【作者】 孟陆波； 李天斌； 周君波； 朱明磊；

【Author】 Meng Lubo;Li Tianbin;Zhou Junbo;Zhu Minglei;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology;

【机构】 成都理工大学地质灾害防治与地质环境保护国家重点实验室；

【摘要】 利用MTS815岩石力学试验系统,对绿泥石英片岩进行阻尼参数及动弹性参数的动三轴测试研究。波形为正弦波,频率1 Hz,振动循环30次。试验结果表明,绿泥石英片岩动弹性模量随着循环周次的增加而整体呈减小趋势;单轴试验条件下动泊松比、阻尼系数和阻尼比随着循环周次的增加呈减小趋势;三轴试验条件下泊松比、阻尼系数和阻尼比随着循环周次的增加呈增大趋势。相同循环周次下绿泥石英片岩的动弹性模量、动泊松比随着围压的增大而增大;阻尼系数随围压增大而增大,阻尼比随着围压增大而减小。随着围压增大,试件破坏面由张拉破坏过渡到张剪复合破坏。更多还原

【Abstract】 The dynamic tests for chlorite quartz schist under different confining pressure are conducted on MTS815 rock mechanics test system. Damping parameters and dynamic elastic parameters of chlorite quartz schist are tested. The sine wave is adopted in cyclic loading tests at the frequency of 1 Hz,and the cyclic number is 30. The results indicate that: with increasing cyclic number, dynamic elastic modulus, dynamic Poisson’s ratio, damping coefficient and damping ratio decreases while uniaxial test conditions, however, dynamic elastic modulus decreases, dynamic Poisson’s ratio, damping coefficient and damping ratio increases while triaxial test conditions. Under the same cyclic number, dynamic elastic modulus, dynamic Poisson’s ratio and damping coefficient increases with increasing confine pressure, damping ratio decreases with increasing confine pressure. Increases as the confining pressure, the rock fracture surface by tension damage transition to tensile shear damage.更多还原