蜂窝门式刚架Γ形节点受力性能研究

Research on mechanical performance of honeycomb portal frame Γ-shaped node

采用ABAQUS有限元软件对12个Г形节点试件进行低周往复荷载作用下的模拟,以研究Γ形节点不同扩张比、节点连接形式、开孔距离等因素对试件的破坏形式、滞回性能、骨架曲线、刚度退化、延性性能、耗能性能、节点域承载力的影响规律,并且对其中的2个试件进行了同条件试验研究,试验结果与模拟分析结果吻合较好。结果表明：随着试件扩张比的增加,试件的承载力和刚度增大,耗能能力和延性随之降低;随着开孔距离的增加,试件的承载力和刚度增大,耗能能力和延性也增大;端板竖放试件的承载力和刚度较端板平放试件要大,但端板平放试件的延性较端板竖放试件更好。

ABAQUS finite element software was used to simulate the 12 Г-shaped node specimens under low-cycle reciprocating loading to study the impacts of different expansion ratios,node forms and opening distance on failure modes,hysteresis performance,skeleton curve,stiffness degradation,ductility performance,energy dissipation performance,and the bearing capacity of the node domain. And two of the specimens were tested in the same conditions. The experimental results were in good agreement with the simulation analysis results. The results show that with the increase of specimen expansion ratio,the bearing capacity and stiffness of the specimen increase,and the energy dissipation capacity and ductility decrease. With the increase of the opening distance,the bearing capacity and stiffness of the specimen increase and the energy dissipation consumption ability and ductility increase. The bearing capacity and stiffness of the specimens placed vertically on the end plate are larger than those placed flatly on the end plate,but the ductility is worse.