AN ULTIMATE LOAD TEST TO STUDY BRACING EFFECTS OF BRIDGE DECKS. INTERIM REPORT
The objective of this research project was to study the possible bracing effect of a bridge deck on the lateral instability of the stringers. The capacity of bridges is frequently underrated due to conservative assumptions regarding unknown conditions. Traditionally, the stringers have been taken to be laterally unsupported along the span, thus leading to conservative estimates of the bridge capacity. A full-size laboratory test was conducted on a 24-foot-span multi-girder bridge comprising five steel stringers supporting a wood deck, to demonstrate the bracing effect of the deck. It was seen that the bridge failed by lateral buckling of the bridge beams. The test bridge capacity was twice the unbraced capacity (assuming no bracing from the deck).
- Research study title: Bracing Effects of Bridge Decks.
University of Texas, AustinCenter for Transportation Research, 3208 Red River Street
Austin, TX United States 78705
Austin, TX United States 78763
Washington, DC United States 20590
- Vegesna, S
- Yura, J A
- Publication Date: 1992-5
- Features: Appendices; Figures; Photos; References; Tables;
- Pagination: 70 p.
- TRT Terms: Breaking loads; Bridge decks; Bridges; Buckling; Failure analysis; Girder bridges; Highway capacity; Laboratory tests; Load tests; Stringers
- Uncontrolled Terms: Bridge capacity; Full scale; Lateral stability
- Old TRIS Terms: Bracing effect; Multi-girder bridges
- Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;
- Accession Number: 00626971
- Record Type: Publication
- Report/Paper Numbers: FHWA/TX-92+1239-2, Res Rept 1239-2, CTR 3-5-90/1-1239-2
- Contract Numbers: Study 3-5-90/1-1239
- Files: TRIS, USDOT, STATEDOT
- Created Date: Mar 1 1996 12:00AM