【摘要】 本文探讨了红砂岩在多轴压缩下的强度、变形和破坏特性;分析了岩石强度极限面的特征;确定了中间主应力σ₂对红砂岩抗压强度的影响系数α;讨论了三个主应力方向上的应力-应变曲线与侧压力的关系.在试验中采用了刚性接触和柔性接触的试验方式,并且把这两种试验结果作了对比。更多还原

【Abstract】 In this paper the characteristics of strength deformation and rupture of red sandstone under polyaxial compression were studied and the feature of the theoretical surface of strength of rock analysed. The coefficient a which represents the effect of intermediate principal stress σ₂ on the ultimate compressive strength of the rock was determined. The relation between the stress-strain curves along the directions of three principal stresses and the lateral pressure was discussed. The rigid and flexible contact modes were adopted during the experiments, and comparisions made between the test results for the two kinds of tests.更多还原