Numerical analysis of debonding mechanism in bonded concrete overlay according to horizontal traffic loading

摘要

Debonding failures of bonded concrete overlay occur due to the loss of bonding, excessive normal tensile stresses, or horizontal shear stresses at the interface. Generally the normal tensile stress may be main cause of debonding. However, horizontal shear stress caused by stopping and starting of vehicle at the traffic congested section and toll booth can lead debonding. In this study, a set of numerical analysis was performed to evaluate the horizontal shear stress at the interface of bonded concrete overlay according to horizontal traffic loading. It was found that horizontal shear stresses were closed to the bond strength criterion. (C) 2016 Elsevier Ltd. All rights reserved.