缀板式钢管混凝土组合柱框架有限元分析

为研究缀板式方钢管混凝土组合柱框架的抗震耗能能力,基于三榀框架试验所验证的有限元模型,在不改变材料本构及各不同构件的参数设置,采用ABAQUS有限元软件建立不同构造形式的框架模型,通过有限元软件得到框架的应力云图及荷载-位移曲线,研究框架在低周水平往复荷载作用下滞回性能。模拟结果表明,不同构造形式下框架钢梁发生了屈曲扭转、底部柱子在大位移时发生压弯、肋板连接处所受应力较大,破坏机制符合强柱弱梁,具有良好的滞回性能,为以后实际工程中提供可参考依据。

NUMERICAL STUDY ON FINITE ELEMENT OF CONCRETE-FILLED STEEL TUBULAR COMPOSITE COLUMN FRAME WITH SPLIT-PLATE

In order to study the seismic energy dissipation capacity of concrete-filled square steel tubular columns of braced frame system,the finite element models are established using ABAQUS software based on the frame testing results.The models feature different construction forms without changing the material constitution and the parameter of different components.Furthermore,the stress nephogram and load displacement curve are obtained to study the hysteretic behavior of the frame under low cycle horizontal reciprocating load.The results show that under different structural forms,the steel beams have buckling torsion,and the bottom column has compression bending under large displacement;The stress at the joint of rib plank is large,and the failure mechanism meets the requirements of strong column and weak beam,which has good hysteretic performance.The present research may provide reference for future practical engineering.