文献类型：期刊文献

中文题名：Stress analysis of full-length grouted bolt under shear deformation of anchor interface

英文题名：Stress analysis of full-length grouted bolt under shear deformation of anchor interface

作者：Zhu Zheng-de[1];Shu Xiao-yun[1,2];Li Zhe[4];Tian Hong-ming[2];Tian Yun[3]

机构：[1]Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210024, Peoples R China;[2]Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China;[3]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[4]China Railway Design Corp, Tianjin 300251, Peoples R China

年份：2022

卷号：19

期号：11

起止页码：3286

中文期刊名：山地科学学报（英文）

外文期刊名：JOURNAL OF MOUNTAIN SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000886135800018)、CSTPCD、、CSCD2021_2022、Scopus(收录号：2-s2.0-85142247803)、WOS、CSCD、PubMed

基金：The research reported in this manuscript is funded by the Natural Science Foundation of China (Grants Nos. 52179113, 42207199, 41831278). The authors wish to acknowledge Professor of CHEN Weizhong, Institute of Rock and Soil Mechanics, for his help in interpreting the significance of the results of this study.

语种：英文

中文关键词：Full length grouted bolt;Neutral point;Interfacial shear stress;Bolt pull out condition;Normal working condition

外文关键词：Full length grouted bolt; Neutral point; Interfacial shear stress; Bolt pull out condition; Normal working condition

中文摘要：The bolt anchoring force is closely related to the shear properties of the anchor interface. The shear stress distribution of full-length grouted bolts is analyzed based on the stress-strain relationship among the bolt, grout, rock mass and bond interface,considering the shear properties of the grout and contact interface bonding behavior. In this case, the interfacial shear stress of the grout and rock mass and the bolt axial force are obtained under pull-out and normal working conditions. The results show that the peak shear stress of the interface with the shear deformation of the bond interface is significantly lower than that without it when the pull-out force is applied. When designing bolt parameters of grade IV and V rock mass, the relative deformation between the rock mass and anchor should be considered, with a “unimodal” to “bimodal” shear stress distribution.In the case of a low elastic modulus of rock masses,both the shear stress concentration and distribution range are obvious, and the neutral point is near the bolt head. As the elastic modulus increases, the shear stress concentration and distribution range are reduced, and the neutral point moves towards the distal end. As a result, the optimum length of fulllength grouted bolts can be determined by in-situ pull-out tests and decreases with the increased elastic modulus of the rock mass.

外文摘要：The bolt anchoring force is closely related to the shear properties of the anchor interface. The shear stress distribution of full-length grouted bolts is analyzed based on the stress-strain relationship among the bolt, grout, rock mass and bond interface, considering the shear properties of the grout and contact interface bonding behavior. In this case, the interfacial shear stress of the grout and rock mass and the bolt axial force are obtained under pull-out and normal working conditions. The results show that the peak shear stress of the interface with the shear deformation of the bond interface is significantly lower than that without it when the pull-out force is applied. When designing bolt parameters of grade IV and V rock mass, the relative deformation between the rock mass and anchor should be considered, with a "unimodal" to "bimodal" shear stress distribution. In the case of a low elastic modulus of rock masses, both the shear stress concentration and distribution range are obvious, and the neutral point is near the bolt head. As the elastic modulus increases, the shear stress concentration and distribution range are reduced, and the neutral point moves towards the distal end. As a result, the optimum length of full-length grouted bolts can be determined by in-situ pull-out tests and decreases with the increased elastic modulus of the rock mass.