The Damage Cumulative and Residual Life Prediction of RPC under Multi-stage Fatigue Load

In order to analyze the fatigue life of reactive powder concrete(RPC) structure,the axial compression fatigue tests of RPC specimens are carried ou,and behaviors of damage accumulation of RPC are studied.The damage variable is defined through describing evolution of residual strain and the damage evolution equation is obtained.Based on equivalent damage criteria,a nonlinear cumulative damage model was established.Finally,the residual fatigue lives of RPC specimens are predicted by using the damage model.The comparison of test residual fatigue life and predictive residual life indicate that the nonlinear cumulative damage model is reliable.