冷弯薄壁型钢墙体抗剪性能有限元分析

Finite element analysis of shear performance of cold-formed thin-walled steel walls

为了研究薄钢板厚度、龙骨壁厚、波纹钢板类型和开洞等参数对冷弯薄壁型钢墙体抗剪性能的影响,利用有限元软件ABAQUS对组合墙进行了数值模拟.结果表明:增加墙面板厚度和选用波纹钢板墙面板能够显著增加其抗剪承载力;骨架厚度对墙体抗剪承载力影响较小;随着波纹钢板波长和波幅的减小,墙体承载力和初始刚度增大,屈服位移减小;波纹钢板覆面板的开洞尺寸对剪力墙性能影响较大;宽高比为1∶4和1∶2时,横向波纹钢板覆面剪力墙承载力高于纵向波纹钢板覆面剪力墙.

In order to study the effect of parameters,e. g. thickness of thin steel plate,thickness of frames and type and holing of corrugated steel plate,on the shearing performance of cold-formed thin-walled steel walls,composite walls were simulated with finite element software ABAQUS. The results showthat by increasing the thickness of wall panels and using corrugated steel panels,the anti-shear capacity of walls can be significantly improved and the thickness of frames has little effect on the anti-shear capacity of walls.With decreasing wave length and amplitude of corrugated steel plate,the bearing capacity and the initial stiffness of walls increase,while the yield displacement decreases. The holing size of plate sheathed with corrugated steel plate has significant influence on the performance of shearing walls. When aspect ratios were 1∶ 4 and 1∶ 2,the bearing capacity of shearing walls sheathed transversely with corrugated steel plates are higher than those sheathed longitudinally.