江苏大学学报（自然科学版）2012，Vol.33Issue(3)：350-353,4.DOI:10.3969/j.issn.1671-7775.2012.03.021
钢纤维高强混凝土抗冲击性能的数值仿真
Numerical simulation on impact resistance of steel fiber reinforced high strength concrete
摘要
Abstract
By explicit dynamic finite element software of LS -DYNA, the split hopkinson pressure bar (SHPB) impact experiment of steel fiber reinforced high strength concrete (SFRHSC) were numerically simulated. Elastic-plastic hydrodynamic model and Hooke's law were adopted to describe the constitutive relations of concrete and SHPB, respectively. The reinforcing and toughening effects of steel fiber on concrete were characterized by strength and failure strain of SFRHSC, respectively. The results show that internal stress of specimens oscillate initially before reaching stress equilibrium. Failure process of specimens are slightly delayed to their peak stress. The fracture of specimens matrix are more severe than that of SFRHSC specimens at any time. At the same impacting velocity, the cracks propagate in SFRHSC specimen with overall unchanged shape, while the specimens matrix are broken into many pieces. The numerical simulation results exhibite good consistency with those of experiment, and can basically reflect the characteristic of dynamic load and specimens failure during SHPB impact experiment.关键词
钢纤维/高强混凝土/霍普金森压杆/冲击/数值仿真Key words
steel fiber/ high strength concrete/ split Hopkinson pressure bar/ impact/ numerical simulation分类
建筑与水利引用本文复制引用
焦楚杰,蒋国平,高乐..钢纤维高强混凝土抗冲击性能的数值仿真[J].江苏大学学报（自然科学版）,2012,33(3):350-353,4.基金项目
国家自然科学基金资助项目(50708022) （50708022）
广东省自然科学基金资助项目(06301038) （06301038）
建设部科研开发项目(06-K1-37,2010-K3-27,2010-K4-18) （06-K1-37,2010-K3-27,2010-K4-18）
广州市属高校羊城学者科研项目(10A043G) （10A043G）
广州大学科研创新团队项目(2008-1016) （2008-1016）
