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.
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- Sponsored by Texas State Dept of Highways P Public Transportation in Cooperation with FHWA.
University of Texas, AustinCenter for Highway Research, 200 West 21st Street
Austin, TX United States 78712
Washington, DC United States 20590
Texas State Department of Highways & Public TranspDivision of Planning and Research, P.O. Box 5051
Austin, TX United States 78763
- Furlong, R W
- Mirza, S A
- Publication Date: 1974-8
- Pagination: 89 p.
- TRT Terms: Beams; Girders; Grade separations; Load tests; Prestressed concrete; Prestressing; Reinforcement (Engineering); Stresses
- Old TRIS Terms: Caps /structural/
- Subject Areas: Bridges and other structures; Highways;
- 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