Title:
Bond Stress Model for Fiber Reinforced Concrete Based on Bond Stress-Slip Relationship
Author(s):
George Nammur Jr.. and Antoine E. Naaman
Publication:
Materials Journal
Volume:
86
Issue:
1
Appears on pages(s):
45-57
Keywords:
bond (concrete to reinforcement); bond stress; metal fibers; cracking (fracturing); fiber reinforced concretes; pullout tests; shear stress; slippage; tension; Materials Research
DOI:
10.14359/1845
Date:
1/1/1989
Abstract:
Deals primarily with bond in fiber reinforced concrete. Beginning with a brief review of studies on bond in reinforced and prestressed concrete and a summary of analytical models developed by different researchers, it then moves on to bond in fiber reinforced concrete. A comparison between interfacial properties of reinforced concrete and fiber reinforced concrete (FRC) is drawn, followed by a review of the experimental work that has hitherto been done on bond in FRC, as well as the related major findings. An analytical model of the bond shear stresses at the fiber-matrix interface in a pure tensile FRC specimen is then derived. The model predicts the shear stress distribution along the fiber-matrix, the slip distribution, and the normal tensile stresses in the fiber and the matrix. The model presumes a knowledge of the relationship between the bond shear stress and the slip for the given matrix and reinforcement. Perfect alignment of the fibers as well as square packing are also assumed. The model is finally used to predict numerically the bond shear stress in a given tension composite using a specific bond-slip curve.