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

作　　者：Chenlu Wang Luobin Zheng Liangqing Wang Linfeng Zhu Shanbai Wu Shan Deng 

机构地区：[1]Faculty of Engineering,China University of Geosciences,Wuhan 430074,China

出　　处：《Journal of Earth Science》2024年第5期1626-1639,共14页地球科学学刊（英文版）

基　　金：funded by the National Natural Science Foundation of China(Nos.41931295,41877258);the China Postdoctoral Science Foundation(No.2022M712953);the Open foundation of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection(No.SKLGP2022K001);the China Three Gorges Corporation(No.2019073)。

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 conducted 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 agreement with the experimental results.

关 键 词：rock bolt shear strength bolt contribution mechanical property engineering geology 

分 类 号：TU476[建筑科学—结构工程]