低层冷弯薄壁型钢结构住宅整体性能分析

Integral Behavior Analysis of Cold-formed Thin-walled Steel Framing System of Low-rise Residential Buildings

基于有限元方法建立了典型低层冷弯薄壁型钢结构住宅的整体模型,通过计算分析得到了结构的模态,并获得了风荷载和地震荷载作用下结构的内力、变形和墙体剪力。通过改变楼板平面内刚度,验证了相对刚度法中楼板平面内无限刚性假设的合理性;并建议针对形体复杂的低层冷弯薄壁型钢结构,应采用有限元整体建模的方法求解墙体剪力。结果表明,低层冷弯薄壁型钢结构具有良好的整体性能,在抗震设防烈度为6度的地区可以满足承载力和变形的要求,且安全储备充足。

Based on finite element analysis method, a typical cold-formed thin-walled steel framing system of low-rise residential buildings was modeled. Authors analyzed internal forces, deformations and shear forces in walls of the building under wind load and earthquake load. Finally, the hypothesis of in-plane infinite stiff floor in the method of relative stiffness was inspected by changing the in-plane stiffness of the floor. Authors suggested that the finite element method should be used to calculate shear forces in walls of the structures with complicated shapes. The results indicate that the cold-formed thin-walled steel framing system has a well integral behavior and can accommodate the demands of load and deformation capacity in areas with earthquake intensity Ⅵ.