Title:
Design Implications of Creep and Long-Term
Deflections in FRP-RC Beam-Columns
Author(s):
A. Mirmiran, H. Erdogan, and A. Singhvi
Publication:
Symposium Paper
Volume:
264
Issue:
Appears on pages(s):
163-178
Keywords:
beam-column; creep; fiber-reinforced polymer (FRP); long-term
deformations; modeling.
DOI:
10.14359/51663266
Date:
10/1/2009
Abstract:
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.