全长粘结式锚杆的非局部摩擦分析  

Nonlocal Friction Analysis of Wholly Grouted Anchor

作　　者：刘伟平[1] 扶名福[1] 罗小艳[2] 

机构地区：[1]南昌大学建筑工程学院,南昌330029 [2]江西科技师范学院,南昌330013

出　　处：《力学季刊》2008年第3期442-447,共6页Chinese Quarterly of Mechanics

基　　金：教育部高等学校骨干教师资助计划项目(z1970);江西省教育厅科技计划项目(s00164);南昌大学校基金项目(z03309)

摘　　要：本文对Oden等提出的非局部摩擦模型进行了修正,得到了修正后的非局部摩擦模型,并应用于全长粘结式锚杆问题。文中利用Mindlin问题的位移解导出的全长粘结式锚杆沿杆体表面所受的剪应力的弹性解,对全长粘结式锚杆进行非局部摩擦分析,得到了在修正后的非局部摩擦模型下的全长粘结式锚杆的侧剪应力。文中修正的非局部摩擦模型下的全长粘结式锚杆的剪应力分布规律与试验得到的结果以及局部摩擦模型(库仑模型)下的计算结果进行了对比,结果表明修正的非局部摩擦模型下的计算结果与实验更符合。因此在描述此锚杆剪应力时,非局部摩擦模型比局部摩擦模型(库仑模型)更接近的实际。The nonlocal friction law proposed by Oden et al was modified and the modified nonlocal frication model to analyze the wholly grouted anchor was used. Based on Mindlin＇s solution of displacement, an elastic solution of shear stress on bolt surface for wholly grouted anchor was derived. Wholly grouted an- chor was analyzed by using the modified nonlocal frication model, the nonlocal effect on the contact surface stress distribution was shown here and the solution of shear stress on bolt surface was given. The results were compared with those obtained by the modified nonlocal frication model and local frication model and the experimental results in references. It is found that the result obtained by modified nonlocal frication model coincides reasonably well with experimental results, and coincides better than the local frication model. The result shows that the nonlocal friction law is more practicable.

关 键 词：全长粘结式锚杆 非局部摩擦 MINDLIN位移解 

分 类 号：TD353[矿业工程—矿井建设]