EXPERIMENTAL STUDY ON STATIC AND DYNAMIC COMPRESSION MECHANICAL PROPERTIES OF FILLED ROCK JOINTS

SHAOBO CHAI; HAO WANG; LIYUAN YU; JIEHUI SHI; ERDI ABI

doi:10.1590/1679-78255988

EXPERIMENTAL STUDY ON STATIC AND DYNAMIC COMPRESSION MECHANICAL PROPERTIES OF FILLED ROCK JOINTS

Authors

SHAOBO CHAI SCHOOL OF CIVIL ENGINEERING, CHANG’ AN UNIVERSITY, XI’AN, 710064, CHINA / STATE KEY LABORATORY FOR GEOMECHANICS AND DEEP UNDERGROUND ENGINEERING, CHINA UNIVERSITY OF MINING & TECHNOLOGY, XUZHOU, 221116, CHINA / SCHOOL OF RIVER & OCEAN ENGINEERING, CHONGQING JIAOTONG UNIVERSITY, CHONGQING, 400045, CHINA HTTPS://ORCID.ORG/0000-0002-7773-2678
HAO WANG SCHOOL OF CIVIL ENGINEERING, CHANG’ AN UNIVERSITY, XI’AN, 710064, CHINA HTTPS://ORCID.ORG/0000-0002-2501-3225
LIYUAN YU STATE KEY LABORATORY FOR GEOMECHANICS AND DEEP UNDERGROUND ENGINEERING, CHINA UNIVERSITY OF MINING & TECHNOLOGY, XUZHOU, 221116, CHINA HTTPS://ORCID.ORG/0000-0002-8973-7476
JIEHUI SHI SCHOOL OF CIVIL ENGINEERING, CHANG’ AN UNIVERSITY, XI’AN, 710064, CHINA HTTPS://ORCID.ORG/0000-0002-5620-5166
ERDI ABI SCHOOL OF RIVER & OCEAN ENGINEERING, CHONGQING JIAOTONG UNIVERSITY, CHONGQING, 400045, CHINA HTTPS://ORCID.ORG/0000-0001-5203-0349

DOI:

https://doi.org/10.1590/1679-78255988

Abstract

THE STATIC AND DYNAMIC COMPRESSION MECHANICAL PROPERTIES OF THE PREFABRICATED ARTIFICIAL FILLED ROCK JOINTS SPECIMENS WITH DIFFERENT FILLINGS AND DIFFERENT JOINT THICKNESSES ARE TESTED BY UNIVERSAL TESTING MACHINE AND SHPB DEVICE, RESPECTIVELY. THEN, THE STRENGTH CHARACTERISTICS, DEFORMATION CHARACTERISTICS, WAVE PROPAGATION CHARACTERISTICS AND ENERGY DISSIPATION LAWS OF THE FILLED JOINTS UNDER STATIC COMPRESSION AND DYNAMIC IMPACT ARE ANALYZED. THE EXPERIMENTAL RESULTS SHOW THAT THE STATIC AND DYNAMIC COMPRESSION STRENGTH OF FILLED JOINTS INCREASES WITH THE STRENGTH OF FILLING MATERIALS WHILE DECREASES WITH THE THICKNESS OF THE FILLED JOINTS. THE DEFORMATION CHARACTERISTICS OF FILLED JOINTS UNDER STATIC AND DYNAMIC COMPRESSION ARE POSITIVELY CORRELATED WITH THE PROPERTIES OF FILLING MATERIALS AND THE THICKNESS OF FILLED JOINTS. FOR A CERTAIN INCIDENT WAVE, WITH THE INCREASING OF THE THICKNESS OF FILLED JOINT, THE AMPLITUDE OF REFLECTED WAVE INCREASES WHILE THAT OF THE TRANSMITTED WAVE DECREASES. WITH THE INCREASE OF THE STRENGTH OF THE FILLINGS, THE AMPLITUDE OF REFLECTED WAVE DECREASES WHILE THAT OF TRANSMITTED WAVE INCREASES. THE ENERGY DISSIPATION RATIO DECREASES WITH THE INCREASE OF THE THICKNESS OF THE FILLED JOINT AND INCREASES WITH THE INCREASE OF THE STRENGTH OF THE FILLING MATERIAL.

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Published

2020-03-17

Issue

Vol. 17 No. 3 (2020)

Section

Articles

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