冻结黏土单轴与主动围压状态SHPB试验对比分析
发布时间：2018-11-02 08:35
【摘要】：利用分离式Hopkinson压杆试验装置,进行了冻结黏土在单轴与主动围压两种状态下的动态冲击压缩试验,对比分析了单轴与主动围压状态下冻结黏土的动态应力-应变曲线、动态抗压强度和破坏模式。研究结果表明:单轴状态下,温度为-15℃时,动态应力-应变曲线可分为弹性阶段、塑性阶段和破坏阶段;主动围压状态下,-5℃和-15℃的动态应力-应变曲线可分为弹性阶段、塑性阶段和破坏阶段。在相同应变率和冻结温度的条件下,主动围压状态下冻结黏土的动态抗压强度均高于无围压状态,动态抗压强度随着主动围压的增加而增大;当冻结温度和围压相同的条件下,动态抗压强度随应变率的提高而增大;单轴状态下,温度为-5℃时,冻结黏土呈塑性破坏,温度为-15℃时,冻结黏土呈脆性破坏。
[Abstract]:The dynamic shock compression tests of frozen clay under uniaxial and active confining pressures were carried out by using a separate Hopkinson compression bar test device. The dynamic stress-strain curves of frozen clay under uniaxial and active confining pressures were compared and analyzed. Dynamic compressive strength and failure mode. The results show that the dynamic stress-strain curve can be divided into elastic stage, plastic stage and failure stage under uniaxial state and temperature of -15 鈩，
本文编号：2305502
[Abstract]:The dynamic shock compression tests of frozen clay under uniaxial and active confining pressures were carried out by using a separate Hopkinson compression bar test device. The dynamic stress-strain curves of frozen clay under uniaxial and active confining pressures were compared and analyzed. Dynamic compressive strength and failure mode. The results show that the dynamic stress-strain curve can be divided into elastic stage, plastic stage and failure stage under uniaxial state and temperature of -15 鈩，
本文编号：2305502
本文链接：https://www.wllwen.com/jianzhugongchenglunwen/2305502.html
