Title:
Early-Age Loading and Long-Term Deflections of
Reinforced Concrete Beams
Author(s):
D. V. Rosowsky, M. G. Stewart, and E. H. Khor
Publication:
Structural Journal
Volume:
97
Issue:
3
Appears on pages(s):
517-524
Keywords:
construction loads; creep; deflection; early-age effects; flexur-al
members; probabilistic analysis; reinforced concrete; serviceability;
shrinkage; time-dependent behavior.
DOI:
10.14359/4647
Date:
5/1/2000
Abstract:
This paper examines the effects of early-age (construction) loads on the long-term deflections of reinforced concrete (RC) flexural mem-bers. Particular consideration is given to simply supported, singly reinforced rectangular beams. The probabilistic analysis of time-dependent deflections takes into account concrete maturation, nonlin-ear creep and shrinkage behavior, and load process models for both service and construction. While this paper summarizes the time-dependent analysis technique (reported in detail elsewhere), the focus of this paper is on evaluating the effects of early-age loading on the long-term deflection and on practical implications for deflection ser-viceability design of RC members.