Effects of the Tensile and Shear Properties of Bolts on the Shear Properties of Bolted Rock Joints

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外文摘要：The mechanical properties of bolts are important factors affecting the shear behavior of bolted joints.In this study,tensile and pure shear tests were conducted on five kinds of bolts made from different materials to measure their tensile and shear parameters.Direct shear tests were conduct-ed to analyze the effects of tensile and shear strength parameters on the shear behavior of bolted joints.The test results showed that the mechanical properties of bolts made from different materials were clearly different and that these differences mainly affected the plastic deformation stage of the bolted joints.The larger the bolt elongation was,the larger the joint shear displacement at bolt failure.The tensile and shear strengths of the bolts were positively correlated with the shear strength of the bolted joints.According to the standard regression analysis,the bolt shear strength had a greater influence than the bolt tensile strength on the bolt contributions when the bolts were perpendicular to the joint surface.Based on the empirical equation for the bolt contribution proposed by Spang,the maximum shear loads in the pure shear test were introduced,and a new equation was established to predict the contributions of bolts.The prediction results obtained using the modified equation were in good agree-ment with the experimental results.

外文关键词：

rock boltshear strengthbolt contributionmechanical propertyengineering geology

作者：

Chenlu Wang、Luobin Zheng、Liangqing Wang、Linfeng Zhu、Shanbai Wu、Shan Deng

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作者单位：

Faculty of Engineering,China University of Geosciences,Wuhan 430074,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChina Postdoctoral Science FoundationOpen foundation of State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionChina Three Gorges Corporation

项目编号：

41931295418772582022M712953SKLGP2022K00 12019073

出版年：

2024

DOI：

10.1007/s12583-022-1749-3

地球科学学刊(英文版)

中国地质大学

地球科学学刊(英文版)

CSTPCD

影响因子：0.724

ISSN：1674-487X

年,卷(期)：2024.35(5)