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中文摘要：
进行6个核心型钢混凝土（CSRC）柱试件的轴压性能试验,并利用有限元分析软件对试件进行非线性全过程数值模拟.研究配置核心型钢和不同配箍特征,及其对混凝土柱轴心抗压承载力和轴向变形性能的影响.试验结果表明,设置配钢率为2.88%的核心型钢,试件的轴压强度可提高约30%,轴向变形能力可提高约1倍.增加试件体积配箍率,可有效提高试件的轴向变形能力并改变试件的脆性剪切破坏形态为整体压溃.把试件截面混凝土划分成约束区与非约束区,采用不同的混凝土本构建立有限元模型,ANSYS分析结果与试验结果对比分析表明,程序计算结果与试验结果吻合较好.
英文摘要：
Six core steel reinforced concrete （CSRC） columns are tested under axial compression, and a nonlinear numerical analysis simulating the whole test process is carried out by the finite element analysis software ANSYS. The effect of core steel and transverse reinforcement to the axial strength and axial deformation capacity are investigated. The test results indicate that axial strength of the specimens is increased by 30% approximately and the axial deformation capacity almost doubles when the ratio of the core steel area to the section area is 2. 88 %. Increasing the volume ratio of stirrups can effectively increase the axial deformation capacity and the brittle shear failure modes of the specimens can also be changed into a ductile integral failure mode. The sections of the specimens are divided into constrained region and unconstrained region with different constitutive relations of concrete to establish the numerical mode. The results of calculation agree well with the test results.
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