预应力锚索的非局部摩擦分析  

Nonlocal friction analysis of prestressed cables

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,江西南昌330031 [2]江西科技师范学院,江西南昌330013

出　　处：《煤田地质与勘探》2009年第3期41-44,共4页Coal Geology & Exploration

基　　金：教育部博士点基金项目(20050403002);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：采用Oden等提出的非局部摩擦模型对预应力锚索锚固段进行受力分析。根据Kelvin问题的位移解导出预应力锚索锚固段的剪应力,得到了在非局部摩擦模型下的预应力锚索锚固段的剪应力积分解,再用Maple程序求解。通过对非局部摩擦模型和局部摩擦模型(库仑模型)下的剪应力结果进行比较,并分析了影响剪应力的非局部效应的相关因素,验证了其有效性和合理性。结果表明,非局部效应随岩体的坚硬程度和非局部效应尺寸的变化而变化。In this paper, based on Kelvin＇s solution of displacement, a solution of shear stress in the anchorage is derived. The nonlacol friction law proposed by Oden et al is used to analyze the prestressed cables. The integral form of shear stress is obtained and solved by programming Maple language. The nonlocal effect on the contact surface stress distribution is shown here and the solution of shear stress is given. The results are compared with those obtained by the nonlocal frication model and local frication model. The factors which affect the nonlocal friction effect are discussed. The results also show that nonlocal effect changes with rock hardness and nonloeal effect size.

关 键 词：预应力锚索 非局部摩擦 非局部影响系数 力学分析 

分 类 号：TU45[建筑科学—岩土工程]