Application of Base Force Element Method to Mesomechanics Analysis for Recycled Aggregate Concrete
Application of Base Force Element Method to Mesomechanics Analysis for Recycled Aggregate Concrete
复制标题
基础力元法在再生骨料混凝土细观力学分析中的应用
DOI：
10.1155/2013/292801
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发表时间：
2013-01-01
影响因子：
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通讯作者：
Zhang, Lijuan
中科院分区：
文献类型：
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作者：
Peng, Yijiang;Liu, Yinghua;Zhang, Lijuan
采用基于势能原理的基础力单元法（BFEM）对再生骨料混凝土进行了中观分析。推导了具有三角形单元的BFEM模型。再生骨料混凝土是由天然粗骨料、新砂浆、新界面过渡区（ITZ）、旧砂浆、中观旧ITZ组成的五相复合材料。采用随机骨料模型模拟再生骨料混凝土的细观结构。采用BFEM分别模拟了RAC单轴压缩和拉伸试验的力学性能。仿真结果与试验结果吻合较好。该研究方法是研究再生骨料混凝土断裂机理和力学性能数值模拟的新途径。
The base force element method (BFEM) on potential energy principle is used to analyze recycled aggregate concrete (RAC) on mesolevel. The model of BFEM with triangular element is derived. The recycled aggregate concrete is taken as five-phase composites consisting of natural coarse aggregate, new mortar, new interfacial transition zone (ITZ), old mortar, and old ITZ on meso-level. The random aggregate model is used to simulate the mesostructure of recycled aggregate concrete. The mechanics properties of uniaxial compression and tension tests for RAC are simulated using the BFEM, respectively. The simulation results agree with the test results. This research method is a new way for investigating fracture mechanism and numerical simulation of mechanics properties for recycled aggregate concrete.