摘要
为研究摇摆防屈曲支撑钢框架抗震性能,采用Open Sees有限元软件,基于防屈曲支撑钢框架(BRBSF)和摇摆防屈曲支撑钢框架(RBRBSF)拟静力试验建立试验框架数值模型,采用多细分基于刚度法的梁柱单元模拟钢梁与钢柱,梁端削弱截面处用零长度截面单元模拟塑性铰出现,并采用缝(Gap)单元与桁架(Truss)单元模拟摇摆柱脚,对比模拟结果与试验结果,验证模型正确性,并进一步分析RBRBSF响应,结果表明:模型能准确预测BRBSF和RBRBSF抗震性能,摇摆柱脚可减轻主体框架损伤风险。
In order to study the performance of the rocking buckling-restrained braced steel frame,a numerical simulation model is established based on the pseudo-static test of buckling-restrained braced steel frame( BRBSF) and rocking buckling-restrained braced steel frame( RBRBSF) using Open Sees,the steel beam and steel column are modeled by thedispbeamcolumn element with multidivisional,the plastic hinge is simulated with a zerolengthsection element at the reduced beam section,and the Gap element and the Truss element are used to simulate the rocking column foot,the correctness of the model are verified by comparing the simulation results and the experimental results,and the responses of the RBRBSF are further analyzed. The research shows that the model can accurately predict the seismic performance of BRBSF and RBRBSF,the rocking column foot can reduce the damage risk of the main frame.
引文
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