Numerical Simulation of Different-Shaped Random Aggregates’ Influence on Concrete’s Compression Strength

Hong Chang Qu; Guo Rong Chen

doi:10.4028/www.scientific.net/AMR.33-37.623

Paper Titles

Experimental and Numerical Simulation of the Mechanical Behavior of Stratospheric Balloons Materials
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Jet Projectiles Penetration into Multilayer Metal Targets with Large Interval
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Modeling of Stress-Induced Permeability Evolution and Damage of Rock
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Model Testing and Analysis Study on Shear Strength of Rock Mass Containing Multiple Cracks under Compression-Shearing Loading
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Numerical Simulation of Different-Shaped Random Aggregates’ Influence on Concrete’s Compression Strength
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Effect of Non-Homogeneity on Limit Bearing Capacity of Rock Block
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Coupled THM Model and Simulation of the Yucca Mountain and FEBEX Case Study within DECOVALEX-THMC Framework
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The Thermo-Hydro Coupled Model of Low-Temperature Rock In Consideration of Phase Change
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Concrete Durability Test Due to Environmental Degradation Using Environment Simulation Technology
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Numerical Simulation of Different-Shaped Random Aggregates’ Influence on Concrete’s Compression Strength

Abstract:

A three-phase composite material specimen consisting of aggregates, mortar matrix and their bonding material is created through the Monte-Carlo method. The Mazars isotropic damage evolution model is used to describe the meso-mechanics damage deterioration of concrete. And the finite element method is adopted to simulate respectively the uniaxial compression numerical models of two, three and full graded specimens with sphere and polyhedron aggregates. Following are the conclusions from the test results: the ultimate load capacity of arbitrary polyhedron aggregate specimen is greater than that of the sphere one of the same grade; the size effect law exists in these numerical models of concrete specimens; the stiffness of the polyhedron aggregates’ specimen of the same grade is greater than that of the sphere ones’, and the softening curves of the sphere aggregate model are easier than those of the polyhedron by comparison in the softening phase of stress-strain curves.