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基于实际设计中对采用外加强环式的钢筋砼梁-钢管砼叠合柱节点的抗震性能试验,以3个不同外加强环长度的中柱平面节点为基础并进行的低周反复荷载试验,结合位移与力同时收敛的准则,并应用牛顿-拉夫逊平衡迭代法对该节点加固方法利用非线性有限元方法进行受力性能分析。对节点的荷载-位移滞回曲线进行比较,并对外加强环进行参数分析,研究了外加强环的长度和柱轴压比对节点受力性能的影响,以期设计出能广泛应用到工程实际中“强柱弱梁”概念的砼梁-型钢混凝土叠合柱节点。
Based on the tests of the seismic performance of the reinforced concrete beam-steel tubular composite column joints with the external reinforcement ring in the actual design, the low-cycle cyclic loading test was carried out based on the three center-column plane nodes with different external reinforcing ring lengths. Based on the criterion of simultaneous convergence of displacement and force, a new finite element method was used to analyze the mechanical behavior of the method of strengthening the joint by Newton-Raphson equilibrium iteration method. The load-displacement hysteretic curves of the joints are compared and the parameters of the outer reinforcement ring are analyzed. The influence of the length of the outer reinforcement ring and axial compression ratio on the mechanical behavior of the joints is studied. “Strong column weak beam ” concept of concrete beam - steel reinforced concrete column node.