【摘要】 为考察BRBF结构的层间位移与层剪力的对应关系及塑性铰分布情况,文中以BRBF为研究对象,以屈曲约束支撑的水平力分担率β以及框架强度CB等主要研究参数建立6个模型,通过二阶非线性计算程序,对模型进行弹塑性静力分析。结果表明:屈曲约束支撑的水平力分担率30%～60%的模型的层间变形中低层集中,屈曲约束支撑的水平力分担率90%的模型的层间变形低层集中;模型的层间集中变形以及塑性铰分布情况不受框架强度影响。更多还原

【Abstract】 The six FEM models of the buckling restrained brace of multi-storey steel frame with different horizontal force sharing rate β of buckling restrained brace and the frame strength CB were established to conduct the elastic-plastic static analysis considering the secondary nonlinear effect.The main objective of this study is to investigate the relationship between storey displacements and shear stress and the distribution of plastic hinge in different models.The comparative study showed that the deformations mainly occur in the middle and low parts of the frame of the models,which the horizontal force sharing rates of the buckling restrained braces are from 30% to 60%;while,for the models with the horizontal force sharing rates of 90%,the deformations mainly occur in the low parts of the frame;the storey-concentrated deformation and the distribution of plastic hinge are not affected by the frame strength.更多还原