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Study of Failure Process in Concrete Samples by Using Numerical Simulation

ZHANG De-hai~1, XING Ji-bo~2, ZHU Fu-sheng~1, YANG Shun-cun~3(1. School of Resource & Civil Engineering, Northeastern University, Shenyang, 110004, China; 2. Department of Civil Engineering, Yantai University, Yantai 264005, China; 3. College of Civil Engineering, Hehai University, Nanjing 210098, China. Correspondent: ZHU Fusheng, E-mail: neuzfs @ etang.com)  
A numerical approach based on Beam-Particle Model (BPM~2) is developed to the simulation of fracture process of concrete samples under uniaxial compression. Three types of beam have been used in BPM~2 to form numerical model of concrete at mesoscal level, and the mechanical properties of every type of beam are randomly initialized according to Weibull distribution so as to reflect the initial heterogeneity of concrete samples at mesoscale level. The results of numerical simulation showed that the initiation and propagation of internal cracks at mesoscale level and their connection with each other in the concrete samples are just the cause of its macro-failure. It has been revealed via a comparison of numerical simulations that the failure modes of concrete samples vary with the initial heterogeneity of distribution of material properties. The fracture mechanism of concrete has been discussed on the basis of the numerical simulation.
【Fund】: 国家自然科学基金资助项目(10072053);; 东北大学优秀博士论文基金资助项目
【CateGory Index】: TU528
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