Methods for predicting the large plastic deformations of the roof structures of intercity buses during rollover accidents have been investigated. A procedure has been developed and used to investigate the integrity of GMC 4905 bus. The results of the investigation and the procedures developed, which are described in this report, are applicable to other buses. The investigation included surveys of bus accident reports, bus structural investigations conducted by others, and analytical procedures suitable for the analysis of large plastic deformations under dynamic loading conditions. On the basis of the survey, the general-purpose finite-element computer code, ANSYS, was selected for the analysis of the GMC bus, and the structure was modeled as a collection of hinges, beams, and membranes. The analysis was supplemented by static tests on bus components to provide computer input information as well as experimental verification of the modeling techniques and computer code operation. As an aid to future structural investigations of other buses, recommendations are given for procedures to be followed. The report is contained in three volumes. Volume I is the Executive Summary and lists the highlights of the project. Volume II contains the detailed report of the work performed. Volume III is the Supplement Volume consisting primarily of internal APL/JHU engineering memoranda with detailed information considered too voluminous to include in the previous volumes. A sample output from the computer program is also included in Volume III. /FHWA/

  • Supplemental Notes:
    • Contract funding by Bureau of Motor Carrier Safety.
  • Corporate Authors:

    Johns Hopkins University, Laurel

    Applied Physics Laboratory, 11100 Johns Hopkins Road
    Laurel, MD  United States  20723-6099

    Federal Highway Administration

    Structure and Applied Mechanics Division, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • O'Conner, J S
    • Caywood, W C
    • Rivello, R M
    • Bohn, P F
    • Kime, J R
  • Publication Date: 1978-10

Media Info

  • Pagination: 32 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00302202
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-RD-79- 55 Final Rpt., FCP 30B0-052
  • Contract Numbers: P.O. 6-3-0182
  • Files: TRIS, USDOT
  • Created Date: Dec 19 1979 12:00AM