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

建立了大体积混凝土胶凝复合材料开裂/未开裂细观损伤及结构性能的多尺度模拟模型。该模型能够成功地模拟混凝土结构在其生命周期中反复承受千~百万次荷载的长期行为。提出了混凝土中钙、硼等离子的分解及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.