钢筋混凝土梁-钢管混凝土叠合柱外加强环式节点受力性能有限元分析

FEM Analysis of the Mechanical Behavior of Steel Reinforced Concrete Column-RC Beam Composite Joint

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 seismic behaviour experiments of the joint with outer stiffening ring which connect the concrete beam and laminated steel tube column,especially the three low frequency cyclic loading tests of the joints with different strengthening length,the mechanical behaviour of the strengthening rings were evaluated using the nonlinear FEM method with Force and displacement convergence criterion and Newton-Raphson＇s balance iteration method.The load-displacement hysteretic curves of the rings were compared and parameter analysis was conducted.The influences of the length of the outer strengthening rings and the axial compression ratio of the column to the mechanical behaviour of the joints were also studied so as to design a high-performance joint of the steel-concrete composite structure.