Full-Scale Test of Continuity Diaphragms in Skewed Concrete Bridge Girders

Continuity diaphragms used in prestressed girder bridges on skewed bents have caused difficulties in detailing and construction. The results of the field verification for the effectiveness of continuity diaphragms for skewed, continuous, and prestressed concrete girder bridges are presented. The current design concept and bridge parameters that were considered include skew angle and the ratio of beam spacing to span (aspect ratio). A prestressed concrete bridge with continuity diaphragms and a skewed angle of 48° was selected for full-scale test by a team of engineers from Louisiana Department of Transportation and Development and the Federal Highway Administration. The live load tests performed with a comprehensive instrumentation plan provided a fundamental understanding of the load transfer mechanism through these diaphragms. The findings indicated that the effects of the continuity diaphragms were negligible and they can be eliminated. The superstructure of the bridge could be designed with link slab. Thus, the bridge deck would provide the continuity over the support, improve the riding quality, enhance the structural redundancy, and reduce the expansion joint installation and maintenance costs.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/32947845
• Authors:
  • Saber, Aziz
  • Alaywan, Walid
• Publication Date: 2011-1

Language

• English

Media Info

• Media Type: Print
• Features: Bibliography; Figures; Tables;
• Pagination: pp 21-28
• Serial:
  • Journal of Bridge Engineering
  • Volume: 16
  • Issue Number: 01
  • Publisher: American Society of Civil Engineers
  • ISSN: 1084-0702
  • Serial URL: http://ojps.aip.org/beo

Subject/Index Terms

• TRT Terms: Load tests; Prestressed concrete bridges; Prototype tests; Skew bridges
• Identifier Terms: Louisiana Department of Transportation and Development; U.S. Federal Highway Administration
• Uncontrolled Terms: Bridge girders; Continuity diaphragms; Link slab bridges; Skew angles
• Subject Areas: Bridges and other structures; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01328103
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 21 2011 1:03PM