Numerical analysis of size effect on meso-concrete random aggregate model

DANG Fa-ning; LIANG Xin-yu; TIAN Wei; CHEN Hou-qun

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Numerical analysis of size effect on meso-concrete random aggregate model

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- Numerical analysis of size effect on meso-concrete random aggregate model
- Vol. 30, Issue S2, (2009)
- 作者机构：
  
  1. 西安理工大学岩土工程研究所,西安,710048
  2. 中国水利水电科学研究院工程抗震中心,北京,100044
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：21 June 2011，
  
  Published：2009
- 稿件说明：
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DANG Fa-ning, LIANG Xin-yu, TIAN Wei, et al. Numerical analysis of size effect on meso-concrete random aggregate model[J]. 2009, 30(S2).
DOI：

DANG Fa-ning, LIANG Xin-yu, TIAN Wei, et al. Numerical analysis of size effect on meso-concrete random aggregate model[J]. 2009, 30(S2). DOI：

摘要

为研究混凝土材料细观不均匀性对试件的静力学性能的影响，采用不同的随机数组，通过固定骨料尺寸，改变试件尺寸的方法，建立了不同的混凝土三维数值模型，都分6步施加相同的均布载荷，来模拟骨料和混凝土试件尺寸比例变化对试件力学性能的影响，研究了骨料随机位置对混凝土试件的应变影响。计算表明，当骨料半径和试件半径的比例系数逐渐增大时，应变误差平方和减小；骨料随机位置对混凝土试件的应变影响逐渐减小，试件的脆性越明显

Abstract

In order to research that the effect of meso-concrete material heterogeneity on the static properties of concrete cylinder sample

different random numbers are employed; aggregate size is fixed and size of the concrete samples is changed; different three-dimensional numerical models of concrete are established; the same uniform load is divided into six steps to impose on the models; the effect of various ratios between aggregate and sample radii on mechanical properties of concrete is simulated. The results show that: with the ratio increasing

the error square sum of strain is reduced. The effect of aggregate random location on the concrete samples is decreased; and the brittleness of the samples becomes obvious.

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