高强混凝土气体炮试验与高压状态方程研究  

High-pressure state equation of high strength concrete investigated with the gas gun experiment

作　　者：蒋国平[1] 焦楚杰[1] 肖波齐[2] 

机构地区：[1]广州大学工程抗震中心,广州510405 [2]三明学院物理与机电工程系,三明365004

出　　处：《物理学报》2012年第2期354-358,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:51078094;50708022)资助的课题~~

摘　　要：采用一级气炮加载技术和锰铜压力计测试技术,对C100混凝土在一维应变条件下的冲击特性进行了实验测量和分析.基于锰铜压力计测量的压力波形,通过拉格朗日分析得到了各拉氏位置的相关物理量,实测压力波形显示:不同位置处的压力波形在迅速上升至峰值后均随时间逐渐衰减,而冲击波峰值又随传播距离而衰减,于是将损伤引入状态方程,再从这些物理量出发,得到了多项式形式Gr(u|¨)neisen型状态方程巾的各项系数.The shock properties of C100 concrete are investigated by the gas gun planar impact technique.The manganin pressure gauge is used to measure the pressure-time curves of the samples.The physical quantities are all obtained by the Lagrange method.Moreover, it is observed from the measured pressure-time curves that the rate-sensitivity of dynamic response for C30 concrete is not negligible, showing marked stress relaxation and dissipation.The damage factor is introduced into the state equation.The material parameters in the Griineisen-type equation of state are determined.

关 键 词：状态方程 冲击 高强混凝土 

分 类 号：TU528[建筑科学—建筑技术科学]