基于随机骨料模型的EPS混凝土粒子尺寸效应分析

doi:10.11896/j.issn.1005-023X.2018.18.009

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Abstract Micro-mechanics model of EPS concrete based on random distribution was built, compression and damage process of EPS concrete was simulated numerically to analyze the compression and damage process of EPS concrete. The results showed that the damage of EPS concrete had two failure forms include ductile failure and brittle failure. Ductile failure was related to area occupancy ratio and the fracture process zone length of EPS concrete. Meanwhile, brittle failure was related to area occupancy ratio, particle size and the spacing between particles of EPS concrete. The size-effect of EPS concrete had obvious effect on stress-strain of concrete when the area occupancy ratio of EPS concrete was low. However, the size-effect of EPS concrete had little effect on stress-strain of concrete when the area occupancy ratio of EPS concrete was high. The damage of EPS concrete turns from brittle failure to ductile failure along with the increase of the area occupancy ratio of EPS concrete. The mathematical model of particle size effect based on damage mechanics and fracture mechanics was built, and then validated by numerical simulation, which indicates that good agreement was obtained.

Key words： EPS concrete random aggregate particle size effect fracture process zone geometric feature length

Published: 18 October 2018

CLC number:

TU528.0

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	Articles by authors
	HU Jun
	WANG Jie
	LI Zhaorui
	WU Deyi

Cite this article:

HU Jun,WANG Jie,LI Zhaorui, et al. Analysis of the Particle Size Effect of EPS Concrete Based on Random Aggregate Model[J]. Materials Reports, 2018, 32(18): 3146-3153.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.18.009 OR http://www.mater-rep.com/EN/Y2018/V32/I18/3146

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