Multi-scale modeling of cementitious composites for performance assessment of reinforced concrete infrastructures subjected to coupled with high-cycle load and environmental impacts

建立了多尺度模拟模型，定量研究了大体积混凝土结构性能和开裂/未开裂水泥基复合材料的微观损伤。该模型能够较好地模拟混凝土结构在其生命周期内承受上千~百万次反复荷载的长期行为。此外，还提供了钙、硼等离子在混凝土中的分解和地下混凝土结构的再吸收模型。通过宏观和微观模型的耦合，本研究能够预测结构混凝土的长期力学和热力学性能及其对环境的影响。

The multi-scale simulation model to quantify the micro damage of cracked/uncracked cementitious composites as well as structural performance made by massive concrete was developed. The model is capable of successfully simulating a long-term behaviors of concrete structure subjected to repeated thousand～million cycles of loads in its life. Furthermore, ion resolution from concrete, such as calcium, boron etc. and re-absorption model for underground concrete structure was provided. With coupling the macro and micro models, this study enables to predict long-term mechanical and thermo-dynamic performances of structural concrete and its environmental impact.