Title:
Creep and Shrinkage Induced Deflections in RC Beams and Slabs
Author(s):
R. I. Gilbert
Publication:
Symposium Paper
Volume:
284
Issue:
Appears on pages(s):
1-16
Keywords:
cracking; creep; curvature; deflection; serviceability; shrinkage; tension stiffening; time-dependent
DOI:
10.14359/51683808
Date:
3/1/2012
Abstract:
The effects of creep and shrinkage on the time-dependent behavior of reinforced concrete flexural members are discussed and a procedure for the prediction of the long-term deflection of reinforced concrete beams and slabs is presented. The time-dependent deformations caused by creep and shrinkage are modeled using tractable formulations developed using the age-adjusted effective modulus method of analysis. The procedure includes the time varying nature of tension stiffening and the effects of time-dependent shrinkage-induce cracking. Sample calculations are provided. The method is validated against a wide range of test data and is shown to provide reliable estimates of in-service deformations.