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Open Access

Experimental Study on the Influence of Joint Surface Topography on Dynamic Mechanical Property of Joint

Lifan Rong1,2( ), Jinlin Hu2, Wei Li3, Shengnan Hong4
Collaborative Innovation Center for Performance and Security of Large-Scale Infrastructure, Shijiazhuang Tiedao University, Shijiazhuang 050043, P. R. China
School of Safety Engineering and Emergency Management, Shijiazhuang Tiedao University, Shijiazhuang 050043, P. R. China
School of Civil Engineering and Architecture, Linyi University, Linyi, Shandong 276000, P. R. China
University of Chinese Academy of Science, Beijing 100049, P. R. China
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Abstract

For compressively evaluate the influence of joint surface topography on dynamic normal mechanical property of joint, a new joint surface topography generation method is proposed, and 30 joint morphologies under the combination of 6 kinds of joint roughness and 5 kinds of joint matching degree are generated base on Full Factorial DOE. According to the generated joint morphologies, 30 joint specimens are prepared by using 3D print and Cement mortar pouring method. SHPB equipment is used to carry out a series of impact compression tests on the joint specimens, and dynamic stress-closure curves of joint with different morphologies are obtained. Correlation analysis on joint matching degree, joint roughness and joint dynamic mechanic parameters is carried out, and the result shows that joint dynamic stiffness decreases with the decreasing of joint matching degree and roughness, the influence of joint matching degree on joint dynamic mechanical property is greater than that of joint roughness. The influence of joint matching degree and joint roughness on joint initial stiffness can be cumulated, and the interaction effect of joint matching degree and joint roughness has influence on joint max closure.

Keywords

jointdynamic mechanical propertyjoint matching degreejoint roughness
CLC number: U25 Document code: A Article ID: 1673-0836(2023)04-1149-11

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Chinese Journal of Underground Space and Engineering
Volume 19 Issue 4,
August 2023
Pages 1149-1159
DOI: 10.20174/j.juse.2023.04.012

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Cite this article:
Rong L, Hu J, Li W, et al. Experimental Study on the Influence of Joint Surface Topography on Dynamic Mechanical Property of Joint. Chinese Journal of Underground Space and Engineering, 2023, 19(4): 1149-1159. https://doi.org/10.20174/j.juse.2023.04.012

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Received: 10 December 2022
Published: 01 August 2023
© 2023 Chinese Journal of Underground Space and Engineering

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).