PRESTRESSED WAFFLE SLAB BRIDGES

Design engineers intuitively regard the two-way structural system of a waffle slab to be incompatible with the one-way load-transferring action of a bridge. However, in relatively wide bridges on isolated supports, and in skew bridges, large twisting and transverse moments are present. In this paper it is shown that a waffle slab bridge through its geometry of cross section can provide efficiently the required resistance moments in two orthogonal directions. Results from a feasibility study indicate that a waffle slab bridge (a) has the potential of being a more economical alternative to solid-slab and slab-on-girder bridges; and (b) provides excellent access to prestressing cables for both inspection and maintenance purposes. Tools for design and analysis of waffle slab bridges for both serviceability and ultimate limit states are presented.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1987/1118/1118-005.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=PRESTRESSED+WAFFLE+SLAB+BRIDGES&author=J.+Kennedy&publication_year=1987
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on General Structures. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Kennedy, John B
• Conference:
  • 66th Annual Meeting of the Transportation Board
  • Location: Washington District of Columbia, United States
  • Date: 1987-1-12 to 1987-1-15
• Publication Date: 1987

Media Info

• Media Type: Print
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 29-38
• Monograph Title: Bridge needs, design, and performance
• Serial:
  • Transportation Research Record
  • Issue Number: 1118
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Access; Bridges; Economics; Inspection; Maintenance
• Uncontrolled Terms: Bridge inspection; Bridge maintenance; Prestressing cables
• Old TRIS Terms: Waffle slab bridges
• Subject Areas: Bridges and other structures; Design; Economics; Highways; Maintenance and Preservation; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00468601
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: May 31 1988 12:00AM