不同肢长异型柱框架结构弹塑性时程分析

为提高异型柱框架结构的抗震性能，笔者利用DRAIN-2DX程序，对长肢、底层长肢异型柱框架以及普通异型柱框架分别进行了弹塑性时程地震反应计算，较系统地分析了肢长的变化对结构整体地震反应的影响，为合理确定长肢异型柱的设计参数提供了数值分析依据．得出增大薄弱层异型柱肢长能够显著提高异型柱框架结构的抗震性能的结论．底层长肢异型柱框架能有效地克服了普通异型柱框架底层的薄弱现象；各层层间位移分布更为均匀，有利于抗震；对控制各层位移比普通异型柱框架更为有效．

Nonlinear Dynamic Analysis of R.C.Frame with Special-shaped Columns with Different Flange

In order to improve the special-shaped column frame structure's earthquake-bearing ability,DRAIN-2DX program is used in this paper to calculate the nonlinear dynamic character of the RC frame with long-flange columns,long-flange columns only in the bottom and common special-shaped columns.Then by numbers,the length of the flange change's effects on the whole structure's reaction to an earthquake will be analyzed to provide evidence for choosing the correct design static of R.C.frame with long-flange columns.The conclusion is that lengthening the flange of the special-shaped column in the bottom can really improve the earthquake-bearing ability of the special-shaped column frame structure,and the special-shaped column frame of long-flange columns only in the bottom can get rid off the disadvantages of the common special-shaped column frame.The inter-bedded displacement is more reasonable to bear the earthquake and it is more efficient to control the displacement.