钢筋混凝土构件细观数值模拟分析

在混凝土材料的细观力学分析模型基础上，提出了一种钢筋混凝土构件非线性力学特性分析的细观数值方法。使用本文细观力学方法对轴压加载作用下某一钢筋混凝土柱的损伤破坏过程及宏观力学特性进行了数值模拟研究，并与试验结果和宏观力学模型方法分析结果进行了对比。研究表明：(1) 细观尺度上，采用细观力学模型获得的钢筋混凝土柱的破环模式及宏观力学性能均与试验结果吻合很好，验证了本文细观力学方法的有效性和准确性；(2) 相比于宏观尺度分析模型，细观力学模型考虑了混凝土的非均质特性，从而更真实地揭示了钢筋混凝土柱的破坏过程及破坏模式，且计算结果与试验结果对比也更为吻合。

Meso numerical simulation of reinforced concrete members

Based on meso mechanical analysis model of concrete material, a meso numerical approach is proposed to investigate the nonlinear mechanical properties of reinforced concrete members. The damage process and macro mechanical properties of a reinforced concrete column under axial compression are simulated by the proposed method in the paper. The meso-scale simulation results are compared with macro-scale mechanical analysis results and the experimental results. The study indicates that: (1) at meso-level, the failure modes and macro mechanical properties of the reinforced concrete column derived from meso element equivalent model agree well with the experimental results, which demonstrate the effectiveness and correctness of the proposed meso-mechanical approach; (2) Compared to macro-scale model, the meso mechanical model, which takes the heterogeneity of concrete, could reveal the damage process and failure mode of reinforced concrete column more realistic, and the numerical results are more consistent with the experimental results.