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

作者：Martin Laura Blanco^*; Tijani Michel; Hadj Hassen Faouzi

来源：Construction and Building Materials, 2011, 25(2): 749-755.

DOI：10.1016/j.conbuildmat.2010.07.011

• Analytical solution
• Bond-slip model
• Fully grouted rockbolts
• Joint interface
• Pull-out test

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 pull-out 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.

• 出版日期2011-2