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Ⅰ形和H形等传统配钢形式不能对核心混凝土提供足够约束,型钢混凝土(SRC)柱的抗震性能因此较普通钢筋混凝土柱提高不多,其在高地震烈度区的应用受到限制,作者在此背景下提出两种新型截面型钢混凝土柱。基于ABAQUS工作平台,建立已完成的5个新型柱试验试件的数值分析模型,对其进行循环往复荷载作用下的全过程分析,并将试件的数值计算结果与试验结果进行对比分析,讨论滞回曲线、骨架曲线和型钢应力状态等的对比结果,模拟计算与试验结果吻合较好。在此基础上,分析轴压比、混凝土强度和箍筋间距对柱抗震性能的影响,并研究新型柱在不同抗震等级下的设计轴压比限值,所提建议数值可供规范修订和工程计算参考。
The traditional steel forms, such as I-shape and H-shape, can not provide enough restraint to the core concrete. Therefore, the seismic performance of the SRC columns is not much improved compared with ordinary reinforced concrete columns, and its application in high seismic intensity areas is limited. In this context, two new type of section steel concrete columns are proposed. Based on the ABAQUS working platform, a numerical analysis model of five new column test specimens has been established, and the whole process of cyclic loading under cyclic loading has been established. The numerical results of the specimen are compared with the test results, Hysteresis curve, the skeleton curve and the stress state of the section steel, the simulation results are in good agreement with the experimental results. Based on this, the influence of axial compression ratio, concrete strength and stirrup spacing on column seismic performance is analyzed and the design axial compression ratio limits of the new type columns under different seismic levels are studied. The proposed numerical values can be used for the revision of the code and engineering Calculation reference.