Determination of boundary effect on shear fracture energy at steel bar–concrete interface. (March 2016)

• Record Type: Journal Article
• Authors: Yang, Shutong; Chen, Yujia; Du, Derun; Fan, Guoxi
• Is Part Of: Engineering fracture mechanics. Volume 153(2016)
• Page Start: 319
• Page End: 330
• Publication Date: 2016-03
• Subjects: Concrete -- Steel bar -- Shear fracture energy -- Maximum pull-out load -- Boundary effect; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2015.12.031
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: Correlation between pull-out load and interfacial fracture energy is established. We have obtained interfacial local shear fracture energy distribution analytically. Boundary effect on interfacial shear fracture energy is determined. Abstract: An analytical approach was proposed to predict the maximum pull-out load of steel bar from concrete, which is then related to the local fracture energy at the shear crack-tip region. Based on the comparisons between the analytically predicted and experimentally determined maximum pull-out loads under two extreme conditions, i.e., maximum crack-tip bridging with maximum fracture energy and zero crack-tip bridging with minimum fracture energy, the crack-tip local fracture energy indeed varies with the initial shear crack length. A tri-linear model was presented to well describe the local shear fracture energy distribution along the embedment length indicating the boundary effect.