Title:
Computing Deflections Using ACI CODE-318-19 and Beyond, Part 1
Author(s):
Peter H. Bischoff
Publication:
Concrete International
Volume:
47
Issue:
2
Appears on pages(s):
47-50
Keywords:
moment, member, limit, thickness
DOI:
10.14359/51745615
Date:
2/1/2025
Abstract:
The is the first article in a five-part series on calculating deflections for members not meeting minimum thickness requirements in accordance with ACI CODE-318-19. This article reviews the procedure and uncertainty for computing deflection of reinforced (nonprestressed) concrete flexural members.
Related References:
1. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19),” American Concrete Institute, Farmington Hills, MI, 2019, 624 pp.
2. ACI Committee 435, “Report on Deflection of Nonprestressed Concrete Structures (PRC-435-20),” American Concrete Institute, Farmington Hills, MI, 2020, 56 pp.
3. Scanlon, A., and Bischoff, P.H., “Shrinkage Restraint and Loading History Effects on Deflections of Flexural Members,” ACI Structural Journal, V. 105, No. 4, July-Aug. 2008, pp. 498-506.
4. Wight, J.K., and MacGregor, J.G., Reinforced Concrete: Mechanics and Design, sixth edition, Pearson College Div, Upper Saddle River, NJ, 2011, 1157 pp.
5. Bischoff, P.H., “Rational Model for Calculating Deflection of Reinforced Concrete Beams and Slabs,” Canadian Journal of Civil Engineering, V. 34, No. 8, Aug. 2007, pp. 992-1002.
6. Ghali, A., “Deflection of Reinforced Concrete Members: A Critical Review,” ACI Structural Journal, V. 90, No. 4, July-Aug. 1993, pp. 364-373.
7. CSA A23.3:24, “Design of Concrete Structures,” CSA Group, Toronto, ON, Canada, 2024, 335 pp.
8. Branson, D.E., Deformation of Concrete Structures, McGraw-Hill, New York, NY, 1977, 546 pp.