ABSTRACT
ABSTRACT: It is the basis that enough development length for Bond of Fiber Reinforced Polymer (BFRP) bars to concrete for guaranteeing the normal work of the structure. This paper analyzes the bond behavior of differential element of concrete with BFRP bars in pulled-out test, bases on the actual bond-slip constitutive law, accounts for the modified BPE model and establishes the theoretical formulas of the relative slipping difference between BFRP bars and concrete, the tensile stress of BFRP bars and the bond stress of BFRP bars. According to those theoretical formulas obtain the computational formula of the minimum development length of BFRP bars in the serviceability limit state; analyze and obtain the minimum development length of BFRP bars through using the datum in pulled-out test, compared with development length in the references show they are in good agreement.
