Field Instrumentation and Measured Response of the I-295 Cable-Stayed Bridge : Interim Report on Construction Measurements in Deck Segments

During the construction of the 1-295 cable-stayed bridge, an extensive array of mechanical strain gage points were installed in sections of the box girders, pylons, and piers. At each instrumented box girder section, five longitudinal gages were placed on the deck surface and three longitudinal gages were placed on the bottom flanges of the box girder. Instrumentation was concentrated on the cantilevered north span and the two adjacent side spans. Strain measurements were taken throughout the erection of the cantilever span. Measured strains are reported on in this study. The measurements revealed a complex strain pattern across the deck, reflecting the existence of shea lag in the box girder, but also the influence of multiple post-tensioning tendons across the deck.

Record URL:
Corporate Authors:
Virginia Transportation Research Council

530 Edgemont Road
Charlottesville, VA United States 22903

Virginia Department of Transportation

1401 East Broad Street
Richmond, VA United States 23219

Federal Highway Administration

1200 New Jersey Avenue, SE
Washington, DC United States 20590
Authors:
- Baber, T T
- Barton, F W
- McKeel, W T
Publication Date: 1991-1

Language

English

Media Info

Media Type: Web
Edition: Interim Report
Features: Figures;
Pagination: 38p

Subject/Index Terms

TRT Terms: Box girders; Bridge construction; Bridge decks; Cable stayed bridges; Cantilever bridges; Field studies; Instrumentation; Piers (Supports); Posttensioning; Prestressed concrete bridges; Pylons; Segmental construction; Strain measurement; Tendons
Subject Areas: Bridges and other structures; Construction; Highways; I24: Design of Bridges and Retaining Walls; I53: Construction of Bridges and Retaining Walls;

Filing Info

Accession Number: 01342754
Record Type: Publication
Report/Paper Numbers: VTRC 91-IR2
Files: NTL, TRIS, USDOT, STATEDOT
Created Date: Jun 6 2011 11:48AM