Bond-Slip Model for Detailed Finite-Element Analysis of Reinforced Concrete Structures

作者：Murcia Delso Juan^*; Shing P Benson

来源：Journal of Structural Engineering, 2015, 141(4): 04014125.

DOI：10.1061/(ASCE)ST.1943-541X.0001070

• Bond slip
• Interface model
• Reinforced concrete
• Finite-element analysis
• Reinforcing bars
• Bond failure
• Analysis and computation

A new interface model to simulate the bond-slip behavior of reinforcing bars is presented. The model adopts a semiempirical law to predict the bond stress-versus-slip relations of bars, accounting for the bond deterioration caused by cyclic slip reversals, the tensile yielding of the bars, and the splitting of concrete. The wedging action of the ribs is represented by assuming that the normal stress of the interface is proportional to the bond stress. The model has been implemented in a finite-element analysis program and has been validated with laboratory experiments that include monotonic and cyclic bond-slip and anchorage tests of bars with different embedment lengths and a test on an RC column subjected to cyclic lateral loading. The model is easy to calibrate and computationally efficient, and it accurately predicts the bond-slip behavior of bars embedded in well-confined concrete. It also simulates bond failure attributable to the splitting of concrete in an approximate manner.

• 出版日期2015-4