带偏心钢支承钢筋砼框架动力反应

摘要

用动力分析软件对带偏心钢支撑钢筋砼二层框架结构进行了分析，单元模型建立时考虑了材料非线性和轴力与弯矩的相互作用.钢筋砼模型为三折线，钢支撑用非对称双线性模型.从地震动作用下的地震反应知，X-型支撑和K-型支撑有较小的位移、速度和柱剪力.偏心支撑框架有2个途径传递地震反应：柱和支撑与梁.%Two-story frame structures,which are braced with eccentric steel brace,are analyzed with dynamic program.The element models are created depending on the nonlinear behavior of the material and the interaction between the axial force and the moment.The reinforced concrete model is a tri-linear curve and the steel brace is a non-symmetry bi-linear model.From the dynamic response under ground motion wave it is known that the X-type or K-type braced frame has smaller displacement,velocity and column shear.The eccentrically braced frame has two approaches to transfer the seismic action:column and brace with beam.