EXPERIENCE WITH DESIGN AND CONSTRUCTION OF SEGMENTAL POST-TENSIONED AERIAL STRUCTURES ON TWO RECENT WMATA METRO RAIL PROJECTS

This paper presents the development of design concepts with viable options and the final selection of adopted structural system based on the consideration of technical impact, overall economy, constructability, maintainability, speed of construction, aesthetic appearance, minimum construction activity particularly in wetland area which is environmentally sensitive. The paper will then discuss the evolution of design criteria, structural design parameters, allowable stresses for aerial structure, natural frequency and dynamics consideration, continuity effect, different load conditions and combinations, provisions and requirements for future bearing replacements of aerial structure segmental girder. Additionally, the paper contains a detailed erection procedure for two different sections adopted for the aerial structure describing the falsework, trusses, loading of precast segments, temporary post tensioning, etc. The lession learned from the previous WMATA aerial structure construction, i.e. J-H line and their impact on outer F-line design and construction are included.

  • Supplemental Notes:
    • Full Conference proceedings available only on CD.
  • Corporate Authors:

    American Public Transportation Association

    1201 New York Avenue, NW
    Washington, DC    20005
  • Authors:
    • RUDOLF, J
  • Conference:
  • Publication Date: 1998

Language

  • English

Media Info

  • Pagination: 22p

Subject/Index Terms

Filing Info

  • Accession Number: 00769755
  • Record Type: Publication
  • Report/Paper Numbers: Volume 1
  • Files: TRIS
  • Created Date: Sep 22 1999 12:00AM