【摘要】 为研究半刚性连接梁柱组合节点的抗震性能,开展了1个纯钢框架梁柱中节点、2个组合框架梁柱中节点的低周反复荷载试验。梁柱采用平齐式高强螺栓端板连接,试验采用柱顶加载模式。对试件的试验现象、变形、应变和耗能能力等进行了分析和比较。试验结果表明,组合节点相对于纯钢节点而言,由于负弯矩作用下钢筋的抗拉作用和正弯矩作用下混凝土板的抗压作用,其受弯承载力和转动刚度均有较大程度地提高;连接弯矩-转角关系的滞回曲线饱满、稳定,具有良好的耗能能力;平端板连接梁柱组合节点在反复荷载作用下具有较高的承载力和良好的延性,抗震性能良好。更多还原

【Abstract】 To study the seismic performance of semi-rigid composite beam-to-column joints, one bare steel cruciform joint and two composite cruciform joint specimens with flush end-plate connections were tested under cyclic loading applied at the top of the column. The experimental phenomenon, displacement, strain and energy dissipation of the specimen were analyzed and compared with each other. The experimental results indicate that compared with bare steel joints, composite joints have higher moment resistance capacity and rotational stiffness because of the tension action of rebar under negative moment and the compression action of concrete slab under positive moment. The hysteretic loops of the connection moment-rotation curves are stable and plumy, demonstrating that the composite joints with flush end plate connection have good moment resistance and rotational capacity under cyclic loading.更多还原