【摘要】 为了研究损伤方钢管混凝土结构加固后的抗震性能,基于一榀三层两跨的损伤方钢管混凝土框架加固后的拟静力试验,分析了反复水平荷载作用下框架的滞回性能,并根据滞回曲线进一步得出了框架顶层骨架曲线及相应的恢复力模型,研究了钢管混凝土框架的延性、强度与刚度的退化等性能。采用非线性有限元分析方法,将恢复力模型应用到混凝土弹性模量退化方程中,并对试验进行了数值模拟。结果表明:理论分析结果与试验结果吻合较好。更多还原

【Abstract】 In order to study the aseismic behavior of concrete-filled rectangular tubular repaired structure, the hysteretic behavior under cyclic loading is analyzed based on a quasi-static test of a two-span, three-storey concrete-filled rectangular steel tubular repaired frame (CRSTRF). Based on the hysteretic curve, the top layer framework curve and the corresponding resilience model are obtained. The ductility characteristics, stiffness and strength degeneration are studied. Nonlinear finite element method is adopted in applying the resilience model to the degeneration equation of concrete elastic module and the numerical simulation of the test is carried out. The results show that a good agreement is reached between the theoretical analysis and available experimental results.更多还原