BEHAVIOR OF SKEW HIGHWAY BRIDGES

THE RESULTS ARE PRESENTED OF AN ANALYTICAL INVESTIGATION INTO THE BEHAVIOR OF SKEWED SLAB AND STRINGER TYPE BRIDGES. SIMPLE AND TWO-SPAN CONTINUOUS BRIDGES WERE TREATED. SEVERAL ANALYTICAL APPROACHES WERE REVIEWED AND EVALUATED, BUT THE ANISOTROPIC PLATE METHOD WITH A FINITE ELEMENT SLAB SUBDIVISION WAS THE MAIN ANALYTICAL TOOL IN THIS REPORT. VARIABLES CONSIDERED WERE POSITION AND TYPE OF LOADING, ANGLE OF SKEW, AND GIRDER TO DIAPHRAGM STIFFNESS RATIO. A STUDY OF THE LOCAL BEHAVIOR OF SKEW-SUPPORTED DECK SLABS WAS ALSO CARRIED OUT. SOME CONCLUSIONS FROM THIS WORK WERE: (1) ALTHOUGH THIS PLATE THEORY PREDICTS NEGATIVE MOMENTS AT DISCONTINUOUS OBTUSE CORNERS, THESE MOMENTS ARE VERY LOCAL AND ARE ELIMINATED BY VERY SLIGHT CRACKING OF THE CONCRETE, (2) FOR RHOMBOIDAL SHAPED SKEW SLABS, THE LARGEST POSITIVE AND NEGATIVE MOMENTS ACT ESSENTIALLY PARALLEL TO LINES JOINING THE OBTUSE CORNERS, AND (3) FOR SKEW SLABS WHICH ARE VERY LONG, ONE-WAY SLAB BEHAVIOR OCCURS FOR LOADS APPLIED AWAY FROM THE ENDS. /BPR/

• Supplemental Notes:
  • Hpr, D-4-53
• Corporate Authors:

  University of California, Berkeley

  Berkeley, CA  United States  94720

  California Division of Highways

  Bridge Department
  Sacramento, CA  United States  05914

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Powell, G H
  • BOUWKAMP, J G
  • Buckle, I G
• Publication Date: 1969-2

Subject/Index Terms

• TRT Terms: Anisotropy (Physics); Continuous structures; Finite element method; Highway bridges; Skew bridges; Slabs; Stiffness; Stringers; Structural plates; Theory
• Uncontrolled Terms: Plates
• Old TRIS Terms: Anisotropy; Continuous skewed slab bridges; Finite elements; Simple span
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00207933
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Feb 9 1970 12:00AM