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
-
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型状态方程中的各项系数.Abstract: 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.
-
-
计量
- 文章访问数: 412
- HTML全文浏览数: 37
- PDF下载数: 0
- 施引文献: 0