›› 2009, Vol. 30 ›› Issue (S2): 518-523.

• Numerical Analysis • Previous Articles     Next Articles

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

DANG Fa-ning1, LIANG Xin-yu1, TIAN Wei1, CHEN Hou-qun1.2   

  1. 1.Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, China; 2.China Institute of Water Resources and Hydropower Research, Beijing 100044, China
  • Received:2009-08-10 Online:2009-08-10 Published:2011-06-21

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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.

Key words: size effect, random aggregate model, compressive strength, error of strain

CLC Number: 

  • TU 443
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