STUDY OF A PRECAST-PRESTRESSED MODEL BRIDGE SLAB

A HALF-SCALE CONCRETE COMPOSITE MODEL BRIDGE SLAB WAS STUDIED TO EVALUATE THE STRUCTURAL PERFORMANCE OF A 36-FOOT LONG, TWO-LANE, HIGHWAY BRIDGE SPAN. THE PROPOSED COMPOSITE MEMBER IS COMPOSED OF A PRESTRESSED CONCRETE CHANNEL, AN INTERIOR VOID FORM, AND A TOP SLAB OF CAST-IN-PLACE CONCRETE. A THEORETICAL ANALYSIS OF THE LOAD DISTRIBUTION BEHAVIOR OF AN ORTHOTROPIC PLATE BASED ON THE GUYON- MASSONNET DISTRIBUTION THEORY IS PRESENTED. APPLICATION OF THE THEORY TO THIS PARTICULAR BRIDGE SYSTEM TOGETHER WITH A SAMPLE CALCULATION IS PRESENTED IN AN APPENDIX. AN 18-FOOT LONG, 12 FT. 6 IN. WIDE MODEL BRIDGE SPAN CONSISTING OF FIVE PRESTRESSED CHANNELS AND A CAST-IN-PLACE TOP SLAB WAS CONSTRUCTED FOR THE PURPOSE OF EXPERIMENTAL VERIFICATION OF THE ANALYTICAL ANALYSIS. TWO SERIES OF TESTS WERE CONDUCTED IN THIS STUDY. IN THE FIRST SERIES OF TESTS A SINGLE CONCENTRATED LOAD WAS APPLIED TO A GRID OF 30 LOAD POINTS. THE LOAD DISTRIBUTION BEHAVIOR WAS STUDIED IN TERMS OF THE DISTRIBUTION PATTERN OF THE MEASURED DEFLECTIONS. IN THE SECOND SERIES OF TESTS A SIMULATED S16 TRAILER LOAD WAS APPLIED TO THE TWO-LANE MODEL BRIDGE SLAB. THE WHEEL LOAD DISTRIBUTION, THE ULTIMATE BEHAVIOR OF THE SYSTEM, AND THE FAILURE MODE WERE INVESTIGATED. COMPLETE COMPOSITE ACTION COMPRESSION CRUSHING OF THE TOP SLAB IN THE VICINITY OF THE LOAD LINE. /AUTHOR/

• Record URL:
  https://spexternal.modot.mo.gov/sites/cm/CORDT/MCHRP68-14.pdf
• 
• Supplemental Notes:
  • Hpr-1/7/, 67-1
• Corporate Authors:

  University of Missouri, Columbia

  1205 University Avenue
  Columbia, MO  United States  65201

  Missouri State Highway Commission

  State Highway Building
  Jefferson City, MO  United States  65101

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Salmons, J R
  • Mokhtari, S
• Publication Date: 1968

Subject/Index Terms

• TRT Terms: Bridge superstructures; Cast in place structures; Composite construction; Deflection tests; Highway bridges; Load transfer; Orthotropic; Precast concrete; Prestressed concrete; Slabs; Structural analysis; Structural mechanics; Theory; Wheel loads
• Uncontrolled Terms: Bridge spans; Model tests; Structural behavior; Wheel load distribution
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00207902
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS, STATEDOT
• Created Date: May 19 1994 12:00AM