锚杆拉剪大变形应变分析

ANALYSIS ON BOLT STRAIN WITH LARGE DEFORMATION UNDER SHEARING TENSILE LOAD

采用基于 S- R定理的大变形理论 ,运用拖带坐标描述法 ,研究了锚杆在节理岩石中的拉剪局部大变形行为 ;推求了锚杆大变形应变的计算公式 ,得出了锚杆拉剪应变分量的理论规律 ;指出可以通过位移量测确定锚杆变形与内力 。

In order to study large shearing tensile deformation behavior of bolt in discontiuous rock, the finite deformation theory is adopted based on S R decomposition theorem. By using co moving coordinate description, the formula of strain tensor of large deformation of bolt is derived. The theoretical law of bolt strain under shearing tensile loads is obtained. A theoretical method is put forward to determine bolt deformation based on displacement measurement. The validity of proposed theory is confirmed by experiment results of direct shearing on different bolted rock.