【摘要】 为了研究内隔板式方钢管混凝土柱-钢筋混凝土梁节点的力学性能,完成了3个1∶2比例的内隔板式方钢管混凝土柱-钢筋混凝土梁节点模型试件低周反复试验。研究表明该节点具有较高的承载力和刚度,钢筋与钢牛腿的焊接连接可靠,并能有效地把应力传递到钢牛腿,钢牛腿能有效地传递梁端弯矩;试件破坏发生在钢牛腿外梁截面处,呈现出延性破坏特点;节点延性系数介于3~5,承载力在达到最大值后缓慢下降,节点具有较好的变形能力,满足"强柱弱梁,节点更强"的抗震设计原则。更多还原

【Abstract】 To study the mechanical behavior of square concrete filled steel tube (SCFST) column-reinforced concrete(RC) beam joints strengthened by inner diaphragms,three 1∶2 model specimens were tested under cycling loading.The results show that the SCFST column-RC beam joint can provide much higher bearing capacity and rigidity.The weld connection between reinforcing bars and steel corbel is reliable and the stresses can be effectively transferred to steel corbel.The moments at the end of the RC beam can be transferred by steel corbels effectively and ductile failure was found at the cross section outside the steel corbel.The ductile coefficients of the three specimens were between 3 and 5.The load decreased slowly after it reached the limited bearing capacity and the joints held good deformability.The seismic design requirements,strong column-weak beam and stronger joints,can be met.更多还原