Development of seismic hazard maps for the proposed 2005 edition of the National Building Code of Canada

• DOI: 10.1139/l02-070
• Publication Date: 2003-09-11T19:38:19Z
• Authors: John Adams; Gail Atkinson
• Keywords: Building code; Hazard map; Computation tree logic

A new seismic hazard model, the fourth national model for Canada, has been devised by Geological Survey of Canada to update Canada's current (1985) maps. The incorporates knowledge from recent earthquakes (both Canadian and foreign), strong ground motion relations describe how shaking varies with magnitude distance, newly recognized Cascadia subduction earthquakes, a more systematic approach reference site conditions. Other innovations are computation at 2% in 50 year probability level, use median motions, presentation results as uniform spectra, explicit incorporation uncertainty via logic-tree approach. These provide reliable basis characterizing across have approved National Committee on Earthquake Engineering (CANCEE) loads proposed 2005 edition Building Code Canada.Key words: hazard, earthquake, probability, spectrum, maps, subduction, uncertainty, CANCEE, Canada.