Field Evaluation of Cross-Frame and Girder Live-Load Response in Skewed Steel I-Girder Bridges

A better understanding of the relationships among girder stresses, cross-frame design, and skew angle of two steel I-girder bridges, which have moderate and high levels of skew and differing cross-frame designs, was revealed via field testing under various load passes of a weighed load vehicle. Strains were measured at approximately 100 points on the two structures, and the majority of the instrumentation was located on the cross-frames. The data were analyzed in terms of vertical bending, lateral bending, and warping in the girders, and in the magnitudes and distribution of stresses in the cross-frames of the two structures. These metrics were compared between the two bridges and in relation to the assumptions typically used in contemporary bridge analysis. This comparison revealed the following: the magnitudes of lateral stresses were higher than current design guidance suggests in some cases when staggered cross-frames were used; significant magnitudes of warping stresses in the girder webs, which state-of-the-art analysis methods generally fail to consider; and cross-frame stresses that exceeded the values typically considered in design.

• Record URL:
  https://doi.org/10.1061/(ASCE)BE.1943-5592.0000846
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/32947845
• Supplemental Notes:
  • © 2015 American Society of Civil Engineers.
• Authors:
  • McConnell, Jennifer Righman
  • Radovic, Matija
  • Ambrose, Kelly
• Publication Date: 2016-3

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 04015062
• Serial:
  • Journal of Bridge Engineering
  • Volume: 21
  • Issue Number: 3
  • Publisher: American Society of Civil Engineers
  • ISSN: 1084-0702
  • Serial URL: http://ojps.aip.org/beo

Subject/Index Terms

• TRT Terms: Bending; Bridge design; Bridge members; Girder bridges; Skew bridges; Steel bridges; Traffic loads; Warpage
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01587521
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Jan 27 2016 5:10PM