Design Implications of Creep and Long-Term Deflections in FRP-RC Beam-Columns


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Design Implications of Creep and Long-Term Deflections in FRP-RC Beam-Columns

Author(s): A. Mirmiran, H. Erdogan, and A. Singhvi

Publication: Special Publication

Volume: 264


Appears on pages(s): 163-178

Keywords: beam-column; creep; fiber-reinforced polymer (FRP); long-term deformations; modeling.

Date: 10/1/2009

While most studies have focused on short term behavior of fiber reinforced polymer (FRP)-reinforced concrete (RC) members, it is important and necessary to study their time-dependent behavior, if FRP is to be used as a viable alternative reinforcement for the infrastructure. The present study provides an analytical tool to assess serviceability issues of FRP-RC beam-columns under sustained loads. The analytical model accounts for creep of FRP-RC beams and beam-columns. The model is based on age-adjusted effective modulus method for concrete and Findlay’s model for FRP reinforcement. The model has been verified against the FRP-RC beam tests by the authors, as well as those from the literature. A detailed parametric study is then carried out to determine the effects of different types of FRP reinforcing bars on the creep of slender FRP-RC columns, and whether the ACI 318 design provisions for creep of slender RC columns is adequately safe for FRP-RC construction.