SC梁与CCSHRC柱端板螺栓连接节点试验

摘要

In order to validate mechanical property and seismic behavior of the steel and concrete composite beams (SC beam)with continuous compound spiral hoop reinforced concrete column (CCSHRC)node,the low cyclic loading tests of full scale end plate bolted connection node of SC beam and CCSHRC column specimen were carried out.Seismic shear bearing capacity of node was analyzed.Meanwhile,the formulae of seismic shear bearing capacity of joint core were obtained according to the experiment results. Results show that combined node force is reasonable,and the clear plastic hinge is formed at beam end before failure,at the same time due to the presence of high strength bolt preloading and steel plate hoop constraint function,the core concrete is in complex stress state,the seismic shear bearing capacity is improved significantly, the seismic shear capacity of the node domain is greatly improved,and the stiffness of node is increased.The formulae of seisimic shear bearing capacity can be used for reference in the practical engineering.%为了验证钢与混凝土组合梁（SC 梁）与高强复合连续螺旋箍约束钢筋混凝土柱（CCSHRC柱）节点的受力机理及抗震性能，对足尺的端板螺栓连接的SC 梁与CCSHRC 柱节点试件进行了低周反复荷载试验，对节点的抗震受剪承载力进行了分析，并根据试验结果得到了节点核心区抗震受剪承载力的计算公式。结果表明：组合节点受力合理，破坏前梁端形成明显的塑性铰，同时由于高强螺栓预压力的存在以及钢板箍的约束作用，使得核心区混凝土处于三轴受压应力状态，抗震受剪承载力显著提高，大大改善了节点区的抗剪能力，同时也增大了节点的刚度，所得抗震受剪承载力的计算公式可供实际工程参考。