Nonlinear Bond Model for the Dowel Action considering the Fatigue Damage Effect

Abstract

To investigate the mechanical properties of dowel action under fatigue loads, 3 reinforced concrete specimens with different bar diameters (12 mm, 20 mm, and 25 mm) were subjected to the fatigue loading and were designed to investigate the attenuation character of dowel action and the fatigue failure modes. e load transfer mechanism of the bond was analyzed based on the 3D relative motions between reinforcing bars and subgrade concrete. Fatigue damage effects were considered in the model. A deterioration coefficient based on the deformation path was defined to represent the accumulation of fatigue damage. Verification of the model was conducted by comparing the analysis results with experimental data obtained in this study and from the literature, and satisfactory agreement was obtained.

A positional formulation of the embedded bar with uniaxial, shear and flexural stiffness for the reinforced concrete analysis considering physical nonlinearities

“…In agreement with Moradi et al (2012) the investigation of such shear mechanism can be found on the literature from three different points of view: direct dowel test setups, divided beam test, and beam end test. The first two groups the dowel action mechanism is studied with little or no tension on the reinforcement (He et al 2017, Randl 2007, Ashour 1997, while the last one enables the analysis with the interactions between the tensile and dowel forces (Li et al 2018).…”

“…Xia et al (2015) examined the influence of dowel action in the ultra-high performance fiber reinforced concrete. Li et al (2018) investigated the mechanical properties of dowel action under fatigue loads.…”