Variability of Deflections of Simply Supported Reinforced Concrete Beams Supported Reinforced Concrete Beams

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • 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: Variability of Deflections of Simply Supported Reinforced Concrete Beams Supported Reinforced Concrete Beams

Author(s): ACI Committee 435

Publication: Journal Proceedings

Volume: 69

Issue: 1

Appears on pages(s): 29-35

Keywords: beams (supports); building codes: deflection; loads (forces); probability dis-tribution;functions; probability theory; reinforced concrete; structural design: variability.

Date: 1/1/1972

Abstract:
The variability of actual deflection of simply supported reinforced concrete beams with respect to deflection calculated by accepted methods is discussed. The probability of the deflection of a particular beam falling within a given level of uncertainty is evaluated by analyzing existing data and fitting a probability distribution to the data. Using deflection criteria of ACI 318-71, there is approximately a 90 percent chance that deflections of a particular beam will be within the range of 20 percent less than to 30 percent more than the calculated value. This represents a slight improvement over ACI 318-63.