LILAC ROAD OVERCROSSING STUDY

LILAC ROAD OBERCROSSING, A 695' LONG CONCRETE ARCH BRIDGE, WITH BOX-SHAPED RIBS AND SUPERSTRUCTURE, WAS DESIGNED USING SEVERAL CROSS-SECTIONAL CONFIGURATIONS OF VARIABLE DEPTHS. ONE OF THE BOX SECTIONS EMPLOYED CONSISTED OF TOP AND BOTTOM SLABS WITH A MIDDLE, OR STIFFENER SLAB WHICH TRAVERSES BETWEEN THE THREE GIRDERS. THIS SECTION, OF VARIABLE DEPTH, WILL BE USED NEAR THE CENTER OF THE BRIDGE. THE DESIGNER REQUESTED ANALYSIS TO DETERMINE THE DISTRIBUTION OF FORCES INTO THE MIDDLE SLAB UNDER DEAD, LIVE, AND AXIAL LOADING CONDITIONS. HIS DESIRE WAS TO ASSESS THE BEHAVIOR OF THE SLAB FOR DESIGN PURPOSES. FOR EXPEDIENCY AND SIMPLICITY OF ANALYSIS, A SIMPLY SUPPORTED, 100' SPAN WITH DIAPHRAGMS AT 25' INTERVALS WAS ASSUMED. AXIAL LOADS WERE APPLIED AT BOTH ENDS WITH THE INTENT OF REPRESENTING THE ARCH ACTION. A PROGRAM CALLED MUPDI, WHICH IS BASED ON A DIRECT STIFFNESS APPLICATION OF THE GOLDBERG-LEVE EQUATIONS FOR FOLDED PLATES, WAS USED FOR THE DEAD AND LIVE LOADING CONDITIONS. A PROGRAM CALLED FINPLA, WHICH IS BASED ON THE FINITE ELEMENT METHOD IN CONJUNCTION WITH THE DIRECT STIFFNESS METHOD, WAS UTILIZED TO PRODUCE AXIAL LOADING SOLUTIONS. /FHWA/

  • Supplemental Notes:
    • Contract D-4-53
  • Corporate Authors:

    California Department of Public Works

    1120 N Street
    Sacramento, CA  USA  95814
  • Authors:
    • Wallace, M R
  • Publication Date: 1973-3

Media Info

  • Pagination: 42 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00208110
  • Record Type: Publication
  • Source Agency: California Department of Public Works
  • Report/Paper Numbers: Interim
  • Files: TRIS
  • Created Date: Jun 19 1974 12:00AM