基于损伤理论的预应力锚索荷载-变形特性分析  

ANALYSIS ON LOADING-DEFORMATION OF PRESTRESSED CABLE BASED ON DAMAGE THEORY

作　　者：何思明[1] 王成华[1] 吴文华 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]中国第十九冶金建设公司建筑设计研究院,攀枝花617023

出　　处：《岩石力学与工程学报》2004年第5期786-792,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：中国科学院重要方向创新项目(KJCX-SW-L1-6)资助课题。

摘　　要：根据损伤理论的基本原理,分别定义了岩体剪切损伤变量和受拉浆体材料的损伤变量,确定了各自相应的损伤演化方程;推导了基于浆体材料损伤的锚索锚固段荷载传递控制微分方程;并将岩体剪切损伤理论与常规剪切位移法相结合,研究了拉力型预应力锚索锚固段的荷载-位移特性、侧阻力分布特性以及轴力分布特性等。将一工程实例的计算结果与实测结果进行了比较,结果表明,该方法是可行的,特别适合描述预应力锚索处于较高应力水平时的工作特性。According to basic damage principle,the shear damage variable of rock and the pull damage variable of grout body are defined,and the damage evolution equation is suggested. The loading transfer differential equation of anchoring section is obtained based on grout body damage. The load-deflection characteristics of anchoring section of prestressed cable,lateral resistance distribution as well as axial load distribution of anchoring section are studied. A case comparison calculation with testing has indicated that the presented theory is feasible.

关 键 词：岩石力学 锚索 损伤理论 剪切位移法 荷载-变位 

分 类 号：TU452[建筑科学—岩土工程]