单边高强螺栓连接方套方中空夹层钢管混凝土柱组合节点抗震性能试验研究

为了深入研究单边高强螺栓连接中空夹层钢管混凝土柱组合节点的抗震性能和破坏机理,对4个方套方中空夹层钢管混凝土柱与钢-混凝土组合梁单边高强螺栓端板连接节点进行了低周反复加载试验,以端板形式和柱截面空心率为主要试验参数,考察了节点破坏模式和组合楼板裂缝分布规律,研究节点滞回曲线、连接弯矩-转角关系、刚度和承载力退化、延性和...

Experimental study on seismic performance of concrete-filled double steel tubular column composite connections with high strength blind bolts

To investigate the seismic behavior and failure mechanism of concrete-filled double steel tubular (CFDST) column composite connections with high strength blind bolts, four cruciform joints were tested under lateral low cyclic loading. The test parameters were end plate type and sectional hollow ratio of column. The failure modes of joints and crack patterns of composite slabs were investigated. The hysteresis curves, moment-rotation relationship, degradations of stiffness and strength, ductility as well as energy dissipation capacity were also analyzed. The failure mechanism of the joints was discussed in detail by analyzing the strain distributions of the end plates, steel beams and joint cores. The experimental results indicate that the blind bolted connections between CFDST columns and composite beams have excellent seismic performance and good ductility, and are therefore safe and reliable. And it’s suitable for applications in high-intensity earthquake areas.