INELASTIC SEISMIC TORSIONAL RESPONSE OF SIMPLE SYMMETRIC STRUCTURES

The inealastic seismic response of simiple single-story structures, symmetric in plan in the elastic domain but having lateral load resisting structural elements (LLRSE) of unequal yield strength, has been studied. When yeilding is initiated in such structures, an instantaneous state of torsional coupling in plan induces an additional torsional component to the response of the system. This torsional effect produces, under some circumstances, a magnification of the ductility demand of the LLRSE having lesser strength as compared to what would otherwise be expected of a single-degree-of-freedom. A parametric study investigated the circumstances where this amplification becomes significant, and the results of this research are presented. It is shown that the observations noted from this study are equally applicable to more elaborate structures. Implications for Canadian design practice are discussed.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03151468
• Corporate Authors:

  National Research Council of Canada

  Research Journals
  Ottawa, Ontario K1A 0R6,   Canada 
• Authors:
  • Bruneau, M
  • Mahin, S A
• Publication Date: 1992-2

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 11-25
• Serial:
  • Canadian Journal of Civil Engineering
  • Volume: 19
  • Issue Number: 1
  • Publisher: National Research Council of Canada
  • ISSN: 0315-1468
  • Serial URL: http://www.nrcresearchpress.com/loi/cjce

Subject/Index Terms

• TRT Terms: Building codes; Durability; Seismicity; Structural analysis; Structural mechanics; Torsion
• Uncontrolled Terms: Seismic response; Structural behavior
• Old TRIS Terms: Yield
• Subject Areas: Bridges and other structures; Highways; Law; I20: Design and Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00621915
• Record Type: Publication
• Files: TRIS
• Created Date: May 31 1992 12:00AM