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Based on the proposed material model, through the finite element method, the influences of the strain rate and the recycled coarse aggregate (RCA) replacement ratio on the structural behaviors and the damage evolution of the recycled aggregate concrete (RAC) structure are thoroughly investigated. The corresponding empirical formulas of the influence factors are proposed. It is revealed that the suffered damage in the structure increases with the increasing RCA replacement ratio. Based on the experimental results and the numerical simulation, the rate-dependent damage model of the RAC structure is proposed. The effects of the replacement ratio and the strain rate are taken into account in the suggested structural damage model. The damage evolution based on the proposed damage function model in this study is significantly important to improve the seismic performance and guide the seismic design of recycled aggregate concrete structures in the popularization and application of RAC.

Dynamic Damage Analysis of Recycled Aggregate Concrete Structures