高含钢率钢骨混凝土柱的滞回数值分析

摘要

SRC members with high steel ratio possess high load-carrying capacities and significant ductility, which is fully used in high-rise buildings and complex buildings.Finite element analysis is an effective method for investigating the performance of composite columns,but the results of numerical simulation do not agree with test results well,if the confinement of concrete,the damage of concrete and the cyclic hardening of steel under cyclic loading are neglected.Considering the influence of the changes of material,this paper proposed an analysis model for numerical simulation of composite columns by ABAQUS,and the accuracy was verified by contrast between the result of numerical simulation and test.The influence of material changes on numerical analysis of composite columns under cyclic loading were also discussed.%高含钢率钢骨混凝土（SRC）构件具有良好的承载能力和延性，在高层和复杂结构中多有应用，为了更为准确、全面地把握钢骨混凝土柱的受力性能，对其进行有限元数值模拟是一种行之有效的方法。但是采用传统的材料本构模型进行数值模拟，往往会忽略 SRC 构件中混凝土受到约束作用而产生的强度和延性的提高，忽略混凝土在反复荷载条件下的损伤以及钢材在反复荷载作用下的循环硬化，因此有限元结果与试验结果会存在较大差异。为此，将以上因素考虑在内，提出了适用于反复荷载条件下的钢骨混凝土材料本构，通过 ABAQUS 数值模拟与试验对比，验证了有限元模拟高含钢率钢骨混凝土柱滞回性能的准确性，并从材料层次分析探讨了混凝土在约束、损伤的性能变化和钢材在反复荷载条件下力学性能的变化对数值模拟结果的影响。