EFFECTS OF SHORING COMPOSITE U-BEAM MEMBERS

AN ANALYTICAL STUDY OF A BRIDGE SUPERSTRUCTURE COMPOSED OF PRESTRESSED-PRECAST COMPOSITE U-BEAM MEMBERS WITH TEMPORARY MID-SPAN SHORES IS PRESENTED IN THIS REPORT. THE COMPOSITE U-BEAM BRIDGE SUPERSTRUCTURE HAS INDICATED ECONOMY OF CONSTRUCTION IN PREVIOUS REPORTS. HOWEVER, IN MANY CASES DEFLECTION RATHER THAN STRENGTH LIMITATIONS CONTROL THE DESIGN OF U-BEAM MEMBERS. THE CONTROL OF DESIGN BY DEFLECTION LIMITS TO ASSURE SERVICEABILITY OF THE STRUCTURE. THIS WORK CONSIDERS ANALYTICAL PREDICTION OF A POINT SHORED U-BEAM SUPERSTRUCTURE WITH RESPECT TO: (A) THE INTERNAL STRESSES AND STRESS DISTRIBUTION OF MID-SPAN UNDER THE SHORE; (B) THE CREEP AND SHRINKAGE RESTRAINT MOMENTS, AS WELL AS THE RESTRAINT MOMENTS DUE TO THE SHORE, OVER THE INTERIOR PIERS; (C) THE ULTIMATE MID-SPAN DEFLECTION. THESE PREDICTIONS ARE, WHENEVER POSSIBLE, BASED ON PREVIOUSLY REPORTED RESEARCH AS IT PERTAINS TO THE CASE UNDER CONSIDERATION. THIS EXISTING WORK IS CONNECTED AND MODIFIED WHERE APPROPRIATE TO DEVELOP A COMPREHENSIVE PROCEDURE. TO AID IN FUTURE UTILIZATION OF A MID-SPAN SHORED CONSTRUCTION OF THE COMPOSITE U-BEAM, DESIGN RECOMMENDATIONS ARE PRESENTED.

• Record URL:
  • https://spexternal.modot.mo.gov/sites/cm/CORDT/MCHRP72-1.pdf
• 
• Supplemental Notes:
  • Rept No 72-1
• Corporate Authors:

  University of Missouri, Columbia

  1205 University Avenue
  Columbia, MO  United States  65201
• Authors:
  • Salmons, J R
  • Koshida, A
• Publication Date: 1972-6

Subject/Index Terms

• TRT Terms: Beams; Bridge superstructures; Bridges; Composite materials; Creep; Prestressing; Shoring; Stresses
• Uncontrolled Terms: Composite beams; U beams
• Old TRIS Terms: Prestressed beams
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00208121
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Files: TRIS, USDOT
• Created Date: Apr 20 1974 12:00AM