钢管再生混凝土柱-钢梁框架边节点恢复力模型研究

Study on Restoring Force Model of Joints in the Composite Frame with Recycled Concrete-filled Steel Tubular Column and Steel Beam

通过对2个矩形钢管再生混凝土柱-工字型钢梁框架边节点在低周反复荷载下进行的拟静力试验,分析了不同再生骨料取代率对节点抗震性能的影响,建立了该种类型节点的恢复力模型。研究结果表明,该类型节点滞回曲线饱满,拥有较好的抗震性能;不同再生骨料取代率对试件特征点的荷载影响不大,说明再生骨料取代率对节点抗震性能影响较小;建立的恢复力模型骨架曲线和滞回曲线与试验实测的具有较高的吻合度,可供矩形钢管再生混凝土柱-工字型钢梁框架结构的弹塑性地震反应分析参考;矩形钢管再生混凝土柱-工字型钢梁框架边节点具有良好的抗震性能,可以在高烈度抗震设防区域中的高层建筑中推广使用。

The seismic performance of the joints with different recycled aggregate replacement rations is analyzed and the restoring force model of the combined joints is established through the pseudo statics of 2specimens under low cyclic loading,in which the joints are in the composite frame with recycled concrete-filled steel tubular column and steel beam.The results show that all the hysteretic curves are plump,the seismic performance is very good.Different recycled aggregate replacement rations have little influence on load featured points,which indicates that the different recycled aggregate replacement rations have less influence on the seismic performance of the joints.The hysteretic curves and skeleton curves of the recommended restoring force model is in good agreement with the test one and this gives a reference to the elastic-plastic analysis of frame structure composed by joints in the composite frame with rectangular recycled concrete-filled steel tubular column and I-section steel beam.Since the joints in the composite frame with rectangular recycled concrete-filled steel tubular column and I-section steel beam has excellent seismic performance,it can be adopted in high-rise buildings in high-risk seismic zones.