填充墙对轻型钢框架结构抗震性能的影响

Influence of Filled Wall on Seismic Performance of Light Steel Frame Structure

目的研究开洞墙体在单调加载和循环加载作用下的受力性能,找出开洞墙体的破坏方式及其对结构抗震性能的影响.方法利用Abaqus有限元软件对填充墙钢框架进行拟静力分析,框架的主要变化参数为窗洞口的面积.结果 4个模型的承载力和刚度均有明显下降,当开洞率为42%时,模型承载力约为无开洞框架承载力的46.5%,此时结构的刚度和极限位移接近于纯钢框架.结论洞口对结构的承载力和抗侧刚度影响较大,随着洞口面积的增大,承载力和刚度随之降低,极限位移增大,结构的延性性能较好.结构洞口面积的设计不宜超40%.

The purpose of this paper is to study the mechanical behavior of wall with holes in the monotonic loading and cyclic loading, analysis of failure mode of the wall with holes and the structural seismic performance. The use of Abaqus finite element software to steel frame with filled walls for pseudo static analysis, the main changes of the parameters is the area of the window. The results show that four models of bearing capacity and stiffness are significantly decreased ,Among them when open hole rate was 42% ,the bearing ca- pacity of the model for about 46.5 % of the no open hole framework, stiffness and ultimate displacement with the pure steel frame is almost the same. The hole for the bearing capacity of the structure and the lateral stiffness of big effect, with the increase of the area, the bearing capacity and stiffness decreases, limit displacement increases, the ductility of the structure of the performance is better. At the same time the area of the hole of the structure should not be designed more than 40%.