取值范围进行对比。结果表明:周期折减系数随填充墙填充率的增大而减小,当填充率超过80%时,规范建议的周期折减系数取值偏大;在填充率不变的情况下,改变填充墙布置方式对周期折减系数的影响较小,且随着填充率的增大而减小;在相同填充率情况下,不同材料填充墙对周期折减系数有一定影响,规范建议取值范围偏窄。

In this paper,on the basis of the shaking table test of the frame model of the filled wall,different analysis models are constructed with the parameters of the number of the filled wall,the way of layout and the material of the filled wall. The finite element software ABAQUS is used for numerical simulation to study the natural vibration period and period reduction factor variation rule caused by the change of different parameters,and the value range suggested by the specification is compared. The results show that the periodic reduction coefficient decreases with the increase of the filling rate of the filled wall. Under the condition that the filling rate remains unchanged,the influence of changing the layout of the filling wall on the period reduction factor is small and decreases with the increase of the filling rate. In the case of the same filling rate,the filling wall of different materials has a certain influence on the period reduction factor.