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A new analytical solution to the mechanical behaviour of fully grouted rockbolts subjected to pull-out tests

Abstract : A new analytical approach able to predict the mechanical behaviour of fully grouted rockbolts subjected to pull-out tests is proposed in this paper. Input parameters of such approach are: bolt radius, bolt's Young modulus, displacement of the free end of the bolt and the constitutive law of the rockbolt-grout joint interface. The limited circumstances under which it is accurate to determine such constitutive law from pull-out tests are also presented. A solution for the load-displacement curve obtained during pullout tests has been developed and is detailed in the case of a tri-linear bond-slip model. Comparison with experimental results obtained via in situ pull-out tests has led to the validation of this approach
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Contributor : Michel Tijani <>
Submitted on : Tuesday, October 19, 2010 - 3:20:45 PM
Last modification on : Thursday, September 24, 2020 - 4:34:06 PM
Long-term archiving on: : Thursday, January 20, 2011 - 2:28:16 AM

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Laura Blanco Martin, Faouzi Hadj Hassen, Michel Tijani. A new analytical solution to the mechanical behaviour of fully grouted rockbolts subjected to pull-out tests. Construction and Building Materials, Elsevier, 2010, 25 (2), pp.1-7. ⟨10.1016/j.conbuildmat.2010.07.011⟩. ⟨hal-00526686⟩

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