基于OpenSees的屈曲约束支撑混凝土框架抗震性能分析

Seismic Performance of Buckling Restrained Brace Concrete Frame Based on OpenSees

通过有限元软件OpenSees对采用了T型钢锚固型节点的一个两层三跨屈曲约束支撑混凝土框架进行了模拟,并与试验结果对比,来验证模拟结果的准确性。在此基础上,对试验框架的原屈曲约束支撑结构体系进行抗震性能分析。结果表明:有限元分析结果与试验结果吻合良好,OpenSees可以准确的模拟屈曲约束支撑混凝土框架的受力性能;屈曲约束支撑混凝土框架具有良好的耗能性与水平承载力;屈曲约束支撑框架体系具有较好的抗震性能;屈曲约束支撑能够增加结构体系的侧向刚度,有效控制结构变形。

OpenSees software was used to simulate a two-story three-span buckling restrained brace concrete frame(BRBCF)that adopts an anchoring connection joint with a T-stub,and the simulated results were compared with the test results to verify the accuracy of the model.The seismic behavior of the original BRBCF of the test frame was then analyzed.Good agreement between the numerical and experimental results was obtained,and OpenSees could accurately simulate the seismic performance of BRBCFs.The BRBCF showed good energy dissipation and horizontal bearing capacity,and the buckling restrained braced frame system revealed favorable seismic performance by increasing the lateral stiffness of the structural system and effectively controlling the deformation of the structure.