高强钢筋高强混凝土空间边节点抗震性能研究

Seismic performance of high strength reinforced and concrete space exterior mid-edge joints

为了研究高强钢筋高强混凝土带板空间边节点的抗震性能,采用有限元分析软件ABAQUS,对17个高强钢筋高强混凝土空间边节点进行分析,得到各个试件的滞回曲线和骨架曲线,研究了轴压比、现浇楼板厚度、节点核心区配箍率对高强带板空间节点骨架曲线、延性、耗能和承载力的影响规律。结果表明:由于现浇楼板的存在,空间节点受到明显的扭转约束作用,试件的骨架曲线正反向出现明显的不对称性,通过对轴压比、现浇楼板厚度、核心配箍率等影响因素的合理控制可以提高该类节点的承载能力和极限变形性能。

In order to study the seismic behavior of high-strength concrete spatial edge joints with high-strength steel bars,using finite element analysis software ABAQUS,17 high-strength reinforced high-strength concrete spatial side joints are analyzed,and the hysteretic curves and skeleton curves of each specimen are obtained.The effects of axial compression ratio,cast-in-place floor thickness and stirrup ratio in the core area of joints on skeleton curves,ductility,energy dissipation and bearing capacity of high-strength spatial joints with plates are studied.The results show that due to the existence of cast-in-place floor slab,the spatial joints are subjected to obvious torsional constraint,and the skeleton curve of the specimen appears obvious asymmetry in both positive and negative directions.By reasonably controlling the influencing factors such as axial compression ratio,cast-in-place floor slab thickness and core stirrup ratio,the bearing capacity and ultimate deformation performance of this kind of joints can be improved.