Creep Effect Analysis of Concrete Beams Reinforced with FRP Sheets

The creep of concrete is an important factor interfering with normal work of concretes bridge structures. Fiber reinforced polymer (FRP) material is an important reinforcement material recently introduced to the civil engineering profession. Yet little attention has been paid to the influence of the long-term stress performance of the FRPs after reinforcement of the concrete structure. We are often faced with the situation that the creep of concrete has not yet completed when we are about to undertake the reinforcement and transformation of as structure. On the basis of summing up the general reinforced concrete creep theoretical calculation, the calculating method of creep effect of concrete beams reinforced with FRP material, is raised according to the Age-adjusted Effective Modulus Method (AEMM) of concrete. The creep will exercise an important influence over the stress re-distribution of the concrete, and the ordinary steel bars and the pre-stressed bars when both materials work coordinately.