二重钢管防屈曲支撑的性能研究

Study on the Performance of Double-steel Tube Buckling-restrained Brace

设计了两种二重钢管防屈曲耗能支撑试件,对其进行了性能试验,研究了这两种防屈曲耗能支撑的受力过程和耗能机理、约束单元钢管与核心单元钢管之间的间隙对支撑性能的影响,对比分析了这两种类型防屈曲耗能支撑的能量耗散系数和等效粘滞阻尼比,用ABAQUS有限元软件对这两种防屈曲耗能支撑进行了数值模拟并和试验结果进行了对比分析。研究结果表明:二重钢管防屈曲耗能支撑滞回曲线饱满,对称性、规律性、稳定性好,耗能能力强。

Two kind of double-steel tube buckling-restrained brace were developed and conducted on static cyclic tests. The loading process and energy dissipation mechanism of these two kinds of buckling-restrained brace were studied, the effect of the gaps which are between restrain unit steel tube and core-unit steel tube on the performance of braces were analyzed, moreover,the energy dissipation coefficient and equivalent viscous damping ratio of those two kinds of brace were compared to each other, In addition, the numerical simulation using finite element software ABAQUS is compared to the experimental result between the two BRBs. The results show that： the hysteretic curves of double-steel tube buckling-restrained brace are plump which show favorable symmetry, regularity and stability that demonstrate the strong energy-dissipating capacity of the double-steel tube buckling-restrained brace.