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外包钢-混凝土组合梁是一种新型组合梁,在负弯矩作用下具有良好的工作性能,其与柱连接节点的构造还有待合理设计并试验验证。设计了1个外包钢-梁与钢筋混凝土柱的连接节点和1个外包钢-混凝土组合梁与钢管混凝土柱的连接节点,并对其进行了低周反复荷载作用下的试验研究。对节点的破坏形态、滞回曲线、强度、延性和钢筋、钢板的应变等性能进行了分析。试验结果表明:通过合理的构造措施,外包钢-混凝土组合梁-柱的连接节点具有较强的受剪承载力、较好的延性和耗能能力,能够满足工程要求。
The clad-steel-concrete composite beam is a new kind of composite beam, which has good working performance under the negative bending moment. The structure of the connecting node with the column needs to be rationally designed and tested. The connection node of one steel-concrete-filled beam-reinforced concrete column and the connection node of one steel-encased concrete-composite concrete-filled steel tube and concrete-filled steel tubular column are designed and tested under cyclic loading. The damage morphology, hysteresis curve, strength, ductility and steel bar strain of the joints were analyzed. The test results show that the connecting nodes of the steel-concrete composite beam-column with strong shear capacity, good ductility and energy dissipation capacity can meet the engineering requirements through reasonable structural measures.