含水率和应变率对砂岩单轴抗压强度的影响分析  

Influence Analysis of Moisture Content and Strain Rate on the Uniaxial Compressive Strength of Sandstone

作　　者：张军[1] 高富强[2] 杨小林 杨金金[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]洛阳理工学院土木工程学院,河南洛阳471023

出　　处：《洛阳理工学院学报（自然科学版）》2016年第1期13-16,共4页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：国家自然科学基金(51204096)

摘　　要：对砂岩在不同含水率和不同应变率的条件下进行单轴压缩试验,统计含水率和应变率耦合条件下的砂岩单轴抗压强度平均值,分析含水率和应变率对砂岩单轴抗压强度的影响规律。结果表明:应变率的增加对砂岩的含水弱化效应起到了减弱作用,含水率对砂岩的单轴抗压强度的弱化作用比应变率对砂岩的单轴抗压强度的强化作用更显著。Uniaxial compression tests of sandstone are carried out with different moisture contents and strain rates. The average value of uniaxial compressive strength of sandstone under the condition of coupling moisture content and strain rate is counted to analyze the affecting rules of moisture content and strain rate on uniaxial compressive strength of sandstone. Results show that the increase of strain rate has reduced the weakening effect of sandstone moisture content; the weakening effect of moisture content is more remarkable than the strengthening effect of strain rate on the uniaxial compressive strength of sandstone.

关 键 词：含水率 应变率 砂岩 单轴抗压强度 

分 类 号：TU452[建筑科学—岩土工程]