连梁保险丝非线性仿真分析

Nonlinear Simulation Analysis of Coupling Beam Fuse

连梁保险丝通常设置在联肢剪力墙中,在强震时通过其屈服耗散地震能量,震后方便对受损的连梁保险丝进行修复或更换。本文研发了一种新型的连梁保险丝,即在低屈服点工字型钢的腹板开设菱形空洞,增大保险丝的屈服区域。首先对其进行了材料性能试验,然后基于ABAQUS有限元程序,建立了连梁保险丝的实体有限元模型,对其进行了精细仿真分析。计算结果与试验结果对比表明,计算模型可以较好地模拟保险丝的变形、屈服顺序及其滞回曲线和骨架曲线。因此这种模拟方法对类似保险丝的数值模拟具有较好的借鉴意义。

Coupling beam fuses are usually set and used to dissipate seismic energy in the coupled shear wall structures under strong earthquakes. It is convenient to replace or repair the damaged fuse after earthquakes. This paper firstly develops a new kind of coupling beam fuse, i. e. , setting a rhombic hole in the web of H shaped steel, to enlarge the yield region of the fuse. The material property test of the fuse was performed in the laboratory and key material parameters were obtained. Based on the ABAQUS procedure, a solid finite model of fuse was established. The fine simulation of the fuses was conducted through cyclic loading. By comparing the computational and experimental resuhs, it was found that the simulation method can precisely predict the deformation, yield sequence, hysteretic curves, and skeleton curve of the fuse. Thus, the simulation method can be widely used to simulate similar coupling beam fuses.