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.

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• Record URL:
  https://rosap.ntl.bts.gov/view/dot/20116
• 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