动力荷载下传统风格建筑双梁-柱节点抗震性能试验研究

为研究传统风格建筑混凝土双梁-柱节点的破坏特征及抗震性能,进行了2个节点试件的动力循环加载试验,包括一个典型传统风格建筑混凝土双梁-柱节点和一个单梁-柱节点.观察了节点试件的受力过程及破坏特征,研究了试件的荷载-位移滞回曲线、骨架曲线、承载能力、刚度及承载力退化、延性和耗能能力,并对其破坏模式进行了分析.研究结果表明:...

Experimental research on the seismic performance of dual-lintel column joints in traditional style buildings under dynamic loading

In order to research the seismic performance and failure characteristics of dual-lintel column joints in traditional style buildings,two joint specimens are tested under dynamic cyclic loading,including a typical dual-lintel column joint and a single-lintel column joint.The failure process and characteristics are obtained.The hysteretic loops,skeleton curves,bearing capacity,degradation of strength and stiffness,ductility,energy dissipation and failure modes of the joints are analyzed.The results show that the bearing capacity and stiffness of the dual-lintel column joint are higher than those of the single-lintel column joint.However,the energy dissipation and ductility of the dual-lintel column joint are slightly smaller than those of the single-lintel column joint.The regularity of rigidity degeneration for the joints is basically the same.Generally,the dual-lintel column joint in traditional style buildings has better deformability and energy dissipation,showing better seismic performance.Based on the experimental research,the nonlinear numerical simulation of dual-lintel column joints in traditional style buildings is developed by the ABAQUS software.The influence of axial compression ratio,concrete strength and spacing between dual lintels on the joints is studied.It is shown that the bearing capacity of the models increases with the increment of concrete strength and spacing between dual lintels.In addition,the bearing capacity of the models improves,but the ductility decreases with the increment of the axial compression ratio.And the ductility of the models decreases with a larger concrete strength.