约束屈曲支撑在落地球形网壳中的减震效果分析

利用非线性有限元理论,对屈曲约束支撑在落地球形网壳中的减震性能进行研究.假设钢材为理想弹塑性,通过大型有限元分析软件ANSYS进行参数化建模并对算例进行具体分析.模型中的结构杆件采用Beam188单元,支撑部件采用Link8单元.在罕遇地震作用下对结构进行动力响应分析.根据约束屈曲支撑的力学性能对其进行10种方式的布置,并对10种布置方式的减震效果进行分析,得出较为合理的支撑布置方式,在最优布置下的减震效果可以达到20％.

Analysis of anti-seismic effect of floor lattice shell with buckling-restrained brace

Nonlinear finite element method was applied to investigation of the anti-seismic effect of floor lattice shell with buckling-restrained brace.Taking the steel material as ideal elastic and plastic,the parametrizational modeling of the floor lattice shell was conducted by using the large-sized software ANSYS,and its result was analyzed in the concrete by using a computational illustration.Where Beam188 element were selected for the rod structure members and Link8 element for the brace members.The dynamic response of the structure was analyzed in case of rare earthquake.According to the mechanical performance of the buckling-restrained brace,10 kinds of its disposition were taken and their anti-seismic effect was analyzed,so that a reasonable scheme of its disposition was obtained and in the case of an optimal disposition the anti-seismic effect has amounted to 20%.