预应力锚索内锚固段剪应力分布规律研究  

Shearing stress distribution along anchoring section of pre-stressed anchor cable

作　　者：李金华[1] 朱海西 宋涛[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《西安科技大学学报》2016年第3期375-379,共5页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金(51508462);陕西省教育厅基金(2013JK0961)

摘　　要：为研究预应力锚索内锚固段剪应力分布规律,基于B Benmokrane三阶段线性函数建立锚固体与孔壁界面的剪切滑移本构模型,采用荷载传递函数法,对预应力锚索内锚固段剪应力沿轴向的分布规律进行理论研究,得到了不同状态下剪应力沿锚固段轴向的分布特征方程,然后结合实际工程对预应力锚索不同工作状态进行分析讨论。结果表明:不同状态下锚固段剪应力沿轴向分布不同,最大剪应力逐渐向锚固段内侧转移,在弹性变形阶段之后剪应力达到峰值此后保持不变;预应力锚索进入残余变形阶段后,塑性区长度不再发生变化。研究结果可为预应力锚索的设计和工程应用提供理论依据。In order to research the shearing stress distribution of anchored section,based on the shearing displacement structure of B. Benmokrane＇s three stage linear functions of relationship between the anchoring body and borehole wall face,we adopt the load transmission method to research the distribution law of shear stress along the length direction of anchor blot direction. Then combined with the actual project,the different working states of pre-stressed anchor cable are analyzed and discussed. The results show that： The shear stress along the axial are different in different states. The maximum shear stress gradually shifts to the inner anchoring section and the peak stress will not change after the elastic deformation stage; The length of the plastic zone will not change after the pre-stressed anchor enters the stage of residual deformation. The study is of a reference for pre-stressed anchor design and application.

关 键 词：预应力锚索 内锚固段 剪应力分布 极限承载力 

分 类 号：TD353[矿业工程—矿井建设]