Rock Bolt-Grout-Rock Interaction in Pullout Test and Determining Load-Displacement Curve of the Bolt Head

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Hazrati Aghchai Mousa; MAAREFVAND PARVIZ; Salari Rad Hossein

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Journal Paper

Paper Information

Journal: Amirkabir Journal of Civil Engineering Year:2021 | Volume:53 | Issue:3 Page(s): 879-896

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Information Journal Paper

Title

Rock Bolt-Grout-Rock Interaction in Pullout Test and Determining Load-Displacement Curve of the Bolt Head

Author(s)

Hazrati Aghchai Mousa | MAAREFVAND PARVIZ | Salari Rad Hossein

Keywords

Fully grouted Rock bolt

Pullout test

Bolt-Grout-Rock interaction

Analytical method

load-displacement curve

Abstract

The purpose of this paper is to investigate analytically the Fully grouted Rock bolt interaction with grout and rock in Pullout test and to determine the load-displacement curve of the bolt head (beginning of the bonded section). Usually, the Pullout test output is only the load-displacement curve. This paper discusses how to use this curve to determine the Bolt-Grout-Rock interaction. For modeling bolt-grout interface behavior, coupling (compete for bonding), partial decoupling, decoupling with the residual shear strength, and complete decoupling have been considered. With increasing the applied load, two possible cases including complete pullout and bolt shank yielding are considered. Based on experimental results, a model for the shear stress along a fully grouted bolt is assumed. According to this model, the distribution of axial stress in the bolt and displacement of the bolt head is determined. It is also assumed that the bolt is sufficiently long, which is usually used in underground excavations. Based on the presented Analytical method, the bolt head load-displacement curve is determined by assuming input parameters. This curve is compared with a Pullout test result.

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APA: Copy

Hazrati Aghchai, Mousa, MAAREFVAND, PARVIZ, & Salari Rad, Hossein. (2021). Rock Bolt-Grout-Rock Interaction in Pullout Test and Determining Load-Displacement Curve of the Bolt Head. AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR), 53(3 ), 879-896. SID. https://sid.ir/paper/1008226/en

Vancouver: Copy

Hazrati Aghchai Mousa, MAAREFVAND PARVIZ, Salari Rad Hossein. Rock Bolt-Grout-Rock Interaction in Pullout Test and Determining Load-Displacement Curve of the Bolt Head. AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR)[Internet]. 2021;53(3 ):879-896. Available from: https://sid.ir/paper/1008226/en

IEEE: Copy

Mousa Hazrati Aghchai, PARVIZ MAAREFVAND, and Hossein Salari Rad, “Rock Bolt-Grout-Rock Interaction in Pullout Test and Determining Load-Displacement Curve of the Bolt Head,” AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR), vol. 53, no. 3 , pp. 879–896, 2021, [Online]. Available: https://sid.ir/paper/1008226/en

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