Analytical Formulation on the Mechanical Behavior of Anchorage Interface for Full-Length Bonded Bolt

Abstract:

Based on the local deformation theory, we study the mechanics behavior of anchorage interface of full-length bonded rock bolt by using a mathematics model (tri-linear model). With pull-out load increasing, the changing process of anchorage interface of full-length bonded bolt is divided into three stages in this paper: elastic stage, plastic softening stage and crack slipping stage. It is found that in the state of elastic, axis force decreases rapidly with bolt depth increasing, and when pull-out load is greater than elastic ultimate load, attenuation degree will slow for the occurring of interface plastic softening and crack slipping in the top of bolt. The result indicates that the continuous change of axis force with bolt depth reflects that the bolt interface bond strength changes with the increase of pulling load.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 3254-3257
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.3254
• Online since: May 2012
• Authors: Bo Liu, Li Huang, Dong Yang Li
• Keywords: Bolt, Bond Strength, Mechanic Behavior, Pull-Out Load, Tri-Linear Model

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