钢筋混凝土结构梁柱节点滞回性能对比分析

Comparative analysis of hysteretic behavior of beam-column joints in reinforced concrete structures

为验证装配式强化梁柱节点与传统梁柱节点在受力和抗震性能方面的区别,借助ABAQUS的非线性分析功能分别建立了传统梁柱节点和装配式强化梁柱节点有限元模型,选择了合理的参数,分析了二者的破坏形态和滞回性能。结果表明:在相同荷载作用下,传统梁柱节点模型中的部分钢筋已发生破坏,强化梁柱节点中的钢筋未破坏,只部分钢筋进入塑性变形阶段,且通过滞回曲线对比显示:强化梁柱节点曲线的包络面积明显大于传统梁柱节点,说明了装配式强化梁柱节点的耗能能力更好。装配式强化梁柱节点设计的刚度、承载力和耗能能力均优于传统梁柱节点。

In order to validate the difference between traditional and prefabricated reinforced beam-column joints in stress and seismic behavior,the finite element models of traditional and prefabricated reinforced beam-column joints are established respec-tively with the help of nonlinear analysis function of ABAQUS,and the failure modes and hysteretic behaviors of them are analyzed by selecting rationale parameters.The results show that some of the steel bars in the traditional joint model have been destroyed under the same load,while the steel bars in the strengthened joint have not been destroyed,only some of the steel bars have entered the plastic deformation stage.By comparing the hysteretic curves,it is shown that the envelope area of the strengthened joint curve is obviously larger than that of the traditional joint,which shows that the energy dissipation capacity of the strengthened joint is better.Therefore,the stiffness,bearing capacity and energy dissipation capacity of fabricated strengthened joints are superior to those of traditional joints.