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数值分析与建模是进行钢筋混凝土结构抗震性能研究的重要手段。为了保证钢筋混凝土结构数值建模的可靠性,本文以钢筋混凝土柱的拟静力试验为基础,在ABAQUS中对其进行基于纤维杆件单元非线性有限元模拟。考虑材料本构模型对结构数值模拟结果的影响,对两个拟静力试验柱分别建立了6个数值分析模型,计算结果表明:在选用合理混凝土与钢筋本构模型的条件下,纤维单元模型能够有效的模拟钢筋混凝土的滞回性能;在数值建模过程中可以忽略混凝土的抗拉强度;Kent-Scott-Park约束本构模型与Mander约束本构模型均能有效的模拟箍筋对混凝土的约束效应;相比于混凝土的本构模型,钢筋本构模型对模拟结果的影响更大,有必要对现有钢筋的本构模型进行更为细致全面的研究。
Numerical analysis and modeling are important means to study the seismic behavior of reinforced concrete structures. In order to ensure the reliability of the numerical modeling of reinforced concrete structures, this paper, based on the quasi-static test of reinforced concrete columns, is simulated in ABAQUS by nonlinear finite element method. Considering the effect of the material constitutive model on the numerical results of the structure, six numerical analysis models are established respectively for the two quasi-static test columns. The calculation results show that under the condition of choosing reasonable concrete and steel constitutive model, the fiber unit model Which can effectively simulate the hysteretic behavior of reinforced concrete; the tensile strength of concrete can be neglected in the numerical modeling process; both Kent-Scott-Park constitutive model and Mander constrained constitutive model can effectively simulate the effect of stirrups on concrete Compared with the constitutive model of concrete, the constitutive model of reinforced concrete has a greater influence on the simulation results. It is necessary to study the constitutive model of existing reinforced concretely more comprehensively.