花岗岩样品高温后损伤的试验研究  

Testing study on damage of granite samples after high temperature

作　　者：邱一平[1] 林卓英[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《岩土力学》2006年第6期1005-1010,共6页Rock and Soil Mechanics

摘　　要：对河南省某地产25块花岗岩样品进行高温预热处理,测量了加温前后弹性纵波波速,并对样品进行单轴压缩应力-应变全过程试验。通过以上试验,给出如下结果:温度对岩石损伤变化的作用;温度对岩石裂隙密度和损伤应变能释放率的影响。实验结果验证了花岗岩的塑性应变主要与偏斜应力产生的形状改变比能有关,而与体积改变比能的关系不大。The compressional elastic wave velocities are measured for 25 granite samples in Henan Province before and after high temperature; and the complete stress and strain experiment of uniaxial compression is carried out. Through the experiment, the rock damage change due to temperature, temperature affects on rock porosity density and damage strain energy release rate, were observed The experimental data show that the plastic strain of granite mainly depends on the strain energy of distortion due to deviatoric stress, but not on the strain energy of volume change.

关 键 词：温度 损伤 裂隙密度 应变能释放率 

分 类 号：TU458[建筑科学—岩土工程]