论文部分内容阅读
实验结果表明,岩石的弹性波速度VP,VS1,VS2随压力的升高而上升,随温度的升高而下降;平均应变随循环数(时间)的变化类似于一条蠕变曲线。根据不同温区应变速率随时间的增长不同,将它分为3个蠕变阶段。随循环数的增加,温度不断上升,岩石标本的热损伤和疲劳损伤累积,使岩石标本内部的微观结构劣化,强度降低,最终促使标本宏观破坏。这对大型地下工程抗震、核仓库的设计是很有意义的。
The experimental results show that the elastic wave velocity VP, VS1 and VS2 of rock increase with the increase of pressure and decrease with the increase of temperature. The change of average strain with cycle (time) is similar to a creep curve. According to the different temperature zone strain rate with the growth of different time, it is divided into three creep stage. With the increase of the number of cycles, the temperature is rising, the thermal damage and fatigue damage of rock specimens accumulate, which deteriorates the microstructure and reduces the strength of the specimens. Finally, the specimens are destroyed macroscopically. This is a large underground earthquake-resistant, nuclear warehouse design is of great significance.