Development of regional site amplification models for eastern canada

蒙特利尔和渥太华位于活跃的西魁北克地震带，这使它们面临地震危险。2010年6月23日，渥太华市东北约50公里处发生了里氏5.0级地震。这次地震在渥太华的一些地区有强烈的震感，这些地区位于软的冰川后沉积物上，这加剧了地震的震动程度。土壤放大对地震动和地震事件的危险性有显著影响；而且，最新版本的加拿大国家建筑规范（2005年）认识到它在地震场地分类系统中确定土壤放大系数的重要性。

The location of Montreal and Ottawa in the active Western Quebec seismic zone places them at risk of seismic hazards. The potential risk was recently highlighted with the magnitude M5.0 earthquake on June 23, 2010, located about 50 km northeast of the city of Ottawa. This earthquake was felt strongly in areas of Ottawa that are located on soft postglacial sediments, which amplified the level of earthquake shaking. Soil amplification can significantly influence the ground motions and hazards of seismic events; and, the most recent version of the National Building Code of Canada (2005) recognizes its importance with a seismic site classification system to determine soil amplification factors. The results of past pilot research indicate that the seismic soil amplification factors given by the National Building Code of Canada, which are mainly based on the Californian database, are not adequate for Eastern Canada, due to the unique geological and geotechnical conditions of postglacial sediments in the region. Earthquake recordings in the Ottawa region show that the soil amplification is large relative to the typical amplification factors being used in geotechnical practice. The proposed interdisciplinary research will provide a unique region-specific model of seismic soil amplification for different site classes in Eastern Canada. The research will be linked with complementary efforts by the Canadian Seismic Research Network (CSRN). CSRN has emphasized that the development of region-specific seismic soil amplification factors is an important element for the reduction of urban seismic risk in Canada. Results of the proposed research will lead to an improved understanding of soil amplification behaviour to strong seismic motions; and, the long-term plan is the provision of region-specific seismic soil amplification factors for Eastern Canada, which will be influential in guiding improvements for future versions of the National Building Code of Canada and for site-specific studies.