THE EFFECT OF CONSTRUCTION JOINTS ON THE PERFORMANCE OF REINFORCED CONCRETE BEAMS

The load/deflection and ultimate moment characteristics of a simply supported beam are not impaired by the presence of a construction joint in a region where shear is negligible; measurements of deflection and crack width indicate similar overall performance for jointed and unjointed beams. In a region where shear is significant, a construction joint with a smooth surface reduces the beam's shear capacity, but a beam having a joint with a roughened surface has a mode of failure similar to that of an unjointed member and a similar ultimate load. Where reinforcement is lapped or spliced at construction joints, tests show that lack of attention to detailing can result in a marked reduction in ultimate moment.

• Corporate Authors:

  Cement and Concrete Association

  52 Grosvenor Gardens
  London SW1W 0AQ,   England 
• Authors:
  • Monks, W L
  • Sadgrove, M A
• Publication Date: 1973-12

Media Info

• Features: Figures; References; Tables;
• Pagination: 19 p.

Subject/Index Terms

• TRT Terms: Beams; Construction joints; Cracking; Deflection; Load factor; Material reinforcement; Shear strength
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00262899
• Record Type: Publication
• Report/Paper Numbers: No. 42.483 Tech Rpt.
• Files: TRIS
• Created Date: Nov 20 1974 12:00AM