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该文以方形钢管混凝土柱—H型钢梁全螺栓隔板贯通连接节点为研究对象,以梁偏心为参数,进行了2个足尺的节点试件SJ1和SJ2的低周往复荷载试验,研究了该类型节点的破坏机理与抗震性能。通过试验数据处理与分析得出了该节点类型的破坏机理、滞回曲线、骨架曲线、延性系数、耗能能力及刚度变化规律;通过隔板应变分析验证了试件的破坏机理。试验结果表明:该类型节点具有很好的抗震性能,节点承载力高,滞回曲线饱满,延性系数较大,耗能能力强等特点;主要变形发生在梁端塑性铰区域,隔板与柱连接处容易出现应力集中现象。两组节点在设计时均考虑了抗震设计要求,破坏形式基本相同,以隔板端部梁翼缘及腹板屈曲破坏为主,但由于SJ2梁存在偏心,在荷载作用下节点下隔板与柱连接处被撕裂。
In this paper, a square tubular concrete column-H beam full bolt diaphragms through the connection node for the study, the beam eccentricity as a parameter, the two full-scale joint specimens SJ1 and SJ2 low cycle reciprocating load test study The failure mechanism and seismic performance of this type of nodes are studied. The failure mechanism, hysteresis curve, skeletal curve, ductility coefficient, energy dissipation capacity and stiffness variation of this type of joint were obtained through experimental data processing and analysis. The failure mechanism of the specimen was verified by strain analysis of diaphragm. The results show that this type of joint has very good anti-seismic performance, high bearing capacity, full hysteretic curve, large ductility coefficient and strong energy dissipation. The main deformation occurs in the plastic hinge region at the beam end, The junction is prone to stress concentration. In the design of the two groups of nodes, the seismic design requirements are all considered. The damage forms are basically the same. The buckling of the flanges and the webs of the end beams of the bulkheads are mainly based on the buckling failure. However, due to the eccentricity of the SJ2 beams, Department was torn.