Research on shear failure mechanism of free section of prestressed anchor cables

被引：0
|
作者：
Feng C. [1 ,2 ]
Liu S. [1 ,3 ]
Fu M. [1 ]
Lyu Q. [2 ]
He D. [1 ]
He Y. [1 ]
机构：
[1] School of Energy Science and Engineering, Henan Polytechnic University, Henan, Jiaozuo
[2] School of Architecture and Civil Engineering, Anyang Institute of Technology, Henan, Anyang
[3] Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Henan Polytechnic University, Henan, Jiaozuo
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2024年 / 43卷 / 06期
基金：
中国国家自然科学基金;
关键词：
free section of anchor cable; mechanical model; numerical simulation; rock mechanics; rock support; shear failure;
D O I：
10.13722/j.cnki.jrme.2023.0802
中图分类号：
学科分类号：
摘要：
End-anchored prestressed anchor cables, as an effective and economical reinforcement method, are widely used in rock support applications. Shear failure for the free section of end-anchored anchor cables is a common failure type of anchor cables in engineering practice. Its failure mechanism differs from that of full length anchoring cables, which requires further in-depth research. By using the research methods of laboratory test, theoretical analysis and numerical simulation, the characteristics of shear failure in the free section of anchor cables were clarified, and the mechanical mechanism and micro-evolution laws of shear failure in prestressed anchor cables were revealed. The study showed that the shear action on joint surfaces caused coupled growth of axial and shear forces inside the anchor cable, and the steel strands at the fracture exhibited both tensile and shear failure modes. The axial force and shear force in the anchor cable at the inflection point were positively correlated. Based on the combined tensile-shear failure criterion, the mechanism of shear failure in anchor cables was well explained. During the shear process, there were both tensile stress concentration area and tensile-shear composite stress concentration area. Shear damage on the surface of the outer steel strands of the anchor cable resulted in earlier failure, and the evolution law of internal forces in the anchor cable confirms that shear failure in the anchor cable was a combination of tension and shear failure. The research results provide a reference for the development of anchor cable support technology. © 2024 Academia Sinica. All rights reserved.
引用
收藏
页码：1468 / 1479
页数：11
相关论文
共 27 条
  • [1] KANG Hongpu, Sixty years development and prospects of rock bolting technology for underground coal mine roadways in China, Journal of China University of Mining and Technology, 45, 6, pp. 1071-1081, (2016)
  • [2] KANG Hongpu, Seventy years development and prospects of strata control technologies for coal mine roadways in China, Chinese Journal of Rock Mechanics and Engineering, 40, 1, pp. 1-30, (2021)
  • [3] LIU S, HE D, JIA H, Et al., Anchoring eccentricity features and rectifying devices for resin grouted bolt/cable bolt[J], International Journal of Mining Science and Technology, 32, 5, pp. 1059-1073, (2022)
  • [4] SHAN Renliang, PENG Yanghao, KONG Xiangsong, Et al., Research progress of coal roadway support technology at home and abroad, Chinese Journal of Rock Mechanics and Engineering, 38, 12, pp. 2377-2403, (2019)
  • [5] SHAN Renliang, TONG Xiao, HUANG Pengcheng, Et al., Research on the anchor cable with c-shaped tube and its mechanical properties, Rock and Soil Mechanics, 43, 3, pp. 602-614, (2022)
  • [6] AZIZ N, MIRZAGHORBANALI A, NEMICK J, Et al., Shear strength properties of plain and spirally profled cable bolts[J], Canadian Geotechnical Journal, 52, 10, pp. 1490-1495, (2015)
  • [7] AZIZ N, MIRZAGHORBANALI A, NEMICK J, Et al., Load transfer characteristics of plain and spiral cable bolts tested in new non rotating pull testing apparatus, Coal Operators' Conference, pp. 32-39, (2016)
  • [8] AZIZ N, RASEKH H, MIRZAGHORBANALI A, Et al., An experimental study on the shear performance of fully encapsulated cable bolts in single shear test, Rock Mechanics and Rock Engineering, 51, 7, pp. 2207-2221, (2018)
  • [9] LI X, AZIZ N, MIRZAGHORBANALI A., Behavior of fiber glass bolts, rock bolts and cable bolts in shear, Rock Mechanics Rock Engineering, 49, 7, pp. 2723-2735, (2016)
  • [10] LI X, NEMCIK J, MIRZAGHORBANALI A, Et al., Analytical model of shear behaviour of a fully grouted cable bolt subjected to shearing, International Journal of Rock Mechanics and Mining Sciences, 80, pp. 31-39, (2015)
123