大型再生骨料混凝土单轴压缩性能的数值模拟

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI:10.1109/ICETCE.2011.5774688

Jing Li, Lin-fu Wang, Lin Jiang, Juan Li, Hu Liu

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引用次数: 1

摘要

基于混凝土细观力学，认为大再生骨料填充混凝土是由大再生骨料、自密实混凝土和界面过渡区(ITZ)组成的一种三相复合非均质材料。采用随机骨料模型来表示大再生骨料填充混凝土的微观结构。采用有限元法对单轴压缩过程进行了数值模拟，数值模拟结果与实验结果吻合较好。结果表明:试件的破坏主要发生在自密实混凝土与大再生骨料之间的ITZ区，废砖不适合生产高强度大再生骨料填充混凝土;

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Numerical simulation of uniaxial compression performance of big recycled aggregate-filled concrete

Based on mesomechanics of concrete, the big recycled aggregate-filled Concrete is regarded as a type of three-phase composite heterogenous material composed of big recycled aggregate, self-compacted concrete and interfacial transition zone(ITZ). Random aggregate model is employed to stand for microscopic structure of big recycled aggregate-filled concrete. Uniaxial compression process is simulated by using finite element method and uniaxial compression numerical simulation results are in good agreement with corresponding experimental results. The results show that the most of destruction of the specimens occurs in the ITZ between self-compacted concrete and big recycled aggregate, and discarded bricks are not suitable to produce big recycled aggregate-filled concrete with high-strength.

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2011 International Conference on Electric Technology and Civil Engineering (ICETCE)

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