摘要
混凝土结构在爆炸与冲击载荷下的安全分析通常是结构的应力波效应和材料的应变率效应。而混凝土结构中的应力波传播特性实际上又依赖于混凝土在高应变率下率型本构关系。本文利用改装的杆径为74mm的直锥变截面式大尺寸Hopkinson压杆对混凝土材料进行冲击压缩实验,得到应变率约100s-1下的应力-应变全曲线及方程,得出混凝土具有敏感的应变率效应。
For the safety analysis of concrete structures under impulsive loading is i. e. stress wave effects and strain-rate effects. Moreover, the characteristics of stress waves propagating in concrete structures are essentially dependet on the rate-dependent constitutive relation of concrete materials under high stratin rates. In the paper, impact compression test on concrete is performed with a modified right cone vareable cross-section SHPB,and come to the stress-strain rate in 100/S strain rate. The experiment results show that the concrete manifests itself in two aspects.
出处
《低温建筑技术》
2004年第3期12-13,共2页
Low Temperature Architecture Technology
