STRENGTH AND SERVICEABILITY OF INVERTED T-BEAM CAPS SUBJECT TO COMBINED FLEXURE, SHEAR, AND TORSION

Bent cap girders in the shape of an inverted T have been used with considerable success, particularly in structures at grade separations. Observations from 27 load tests on seven specimens, four of which were prestressed, indicated that the present American Concrete Institute and National Building Code of Canada procedures for assigning strength in flexural shear and torsion underestimated torsion strength by 50 percent. The tests also showed that prestressed concrete members exhibited under service loads less cracking and lower stresses in transverse reinforcement than did nonprestressed members with identical proportions. Recommended design procedures and equations for assessing strength were proposed. The recommendations can be applied for the design of transverse reinforcement in prestressed or nonprestressed beams.

  • Availability:
  • Supplemental Notes:
    • Sponsored by Texas State Dept of Highways P Public Transportation in Cooperation with FHWA.
  • Corporate Authors:

    University of Texas, Austin

    Center for Highway Research, 200 West 21st Street
    Austin, TX  United States  78712

    Federal Highway Administration

    Division of Planning and Research, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    Texas State Department of Highways & Public Transp

    Division of Planning and Research, P.O. Box 5051
    Austin, TX  United States  78763
  • Authors:
    • Furlong, R W
    • Mirza, S A
  • Publication Date: 1974-8

Media Info

  • Pagination: 89 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00095829
  • Record Type: Publication
  • ISBN: RR 153-1F
  • Report/Paper Numbers: FHWA-RD-75-S0401 Final Rpt.
  • Contract Numbers: 3-5-71-153
  • Files: NTIS, TRIS, USDOT, STATEDOT
  • Created Date: Jul 2 1976 12:00AM