On the probable moment strength of reinforced concrete columns

The probable moment strength (or flexural overstrength, as it is also known) is the theoretical maximum flexural strength that can be calculated for the critical section of a member, with or without axial load, subjected to bending in a given direction. In ACI 318, this strength is needed to capacity-design beams, columns of special-moment frames, and columns not designated as part of the seismic-resisting system. Supported on a column database, this paper provides evidence that the current method prescribed by ACI 318 to calculate this strength has a clear nonconservative bias and explains the reasons for this. To improve predictability, the authors propose a very simple, statistically calibrated mechanics model for determining the probable moment strength of rectangular and circular columns. An extension of the concept is made for computing the probable moment strength of rectangular columns subjected to bending along the two principal axes.

• Record URL:
  http://www.concrete.org/Publications/InternationalConcreteAbstractsPortal.aspx.aspx?m=details&i=51685753
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846957
• Supplemental Notes:
  • Abstract reprinted with permission from the American Concrete Institute
• Authors:
  • Restrepo, Jose I
  • Rodriguez, Mario E
• Publication Date: 2013-7-1

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Glossary; References;
• Pagination: pp 681-690
• Serial:
  • ACI Structural Journal
  • Volume: 110
  • Issue Number: 4
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-3241
  • Serial URL: http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP

Subject/Index Terms

• TRT Terms: Axial loads; Beams; Columns; Design capacity; Flexural strength; Reinforced concrete
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I20: Design and Planning of Transport Infrastructure; I32: Concrete;

Filing Info

• Accession Number: 01486599
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 26 2013 12:55PM