防屈曲耗能支撑在三边简支网架结构中的应用研究

采用SAP2000V14.1对防屈曲耗能支撑在矩形平面三边简支一边自由的斜放四角锥网架结构进行了弹塑性时程分析。在难以直接比较多方案网架结构减震优劣的情况下,提出了以综合轴力减震值作为进一步的比较指标的方法,并用此方法对9种防屈曲耗能支撑替换方案的减震效果进行了对比分析。得出了较优的替换方案。为今后该类网架结构的耗能减震设计提供了参考依据。此外对结构不同部位的动力响应也作了分析。

Applied analysis of trilateral simply supported space grid with buckling-restrained brace

The elastic-plastic time history analysis of a rectangular planar trilateral simply-supported and one side free diagonal square pyramid grids with buckling-restrained brace was explored with the SAP2000V14.1 software.Facing the difficulty of determining the better scheme directly,further comparison index synthetic parameters——comprehensive anti-seismic value of axial force were put forward.Comparison analysis of the anti-seismic effect of 9 replacement schemes of buckling-restrained brace in the dynamic process was carried out using this method,and then a replacement scheme of the optimal solution was obtained,providing reference for the energy dissipation and anti-seismic design of grid structure of this kind in the future.The analysis of dynamic response in different parts of the structure was also made.