摘要
岩石材料的动态拉伸力学特性是评价爆炸以及地震等动荷载作用下岩体工程响应以及安全的基本参数。介绍了一种有侧向压力的岩石动态直接拉伸试验研究装置,同时采用石膏和花岗岩材料对试验装置进行了尝试性试验。研究结果表明,岩石类脆性材料的抗拉强度随应变速率以及侧向压力的变化规律,与前人进行的岩石间接动态拉伸试验和及岩石类脆性材料(混凝土)双轴试验的变化规律具有一定相似性,因此所介绍的试验装置可以应用于岩石类脆性材料动态直接拉伸试验研究。
The dynamic tensile properties of rock material are the basic information to assess the safety of rock structure under dynamic loads such as explosion and earthquake. An apparatus to conduct direct dynamic tension tests with confining pressures for rock is introduced. In addition, a series of trial experiments are conducted by gypsum and granite samples. It is reported the change of strength for the gypsum and granite samples with strain rate and confining pressure are similar with that rock material under indirect dynamic tension tests, as well as the rock like material （concrete） under biaxial tension-compression tests. For this case, the apparatus is available to perform the dynamic direct tension test with confining pressure for rock material.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第11期2365-2368,2374,共5页
Rock and Soil Mechanics
基金
国家自然科学基金重点项目(No.50439030)
国家重点基础发展规划项目(No.2002CB412705)资助课题
关键词
岩石
动态拉伸
侧向压力
设备
rock
dynamic tension
confining pressure
apparatus
