计算力学学报2016，Vol.33Issue(3)：321-327,342,8.DOI:10.7511/jslx201603007
混凝土楔入劈拉和三点弯曲断裂过程的细观数值模拟
Mesoscale simulation on f racture process of wedge splitting and three-point bending of concrete
摘要
Abstract
Based on the discrete element method and Voronoi diagram technology ,in this paper ,the mesoscale Rigid Body Spring Model (RBSM ) for simulating the fracture process of concrete was used to conduct the numerical analysis of the fracture process of concrete wedge splitting specimens and three‐point bending notched concrete beams .The obtained results were then compared with available experimental results in terms of the process of crack propagation ,the failure patterns of specimens ,load‐CM OD behaviour and fracture energy .It is show n that the mesoscale RBSM can be accurately applied to simulate the fracture process of concrete wedge splitting specimens and three‐point bending notched concrete beams .The effects of different ratio of a/D and aggregate volume contents on the fracture process of concrete were also investigated and it is found that the fracture energy of specimens becomes higher with the increasing of the aggregate volume contents .关键词
细观刚体弹簧元/楔入劈拉/三点弯曲切口梁/断裂能/骨料体积含量Key words
Mesoscale Rigid Body Spring Model (RBSM )/wedge splitting/three-point bending notched beam/fracture energy/volume content of aggregate分类
建筑与水利引用本文复制引用
王思莹,王立成,王文斌..混凝土楔入劈拉和三点弯曲断裂过程的细观数值模拟[J].计算力学学报,2016,33(3):321-327,342,8.基金项目
国家重点基础研究发展计划（973计划）（2015CB057703）；国家自然科学基金（51378090）资助项目． （）
