Three-dimensional limit variation analysis on the ultimate pullout capacity of the anchor cables based on the Hoek-Brown failure criterion  

作　　者：ZUO Shi ZHAO Lianheng HU Shihong 

机构地区：[1]College of Civil Engineering,Changsha University,Changsha 410022,China [2]Hunan Provincial Key Laboratory for Disaster Prevention and Mitigation of Rail Transit Engineering Structure,Key Laboratory of Heavy-Haul Railway Engineering Structure,Ministry of Education,Central South University,Changsha 410075,China [3]College of Civil Engineering,Central South University,Changsha 410075,China

出　　处：《Journal of Mountain Science》2024年第3期1036-1047,共12页山地科学学报（英文）

基　　金：supported by the Natural Science Foundation of Hunan Province(2023JJ40078);the Scientific Research Project of Hunan Provincial Education Department(No.22C0573);the National Natural Science Foundation of China(51478477,51878668);Guizhou Provincial Department of Transportation Foundation(2017-122058);Foundation of Guizhou Provincial Science and Technology Department([2018]2815).

摘　　要：Only simplified two-dimensional model and a single failure mode are adopted to calculate the ultimate pullout capacity(UPC)of anchor cables in most previous research.This study focuses on a more comprehensive combination failure mode that consists of bond failure of an anchorage body and failure of an anchored rock mass.The three-dimensional ultimate pullout capacity of the anchor cables is calculated based on the Hoek-Brown failure criterion and variation analysis method.The numerical solution for the curvilinear function in fracture plane is obtained based on the finite difference theory,which more accurately reflects the failure state of the anchor cable,as opposed to that being assumed in advance.The results reveal that relying solely on a single failure mode for UPC calculations has limitations,as changes in parameter values not only directly impact the UPC value but also can alter the failure model and thus the calculation method.

关 键 词：Anchor cable Ultimate pullout capacity(UPC) Failure model Variation analysis Hoek-Brown failure criterion 

分 类 号：TU45[建筑科学—岩土工程]