论文部分内容阅读
在实际工程中,岩石大多是含初始损伤的,分析含初始损伤岩石的力学性能有重要的工程意义。预先统计岩石试块的初始抗压强度,然后根据其抗压强度给岩石试块施加压力。分别施加了极限抗压强度的10%、30%、50%、70%、80%、90%,以形成不同的初始损伤。然后通过低温冻融实验和单轴压缩实验,将岩石在传统循环荷载作用后的损伤与低温冻融损伤进行比较,得出这两种损伤的异同点,建立了岩石材料在不同环境条件下的损伤表达式,研究了初始损伤对岩石冻融的影响,对今后估测含初始损伤岩石的冻融寿命有一定参考价值。
In practical engineering, most of the rocks contain initial damage. It is of important engineering significance to analyze the mechanical properties of the rock with initial damage. The initial compressive strength of the rock test block is forecasted, and then the rock test block is pressurized according to its compressive strength. The initial compressive strength of 10%, 30%, 50%, 70%, 80%, 90%, respectively, to form a different initial damage. Then the freezing and thawing experiments and the uniaxial compression experiments were carried out to compare the damage of the rock after the traditional cyclic loading with the freezing and thawing damage at low temperature. The similarities and differences between the two kinds of damage were obtained. The rock materials under different environmental conditions Damage expression of the initial damage on the rock freeze-thaw impact on future estimates of initial damage of rock with a certain reference value of the freezing and thawing life.