Y型偏心支撑框架结构滞回性能数值模拟

摘要

考察ANSYS软件进行Y型偏心支撑钢框架的滞回性能的数值模拟的可行性.根据已有Y型偏心支撑钢框架滞回性能试验,分别建立梁壳模型、全壳模型、全实体模型进行数值分析.对比数值模型与试验的滞回性能曲线,分析数值模拟与试验得出的承载力、初始刚度、卸载刚度、刚度退化及耗能能力的差异.研究表明,在模拟承载力及刚度退化时采用全实体模型更为合适,模拟初始刚度、卸载刚度及耗能能力时采用梁壳模型更为合适.%Verified the reliability of hysteretic behavior of Y-shape eccentrically braced steel frame using ANSYS software. Based on the hysteretic behavior test of Y-shape eccentrically braced steel frame, beam and shell model, shell model and solid model were constructed. The hysteretic curves of numerical model were compared with the ex-periment curves. The differences between finite element analysis and experiment on bearing capacity, initial stiff-ness, unloading stiffness, stiffness degradation and energy dissipation were analyzed. The results show that using solid model can be more suitable for bearing capacity and stiffness degradation, using beam and shell model can be more suitable for initial stiffness, unloading stiffness, stiffness degradation and energy dissipation.