多层框架结构动力分析简化方法讨论

钢筋混凝土框架整体结构采用层间剪切模型 ,钢筋混凝土柱采用四线型恢复力模型 ,四线型恢复力模型的骨架控制点参数由M - φ非线性计算程序计算 ,编制了相应的程序IDAFF。通过IDAFF与TAT结果的差别分析认为 :规范的弹塑性动力分析的层间位移角计算结果在多遇地震作用下是偏大的 ,在罕遇地震作用下有可能偏小。

DISCUSSION ON SIMPLIFIED DYNAMIC ANALYTIC METHOD OF MULTI-STORY FRAME

A shear type model is used as the dynamic analytical model for the whole structure and a semidegrading tetralinear model with a descending branch is selected as restoring force model for the interstory columns. The parameter of the restoring force model for the interstory force model is computed by the nonlinear relation of M-φ,and the corresponding program IDAFF is developed. By analyzing the difference of the result between IDAFF and TAT,it can be concluded that:the result on rotation of inter-story displacement complied with the codes is on the high side under a minor earthquake and is possible on the low side under a major earthquake.