Relationship between loading angle and displacing angle in steel bolt shearing  

剪切状态下锚杆变形加载角与位移角的关系（英文）

作　　者：Yu CHEN Ping CAO Ke-ping ZHOU Yun TENG 陈瑜;曹平;周科平;滕云(中南大学资源与安全工程学院,长沙410083;Department of Geology and Mineral Resources Engineering,Norwegian University of Science and Technology)

机构地区：[1]School of Resources and Safety Engineering, Central South University, Changsha 410083, China

出　　处：《Transactions of Nonferrous Metals Society of China》2017年第4期876-882,共7页中国有色金属学报（英文版）

基　　金：Projects(51604299,51274249,51474252)supported by the National Natural Science Foundation of China;Project(2016YFC0600706)supported by the State Key Research Development Program of China;Project(2015CX005);supported by the Innovation Driven Plan of Central South University,China;Project(2016M600636);supported by China Postdoctoral Science Foundation;Project supported by the Postdoctoral Science Foundation of Central South University,China

摘　　要：When subjected to shear loading condition,a steel rock bolt will become bent in the field close to the loading point in situ.The bolt is deformed as the joint displacement increases,which can mobilize a normal load and a shear load on the bolt accordingly.In this work,the relationship analysis between the displacing angle and loading angle is carried out.By considering elastic andplastic states of rock bolt during shearing,the rotation of bolt extremity can be calculated analytically.Thus,the loading angle isobtained from displacing angle.The verification of analytical results and laboratory results from reference research implies that theanalytical method is correct and working.In terms of in-situ condition,the direction of the load acting on steel bolt can be predictedwell according to the direction of the deformed rock bolt with respect to original bolt axis.在工程现场中,当锚杆处于剪切加载状态时,其在靠近加载点的位置会产生弯曲变形。在锚杆变形过程中,节理位移相应增大,并在杆体内部诱发法向拉力与横向剪力。本文作者对剪切状态下锚杆变形加载角与位移角的解析关系进行分析,通过考虑锚杆剪切过程中的弹性状态与塑性状态,锚杆段的扭转角可由解析方法导出,因此基于位移角相应求出加载角。通过与文献中实验数据对比,证明了所推导的解析解的正确性与可行性。在实际工程中,可根据锚杆的轴向变形方向确定其加载力方向。

关 键 词：steel rock bolt SHEAR displacing angle loading angle 

分 类 号：TD353.6[矿业工程—矿井建设]