Title:
Instantaneous and Long-Time Deflections of Reinforced Concrete Beams Under Working Loads
Author(s):
Wei-Wen yu and George Winter
Publication:
Journal Proceedings
Volume:
57
Issue:
7
Appears on pages(s):
29-50
Keywords:
none
DOI:
10.14359/8010
Date:
7/1/1960
Abstract:
The availability of high strength steels and concretes and the acceptance of ultimate strength design have made it possible to-utilize much shallower flexural members than the wst. The laraer deflections of such members make it imperative for the designer to possess si mple and reliable methods for pre -computing the expected deflections. This refers not only to deflections immediately upon load application, but also, and particularly, to long-time deflections under sustained loads. This paper presents two simple methods, each, for calculating instantaneous and long-time deflections under service loads. The methods are checked against the results of 175 deflection tests from nine different investigations. Agreement is found to be uniformly satisfactory for design purposes.