钢管混凝土柱与型钢梁装配式节点抗震试验

Seismic test for fabricated connection of concrete-filled steel tubular column and H-shaped steel beam

为了研究一种新型钢管混凝土柱与型钢梁装配式节点的抗震性能,对不同参数的节点进行低周往复循环加载试验.节点均经历弹性、塑性和极限破坏三个阶段,且为环板与钢梁翼缘的连接处破坏.对比分析表明:节点的轴压比越大,承载力越低;环板越宽,承载力越高;方形环板比圆形环板承载力更高;垫板对节点试件的承载力有提高作用.钢管混凝土柱与型钢梁装配式节点设计合理、传力明确、承载力高、构造简单、施工方便,是一种值得推广的组合装配式节点形式.

In order to research the seismic performance of novel fabricated connection of concrete-filled steel tubular column and H-shaped steel beam,the low-cycle cyclic loading test for the proposed connections with different parameters was performed. All fabricated connections go through three stages including the elastic stage,plastic stage and limit failure,and the failure occurs at the connection region between the annular plate and steel beam flange. The comparative analysis reveals that the greater the axial compression ratio is, the lower the bearing capacity of connections is. The wider the ring plate is,the higher the bearing capacity is. In addition,the bearing capacity of square ring plate is higher than that of circular ring plate,and the base plates can improve the bearing capacity of connection specimens. The fabricated connections of concrete-filled steel tubular column and H-shaped steel beam exhibit the reasonable design,clear force transmission,high bearing capacity,simple structure and convenient construction. Therefore,the proposed composite fabricated connections are worth to be popularized.