A PROPOSED DYNAMIC FOUNDATION FACTOR FOR THE NATIONAL BUILDING CODE OF CANADA

Results of a parametric study on site response effects due to seismic strong ground motions are used in this paper to develop a new 'dynamic foundation factor' for the National Building Code of Canada. In order to capture the effect of the site resonance, the proposed dynamic foundation Factor, F*, is given as a function of the ratio between the fundamental period of the building and the site period. The parametric study results suggested that the proposed F* spectra be dependent on 4 different classes of soil deposits: deep cohesive (1), deep cohesionless (2), shallow cohesive and cohesionless (3), and dense sand (4). For classes 1 and 2, the F* spectra are independent of the ratio of peak acceleration to peak velocity a/v, of the seismic ground motion. For classes 3 and 4, however, the F* spectra are an increasing function of the ratio a/v. A scaling multiplier is introduced to take into account the influence of level of intensity, v. The proposed dynamic foundation factor is compared with the National Building Code of Canada 1990 foundation factor. The actual sites are used to check the validity and consistency of the proposed dynamic foundation factor.

• 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:
  • Elhmadi, K
  • Heidebrecht, A C
• Publication Date: 1991-12

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 974-984
• Serial:
  • Canadian Journal of Civil Engineering
  • Volume: 18
  • Issue Number: 6
  • Publisher: National Research Council of Canada
  • ISSN: 0315-1468
  • Serial URL: http://www.nrcresearchpress.com/loi/cjce

Subject/Index Terms

• TRT Terms: Building codes; Cohesive soils; Earthquake resistant design; Earthquake resistant structures; Foundations; Shear strength
• Geographic Terms: Canada
• Subject Areas: Bridges and other structures; Highways; Law; I20: Design and Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00620805
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 31 1992 12:00AM