混凝土的冲击特性描述  

Description of Properties of Concrete under Impact

作　　者：陈大年[1] S.T.S.Al-Hassani 尹志华[1] 俞宇颖[1] 沈雄伟[1] 

机构地区：[1]宁波大学力学与材料科学研究中心,浙江宁波315211 [2]Department of Mechanical Engineering UMIST

出　　处：《爆炸与冲击》2001年第2期89-97,共9页Explosion and Shock Waves

基　　金：国家自然科学基金项目! (19972 0 2 1);冲击波物理与爆轰物理国防科技重点实验室基金项目! (97JS75 . 2 .2 .QT190 1)

摘　　要：从连续损伤理论出发 ,讨论了盖帽模型。基于大量的混凝土实验结果 ,引出了一种经验性的率相关盖帽模型 ,可以用于描述较低速的混凝土平板撞击试验。为获得水泥砂浆石和卵石在冲击及冲击后的各自行为 ,提出了一种关于混凝土的二组分模型 ,并耦合于平板高速冲击实验的数值模拟 ;讨论了此二组分模型对于均匀冲击加载的非局部化响应问题。Cap models are discussed from the point of view of continuum damage theories. Basing on past investigations into experiments for concrete, an empirical rate-dependent cap model is proposed and adopted to simulate the behavior of concrete response to planar impact at lower velocities. In order to take behavior of individual components in concrete cells under shock loading, a multi-part model for concrete is presented and implemented in numerical simulations of plate shock experiments. Nonlocal response of the multi-part model for concrete to uniform shock loading is also presented.

关 键 词：混凝土 碰撞 冲击波 盖幅模型 多组分模型 冲击特性 

分 类 号：TU528.01[建筑科学—建筑技术科学] O347.3[理学—固体力学]