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《Acta Materiae Compositae Sinica》 2018-06
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Microscopic numerical simulation of the uniaxial compression of steel fiber reinforced ultra-high performance concrete

ZHAO Qiushan;XU Shenchun;LIU Zhongxian;Tianjin Key Laboratory of Civil Structure Protection and Reinforcement,Tianjin Chengjian University;School of Civil Engineering,Tianjin University;  
The finite-element model of three-dimensional steel fiber reinforced ultra-high performance concrete(SF/UHPC)cylindrical specimen was developed on the mesoscopic level by utilizing LS-DYNA,and the mechanical properties and crack development of which under axial compression were numerically simulated.Based on the verification of the validity and rationality of above-mentioned mesoscopic numerical model,the effects of steel fiber volume fraction,aspect ratio,shape and size on compressive strength,toughness and failure mode of SF/UHPC were studied emphatically.Finally,the formula for predicting the compressive strength of SF/UHPC was fitted according to the simulation results.The results indicate that the developed mesoscopic model in this paper for simulating SF/UHPC can well characterize the static performance and damage mechanism of concrete under uniaxial compression stress,and the fitting formula can also predict the compressive strength of SF/UHPC.
【Fund】: 国家重点基础研究发展计划(2015CB058002);; 天津市科技支撑计划项目(14ZCZDSF00016)
【CateGory Index】: TU528.572
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