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该文深入研究了箍筋约束混凝土单轴滞回本构模型,并利用ABAQUS二次开发功能对6种典型的模型进行计算分析。通过各模型计算结果与试验结果的比较以及各模型之间的比较,从受压骨架曲线,受压滞回曲线,受拉滞回曲线3个方面,研究了各模型的准确性和计算效率。在对比分析的基础上,建立了一个与实验符合较好、且考虑复杂加载路径的混凝土单轴滞回实用本构模型。该模型受压骨架曲线采用Mander模型,受压滞回曲线采用本文提出的模型,受拉滞回曲线采用腾-邹模型。
In this paper, the uniaxial hysteretic constitutive model of stirrup-restrained concrete is deeply studied, and six kinds of typical models are calculated and analyzed by ABAQUS secondary development function. Through the comparison between the calculation results of each model and the test results and the comparison among the models, the accuracy and calculation efficiency of each model are studied from three aspects of compression skeleton curve, compression hysteresis curve and tension hysteresis curve. Based on the comparative analysis, a practical constitutive model of concrete with uniaxial hysteresis is established, which is in good agreement with the experiment and considering the complicated loading path. Mander model is adopted for the compression skeleton curve of this model, the model proposed in this paper is adopted for the compression hysteresis curve, and Teng-Zou model is used for the tension-hysteresis curve.