Modelling of Bond-slip between Prestressed Strands and Concrete at Elevated Temperatures

Abstract

In this paper a new analytical model has been developed to simulate the average bond stress-slip relationship between strand and concrete for prestressed concrete structural members. Two different bond-slip curves have been proposed to represent the bond-slip characteristics for the three-wire and seven-wire strands. The model is able to take into account the type of strand surface, smooth or indented. The degradation of materials and bond characteristic at elevated temperatures are also considered in the model. The proposed model is validated against previous experimental results at ambient and elevated temperatures.