基于Mindlin位移解的全长粘结锚杆锚固段剪应力分析  

An analysis of the shear stress distribution in the internal anchorage section of full-length injected bolts based on Mindlin＇ s displacement solutions

作　　者：董宏晓[1] 范俊奇[1,2] 李燃[1] 赵健[1] 张海龙 

机构地区：[1]总参工程兵科研三所,洛阳471023 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]南疆军区设防工程办公室,喀什844200

出　　处：《防护工程》2012年第6期29-33,共5页Protective Engineering

基　　金：国家自然科学基金资助项目（51278492）

摘　　要：根据模型试验所得锚杆体轴应变试验结果，在Mindlin问题位移解的基础上，通过一定的简化假设，推导了全长粘结锚杆锚固段受力的理论解和锚杆体轴力以及第一、第二界面剪应力分布公式。研究分析了不同强度类型介质中内锚固段应力、轴力及交界面的剪应力传递、衰减规律。探讨了介质强度对锚固段剪应力的影响。并将其结果与模型试验结果进行了对比分析，结果表明，理论解与试验结果基本吻合。本文的研究为分析以锚杆为代表的锚固结构内锚固段剪应力分布提供了参考依据。Based on Mindlin＇ s displacement solutions and some simplified assumptions, the analytic solution and the axial force formula of the anchorage section and the stress distribution formula on the first and second interfaces of the full-length injected bolt（FIB） are deduced. The axial stress, transmission law, and attenuation characteristics of the shear stress of the internal anchorage section of the FIB in homogeneous media are studied. The influence of medium strength on the shear stress of the internal anchorage section of the FIB is discussed. The analytic solution of the bolts is derived and compared with the results from the test. It indicates that the analytic solution agrees with the results from the test in the main. A reference principle for the analysis of the shear stress on the first and second in- terfaces of the anchorage section is provided through model tests.

关 键 词：全长粘结锚杆 内锚固段 剪应力分布 衰减特征 理论解 

分 类 号：TU312.1[建筑科学—结构工程]