Xiao J.,Tongji University |
Li H.,Tongji University |
Li H.,Institute of Architectural Design and Research of Zhejiang Province |
Li L.,Tongji University
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | Year: 2012
The fatigue behaviors of recycled aggregate concrete (RAC) with 100% recycled coarse aggregate (RCA) replacement percentage under flexure loading are tested. The fatigue failure pattern and fatigue strength are analyzed. Based on the analysis of fatigue strain variation in different heights of prism as well as the neutral axis depth, the fatigue damage evolution of RAC is investigated. On the basis of the experimental results and continuum damage mechanics, a flexural fatigue damage model is proposed. The results show that the failure pattern under fatigue flexure loading is basically the same as that under static loading, and a linear relationship exists between the logarithm of fatigue life N of RAC and the stress level S under flexure loading. The flexural fatigue damage model is good enough to verify the fatigue test results. It can be applied to the theoretical and numerical analyses of the RAC fatigue behavior under flexure loading.