Dynamic sensors for in-situ structural system identification and seismic microzonation

这项提议涉及购置6个便携式地震传感器，以支持麦吉尔大学、蒙特利尔理工学院和新玩法大学的地震工程研究活动。传感器及其数据采集系统是一体化工作站，可以部署在单个站点或小型同步阵列中。 为了预测建筑物在地震作用下的动力响应，利用环境振动测量（AVM）提取建筑物的基本动力特性（固有频率、振型和阻尼效应）。土壤场地的AVM用于评估场地的基本频率和这些地点建筑物地震反应中预期的全球放大效应。这些现场测量用于编制一个地区（本提案中为魁北克省）的地震小区划图。便携式传感器还将用于理工学院的结构实验室，以补充其敏感仪器（待采购），以便在测试大型和/或非常灵活的试样时进行多点精确测量。这还包括对柔性结构子组件、建筑构件和柔性或柔性连接的建筑操作构件进行振动台测试。所有这些工作都是在加拿大地震研究网络（2008-2013年）的框架下进行的。UNB和麦吉尔还就木材/混合重型系统的现场鉴定进行了合作。这项工作是2009年9月为NSERC创新木制品和建筑系统战略网络（NEWBuildS）（2010-2015）提出的研究计划的一部分，目前正在审查中。拟用该设备进行的研究发现，在改进加拿大国家建筑规范中针对所有建筑类型的抗震规定方面，特别是针对目前未涵盖的木/混合建筑，具有关键应用。地震小区划绘图方面的进展也将导致改进建筑物及其建筑和功能组成部分的脆弱性和风险评估方法。

This proposal relates to the acquisition of six portable seismic sensors to support earthquake engineering research activities at McGill University, École Polytechnique de Montréal and University of New Brunswick. The sensors and their data acquisition system are all-in-one stations that can be deployed at single sites or in small synchronized arrays. Ambient vibration measurements (AVM) in existing buildings are used to extract their essential dynamic characteristics (natural frequencies, mode shapes, and damping effects), in view of predicting their dynamic response to earthquake. AVM at soil sites is used to evaluate the fundamental frequency of the site and the global amplification effects anticipated in the earthquake response of buildings at these locations. These site measurements are used in the preparation of seismic microzonation maps of a territory (the province of Québec in this proposal). The portable sensors will also be used in the Structures Laboratory at École Polytechnique to supplement their sensitive instruments (to be acquired) for multi-point accurate measurements when large and or very flexible specimens are tested. This also includes shake table testing of flexible structural sub-assemblies, architectural components and flexible or flexibly-connected building operational components. All this work is carried out under the umbrella of the Canadian Seismic Research Network (CSRN) (2008-2013). UNB and McGill have also engaged in collaboration on the in situ identification of wood/hybrid heavy systems. This work is part of the research program elaborated in the September 2009 proposal for the NSERC Strategic Network on Innovative Wood Products and Building Systems (NEWBuildS) (2010-2015), currently under review. The proposed research to be carried out with this equipment finds critical applications in the improvement of the seismic provisions of the National Building Code of Canada for all building types, and in particular for wood/hybrid buildings that are not covered at present. Advances in seismic microzonation mapping will also lead to improved vulnerability and risk assessment methods for buildings and their architectural and functional components.