Analysis of Pullout Tests for Planar Reinforcements in Soil
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Volume 121, Issue 6
Abstract
This paper describes a new analysis for predicting the tensile stress distribution and load-elongation response in pullout tests performed on thin, extensible, planar soil reinforcements. The proposed formulation is based on shear-lag approximations and assumes elastic properties of the constituent materials (soil and reinforcement), which are linked through a frictional interface. The analysis identifies four successive phases in the pullout response: (1) initial, linear behavior, characterized by a buildup of interface tractions at the active, loading end of the inclusion; (2) nonlinear load-elongation response associated with the progression of a sliding front from the active end; (3) peak pullout resistance, when the interface friction is fully mobilized at the passive end of the inclusion; (4) postpeak reduction in pullout resistance due to a snap-through mechanism, with coalescence of sliding fronts from the active and passive ends of the inclusion. The principal parameters affecting the load-elongation response during pullout are the relative soil-reinforcement stiffness, inclusion length, and interface friction. The proposed analysis shows important limitations in applying limit equilibrium calculations for interpreting interface friction from pullout tests on extensible reinforcements.
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Published In
Journal of Geotechnical Engineering
Volume 121 • Issue 6 • June 1995
Pages: 476 - 485
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Copyright © 1995 American Society of Civil Engineers.
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Published online: Jun 1, 1995
Published in print: Jun 1995
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