【摘要】 进行了钢管混凝土(CFST)柱—钢筋混凝土(RC)环扁梁节点的静载和低周反复荷载试验,分析了节点的破坏形态、延性、耗能能力等性能。试验结果表明,钢管混凝土核心区未发生屈服破坏情况;对于静载,塑性铰产生于扁梁和环扁梁交界处,对于低周反复荷载,塑性铰产生于环扁梁上;环扁梁与钢管混凝土柱间未发现明显滑移现象。节点连接可靠,具有较好的延性以及耗能能力,能够满足延性抗震设计要求。更多还原

【Abstract】 Based on the experiments of concrete filled steel tubular(CFST) column-reinforced concrete ring flat beam Joints under static loading and quasi-static cyclic loading,the failure pattern,ductility and energy-dissipation capacity of the joints were analyzed.The test results reveal that the joint core of CFST columns is integral;for the static loading test,the plastic hinges appear at the interface between ring flat beams and flat beams,and for the quasi-static cyclic loading test,the plastic hinges appear at ring flat beams;the slippage between ring flat beams and CFST columns can be ignored;the internal forces of flat beams can be transformed into CFST columns efficiently.This kind of joints has better ductility,energy-dissipation capacity,and can meet the requirements of ductile seismic resistant design.更多还原