异形与矩形截面框架柱抗震性能分析

为研究平面不规则异形柱框架结构的抗震性能，本文以实际工程为背景，按照等刚度原则建立异形柱框架与矩形柱框架结构计算模型。运用PKPM有限元程序对计算模型进行弹性及弹塑性静力计算分析，从而计算出两种结构的弹性位移、扭转系数及结构的抗倒塌性能等结构抗震性能指标。结果表明，L型平面不规则异形柱框架结构在7度（0.15g）抗震烈度 、 及高度超限的情况下仍然具有较好的抗震性能，且优于等刚度矩形柱框架结构。

A Comparison of seismic behavior between specially shaped and rectangular cross section column frame structure

In order to research the seismic behavior of specially shaped columns frame structure of L-shape,this paper establishes specially shaped and same stiffness rectangular column frame structure model based on an actual project.This paper used PKPM software to calculate the models of elastic and elastic-plastic behavior and to get the elastic displacement,tensional coefficient and the collapse of the performance of the structures.The results showed that specially shaped columns frame structure of L-shape had a good seismic behavior under 7 degrees(0.15g) ground,also were better than the rectangular column frame structure seismic behavior.