新型钢结构模块单元柱节点抗震性能分析

Seismic behavior analysis of new steel structure module unit column joints

为了使钢结构模块化建筑能够适用于中高层建筑,需要对模块单元柱节点构造进行改进。根据钢结构模块单元柱的连接特点,提出了一种适用于中高层模块化建筑的新型钢结构模块单元柱节点构造方法,并采用有限元模拟方法,以腋角、地板梁与顶板梁刚度比、梁柱强度比等为设计参数,对新型钢结构模块单元柱节点的抗震性能进行模拟分析。分析结果表明,新型钢结构模块单元柱节点的初始刚度及延性系数随着梁柱强度比的降低而增大,地板梁与顶板梁刚度比等于1,或设置腋角的钢结构模块单元节点具有较好的抗震性能。新型钢结构模块单元柱节点在循环荷载作用下均是模块梁上、下翼缘发生破坏,符合“强柱弱梁”的设计要求。

In order to make the steel modular building suitable for middle and high buildings,it is necessary to improve the modular element column joint structure.According to the characteristics of the steel structure module unit column connection,the paper proposes a new type of steel structure module unit column joint which can be suitable for middle and high-rise modular buildings.The axillary angle,rigidity ratio of floor beam to roof beam,and strength ratio of beam to column are taken as design parameters,the seismic behavior of the new steel structure module unit column joint is analyzed by using finite element method.The analysis results show that the initial stiffness and ductility coefficient of the new type of steel structure module unit column joint increase with the decrease of the beam-column strength ratio,and when the stiffness ratio of the floor beam and the roof beam is equal to 1,the steel structure module unit joint of the axillary angle has good seismic behavior.Under cyclic loading,the upper and lower flanges of the module beam are destroyed in the module unit column joint,which meets the design requirements of"strong column and weak beam".