In order to investigate the mechanical properties change and damage process of self-compacting concrete four-point bending test with different fly ash content,a discrete element model of high-volume fly ash self-compacting concrete was established in PFC2D to simulated the loading.Compared the results of simulation with experiment to analyzed the failure mode and contact force development.The research shows that discrete element method could simulate the four-point bending test of self-compacting concrete with high content of fly ash,and the results obtained by simulating are consisting with experiment.The failure crack of the simulated specimen is a vertical crack that develops upward from the bottom which is similar to those obtained in the laboratory.Compared with the disadvantages of experiment that can only be observed with the naked eye,discrete element method can clearly reflect the crack generation process and the changes of internal stress.
关键词
粉煤灰/自密实混凝土/四点弯曲/破坏形态/离散元
Key words
fly ash/self-compacting concrete/four-point bending/failure form/discrete element method
万方数据