开孔三重钢管防屈曲耗能支撑有限元分析

 开孔式三重钢管防屈曲耗能支撑是一种性能良好的耗能减震构件，本文介绍了开孔式三重钢管防屈曲耗能支撑的构造，设计了10组不同开孔形式和尺寸的三重钢管防屈曲耗能支撑构件，并采用ANSYS及ABAQUS软件对其进行有限元分析，研究不同开孔及间隙对此种防屈曲耗能支撑滞回耗能性能以及承载力的影响。研究表明：开孔式三重钢管防屈曲支撑的滞回性能稳定、耗能能力强、屈服点发生在预设区域；开孔形式和孔长对防屈曲支撑的性能有影响；开孔式三重钢管防屈曲耗能支撑套箍效应明显低于不开孔三重钢管防屈曲耗能支撑；当间隙不为0时，芯材管开孔后支撑的承载力并没有下降。

Finite Element Analysis of Perforating Triple-Steel Tube Buckling-Restrained Brace

The perforating triple steel tube buckling restrained brace is an energy damping device with the good performance. The structure of the triple steel tube buckling restrained brace is introduced in this paper. In order to research the carrying capacity and hysteretic energy performance of the perforating triple steel tube buckling restrained brace for different perforating types and gaps, ten different perforating types and sizes are designed to carry out a FEM analysis with softwares ANSYS and ABAQUS. The perforating triple steel tube buckling restrained brace shows a stable hysteretic function and higher energy dissipation capacity, with the yielding point in the setting area. The perforating form and size influence the functions of the perforating triple steel tube buckling restrained brace. The“confinement” effect of perforating triple steel tube buckling restrained brace is significantly lower than that of traditional triple steel tube buckling restrained brace. The carrying capacity of BRB does not reduce when the gap is not zero.