东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2004, Vol. 25 ›› Issue (2): 175-178.DOI: -

• 论著 • 上一篇    下一篇

混凝土破坏过程的数值模拟

张德海;邢纪波;朱浮声;杨顺存   

  1. 东北大学资源与土木工程学院;烟台大学土木系;东北大学资源与土木工程学院;河海大学土木工程学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2004-02-15 发布日期:2013-06-24
  • 通讯作者: Zhu, F.-S.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(10072053);;

Study of failure process in concrete samples by using numerical simulation

Zhang, De-Hai (1); Xing, Ji-Bo (2); Zhu, Fu-Sheng (1); Yang, Shun-Cun (3)   

  1. (1) Sch. of Resource and Civil Eng., Northeastern Univ., Shenyang 110004, China; (2) Dept. of Civil Eng., Yantai Univ., Yantai 264005, China; (3) Coll. of Civil Eng., Hehai Univ., Nanjing 210098, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-02-15 Published:2013-06-24
  • Contact: Zhu, F.-S.
  • About author:-
  • Supported by:
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摘要： 采用梁 颗粒模型BPM2(beam particlemodel)模拟了混凝土在单轴受压状态下的破坏过程·在模型中用3种类型梁单元形成混凝土细观数值模型,每种梁单元的力学性质均按Weibull分布随机赋值,以便模拟混凝土细观结构的非均匀性·数值模拟结果显示,混凝土宏观破坏是由于其内部细观裂纹产生、扩展、连接的结果,揭示出混凝土破坏形态随材料性质分布的非均匀性变化而不同·

关键词: 细观计算力学, 数值模拟, 非均质脆性材料, 混凝土破裂和传播, 梁-颗粒模型, Weibull分布

Abstract: A numerical approach based on Beam-Particle Model (BPM2) is developed to the simulation of fracture process of concrete samples under uniaxial compression. Three types of beam have been used in BPM2 to form numerical model of concrete at mesoscale level, and the mechanical properties of every type of beam are randomly initialized according to Weibull distribution so as to reflect the initial heterogeneity of concrete samples at mesoscale level. The results of numerical simulation showed that the initiation and propagation of internal cracks at mesoscale level and their connection with each other in the concrete samples are just the cause of its macro-failure. It has been revealed via a comparison of numerical simulations that the failure modes of concrete samples vary with the initial heterogeneity of distribution of material properties. The fracture mechanism of concrete has been discussed on the basis of the numerical simulation.

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