Engineering applications of new probabilistic seismic ground-motion maps of Canada

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TypeArticle
Journal titleCanadian Journal of Civil Engineering
ISSN0315-1468
Volume10
Issue4
Pages670680; # of pages: 11
SubjectEarthquakes; seismic design code; zoning; maps; building codes; reference seismic ground motion; seismic base shear calculation; design provisions recommendations
AbstractNew peak horizontal acceleration and velocity zoning maps with a probability of exceedance of 10% in 50 years and seven seismic zones are developed from new probabilistic strong seismic ground-motion estimates for replacement of the 1970 seismic zoning map in the National Building Code of Canada. The adoption of a probability of exceedance of 10% in 50 years produces reference seismic ground motion appropriate to the level of protection afforded by provisions of the current code; the use of two ground-motion parameters, the relative levels of which vary considerably throughout the country, provides independent reference levels for structures having short and long fundamental periods. For calculating seismic base shear, a new seismic response factor is derived in which seismic forces for long- period structures are directly proportional to zonal velocities, and for short-period structures proportional to zonal accelerations, with an upper limit on the acceleration/ velocity ratio applicable for any location. These and associated changes in seismic design provisions have been recommended for adoption in the 1985 edition of the National Building Code of Canada.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-1135
NRC number22665
4532
NPARC number20358452
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Record identifier2828f3c9-5baa-4945-95cd-92512437f1fe
Record created2012-07-20
Record modified2016-05-09
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