An experimental study on shear behaviour of fully grouted rock bolt under static and dynamic loading conditions

Khaleghparast, Saman; Aziz, Naj; Remennikov, Alexander; Anzanpour, Sina

doi:10.1016/j.tust.2022.104915

Cited by 3 publications

(2 citation statements)

References 27 publications

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“…During the service period, rockbolts are often subjected to diferent loads, and the propagation of the loads in the rockbolts is a very complex process. For decades, many scholars have conducted extensive research on the load transmission behaviour of rockbolts [2][3][4][5][6][7][8][9]. Sun et al [2] considered the installation time and the length of the rockbolt, analysed the displacement process of a deep tunnel, and showed that increasing the length of the rockbolt from 2 m to 4 m in a 14 m high tunnel could reduce the tunnel wall displacement by 20%.…”

Section: Introductionmentioning

confidence: 99%

“…Teymen and Kilic [7] investigated the efect of the anchorage strength on the stress distribution in a full-length rockbolt and showed that the stress distribution on the rockbolt was more uniform with increasing anchorage strength and stifness. Khaleghparast et al [8] studied the shear strength of rockbolts under static and dynamic loading. Te results showed that using perforated steel tubes inside concrete blocks as internal confnement in the vicinity of shear planes prevented axial and radial cracking in the concrete, which enabled the rockbolt to undergo more shear than tension.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on the Load Transfer Behaviour and Bond-Slip Model of Fully Grouted Rockbolt

Yu,

Yang,

Chen

et al. 2023

Shock and Vibration

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Rockbolts are often subjected to loads during service, and the load transfer behaviour of rockbolts is very important. Therefore, in this study, pullout tests were performed on two kinds of rockbolt systems, with and without defects, and the load transfer behaviour and failure modes were analysed. According to the load transfer process between the rockbolt and cement mortar interface, a bond-slip model considering the yield of the rockbolt was proposed, and the nonlinear behaviour in the softening stage was considered. The test results showed that the evolution of the interface load between the rockbolt and cement mortar in the grouted rockbolt systems without defects underwent four stages of gradual failure, namely, elasticity, yield, softening, and complete slip, and its failure mode involved the rockbolt being pulled out accompanied by splitting cracks and tensile cracks on the concrete surface. The proposed bond-slip models considering the nonyielding and yielding of the rockbolt can accurately reflect the actual load transfer behaviour of a fully grouted rockbolt.

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