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Mesoscopic Numerical Evolution Analysis of Concrete Damage Under Uniaxial Tension and Compression(PDF)


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Mesoscopic Numerical Evolution Analysis of Concrete Damage Under Uniaxial Tension and Compression
LIN Gao12 LI Jian-bo1 ZHAO Juan1 LIANG Zheng-zhao1
1. Earthquake Engineering Research Division, Dalian University of Technology, Dalian 116024, Liaoning, China; 2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
concrete random aggregate model damage and fracture mesoscopic numerical simulation uniaxial tension uniaxial compression
An advanced method was presented to generate aggregates with random shapes and various sizes according to the given aggregate gradation curve and aggregate area fraction, and the elastic damage constitutive relations of mesoscopic elements were established in the three-dimension stress field. Numerical simulation tests were carried out to study the damage evolution on meso-level and the influences of parameters on macro-level strength of concrete specimen, in which two different kinds of concrete strengths were compared. The numerical results verify this mesoscopic model, and show that the failure of concrete is mostly due to the accumulation of tensile damage on mesoscopic level.


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Last Update: 2007-03-20