AN EVALUATION OF THE EFFECTS OF TRAVELING SEISMIC WAVES ON THE THREE-DIMENSIONAL RESPONSE OF STRUCTURES

Although usually not considered in design applications, the spatial variations of incident seismic wave motions may, under certain conditions, have a profound influence on the response of structures. To investigate these effects, a new methodology has been developed for analyzing the fully three-dimensional dynamic response of structures that: (1) are above the ground, elastic, and have an arbitrary configuration; (2) are supported on any number of rigid foundations of arbitrary shape that rest on the surface of an elastic half-space; and (3) are subjected to input motions from body or surface waves with arbitrary excitation frequencies and angles of incidence. The superstructure is represented using a finite element model; foundation/soil interaction effects are analyzed using a continuum method. This report describes the general methodology and presents an example of its application to the analysis of a simple single-span bridge/soil system subjected to incident SH-waves. The analysis results clearly demonstrate the importance of traveling wave effects and the influence of different angles of incidence on the three-dimensional bridge response characteristics.

  • Corporate Authors:

    Agbabian Associates

    250 North Nash Street
    El Segundo, CA  USA  90245

    National Science Foundation

    Applied Science and Research Applications, 1800 G Street, NW
    Washington, DC  USA  20550
  • Authors:
    • Werner, S D
    • Lee, L C
    • WONG, H L
    • Trifunac, M D
  • Publication Date: 1977-10

Media Info

  • Pagination: 161 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00175121
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: AA-R-7720-4514, NSF/RA-770310
  • Contract Numbers: NSF-ENV75-02473
  • Files: TRIS
  • Created Date: Apr 26 1978 12:00AM