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，使它们处于地震危险的危险之中。2010年6月23日，位于渥太华市东北约50公里处的5.0级地震突出了潜在的风险。这场地震在渥太华地区有强烈的感觉，这些地区位于冰川后的软沉积物上，这放大了地震震动的程度。土壤放大作用可以显著影响地震事件的地面运动和危害;并且，最新版本的加拿大国家建筑规范（2005年）认识到其重要性，并通过地震场地分类系统确定土壤放大系数。 过去的试点研究结果表明，地震土壤放大系数由加拿大国家建筑规范，这主要是基于加州的数据库，是不适合加拿大东部，由于独特的地质和岩土工程条件的冰后期沉积物在该地区。渥太华地区的地震记录表明，土壤放大相对于岩土工程实践中使用的典型放大系数较大。 拟议的跨学科研究将提供一个独特的区域特定模型的地震土壤放大在加拿大东部不同的网站类。这项研究将与加拿大地震研究网的补充工作联系起来。CSRN强调，制定特定地区的地震土壤放大系数是降低加拿大城市地震风险的一个重要因素。 拟议的研究结果将导致更好地了解土壤放大行为强烈的地震运动，长期计划是提供特定区域的地震土壤放大系数为加拿大东部，这将是有影响力的指导改进未来版本的加拿大国家建筑规范和特定地点的研究。

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.