文献类型：期刊文献

英文题名：Reinforcing effects of 3D printed bolts on joint-separated standard soft rock specimens

作者：Feng, Xiaowei[1];Xue, Fei[2];Wang, Tianzhuo[2];Wang, Linxiang[2];Zhao, Tongyang[2];Liu, Xiaoxia[2]

机构：[1]China Univ Min & Technol, Sch Mines, State Key Lab Coal Resources & Safe Min, Xuzhou 221116, Jiangsu, Peoples R China;[2]Shaoxing Univ, Coll Civil Engn, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Zhejiang, Peoples R China

年份：2020

卷号：193

外文期刊名：COMPOSITES PART B-ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000531097400026)、、EI(收录号：20201508407216)、Scopus(收录号：2-s2.0-85082944387)、WOS

基金：The authors would like to acknowledge the financial support for this study from the Fundamental Research Funds for the Central Universities (2020QN41). The contributions of master's student Mingkun Wang are greatly appreciated. Four anonymous reviewers provided many valuable comments on this manuscript, which were thoughtful and insightful; it would have been impossible for the study to have been improved without those comments.

语种：英文

外文关键词：Joint; 3D printing; Digital image correlation; Standard rock specimens; Uniaxial compression test

外文摘要：Many studies have used numerical models, analytical models and laboratory models to investigate the factors influencing the shear strength of bolted rock joints. This study presents the preparation of a reinforced standard cylindrical specimen containing a joint; the jointed specimen was reinforced with a 3D printed (3DP) rock bolt and planting-bar anchorage glue. The surface profile of the 3DP rock bolt was identical to that of an actual rock bolt, and the strength of the 3DP bolt was satisfactory. Afterwards, the digital image correlation (DIC) method was applied to capture the changes in the strain/displacement fields on the surfaces of the specimens during testing. In addition, two pressure sensors (PSs) were attached to the external threaded sections of each 3DP bolt; these PSs recorded the changes in the load at the bolt ends positioned in the upper section above the joint plane and in the lower section below the joint plane. The influences of the joint plane and joint angle on the cracking process, DIC changing pattern, and stress-strain evolution were comprehensively discussed. The research approaches proposed in this study provide new methods with which to investigate the reinforcement effect of bolts on jointed rock masses, the results of this study can be used as a reference in engineering areas where jointed rock masses must be reinforced by rock bolts.