【作者】 王开林； 杨圣奇； 苏承东；

【Author】 Wang Kailin,Yang Shengqi,Su Chengdong (School of Civil Engineering, Henan Polytechic University, Jiaozuo, Henan 454000; Institute of Geotechnical Engineering, He Hai University, Nanjing,Jiangsu 210098; School of Energy Science and Engineering, Henan Polytechic University, Jiaozuo,Henan 454000

【机构】 河南理工大学土木工程学院； 河海大学岩土工程研究所； 河南理工大学能源科学与工程学院；

【摘要】 本研究采用北海道登别凝灰岩为研究对象,利用MTS312．21型电液伺服试验机在五级不同的应变速率下,对冻结状态下自然干燥岩样和水饱和岩样进行了单轴压缩试验,研究了应变速率对冻结状态下的岩样强度、变形等力学参数的影响规律,建立了冻结状态下反映应变速率的水饱和岩样单轴抗压强度的经验公式。结果表明,冻结状态下应变速率的变化对自然干燥岩样的单轴抗压强度没有太大的影响; 而水饱和岩样的峰值强度随应变速率的增大有明显增大的趋势。更多还原

【Abstract】 In the study field , the influence of different strain rates on the mechanical properties of welded tuff in freezing condition was reported. Specimens of welded tuff were manufactured from rock in Noboribetsu, Hokkaido, Japan, which were chosen for these tests. Here, specimens are separated into tow kinds, one is air-dried specimen, aother is water-saturated specimen. Many specimens of standard size are observed at five strain rates with uniaxial compression test. Based on the complete stress-strain curves, the effects of strain rates on rock strength, Elastic Modulus and so on are discussed in detail. The empirical equations to evaluate the strain rate dependent on rock mechanical properties are presented as well, which will provide some reference for the choice of rock mechanical parameters in field rock engineering design.更多还原