Integrating soil-structure interaction within seismic design and assesement of buildings in Canada

虽然一些国际建筑规范和设计指南包含了考虑土壤-基础-结构相互作用（SFSI）的规定，但它们并没有将上部结构、基础和周围土壤的设计作为一个综合的工程系统来处理。了解和量化建筑结构的整体地震反应是必不可少的，以制定设计程序，考虑综合结构行为。在基于能力或基于性能的抗震设计框架内应用这些程序，需要为新建筑物和抗震能力不足的旧建筑物提出替代的具有成本效益的解决方案。拟议的研究计划的长期目标是开发综合设计程序的抗震设计和评估浅基础上的建筑物，将考虑土壤基础结构系统的所有组件的综合贡献。这些程序将解决加拿大西部和东部的地震活动背景，特别注意高频地震运动的结构响应的特殊性。该研究将围绕两个主题进行：（一）评估土壤-结构相互作用对根据加拿大现行抗震规定设计的建筑物抗震性能的影响;（二）制定包括建筑物-地基-土壤系统综合反应的设计程序。将研究钢筋混凝土剪力墙和钢支撑框架。这些系统在加拿大通常用于抵抗地震荷载，并且由于其高刚度，基础/土壤变形可以显著地有助于整个系统的灵活性。将通过广泛的分析研究来检查地震激励的整体结构响应。非线性时程分析的综合结构模型将在开源计算平台OpenSees中建立。将在基于能力和基于业绩的方法的范围内提出设计程序，并注意其是否适合实际使用。这项研究的结果将有助于更好地了解综合建筑系统的全球抗震性能，有助于引入新的设计方法到加拿大的抗震设计规定，并提供指导方针和工具，实践工程师在日常实践中集成SFSI的影响。他们将讨论加拿大东部的地震背景，目前可获得的数据量有限。所提出的程序的经济影响可能是显着的，特别是对于较旧的抗震缺陷的建筑物，应用开发的数值工具和综合方法来分析其抗震性能，可以避免不必要的和昂贵的改造。

Although several international building codes and design guidelines contain provisions to account for soil-foundation-structure interaction (SFSI), they do not address the design of the superstructure, the foundation and the surrounding soil as an integrated engineering system. Understanding and quantifying the global seismic response of building structures is essential to develop design procedures that consider the integrated structural behaviour. Such procedures, applied either within the framework of capacity-based or performance-based seismic design, are needed to put forward alternative cost-effective solutions for new buildings and for seismically deficient older buildings.******The long-term objective of the proposed research program is to develop integrated design procedures for the seismic design and evaluation of buildings on shallow foundations that will consider the combined contributions of all components of the soil-foundation-structure system. These procedures will address the seismicity context of western and eastern Canada with special attention paid to the particularities of the structural response to high-frequency seismic motions. The research will be structured around two main themes: (i) the assessment of the effects of soil-structure interaction on the seismic performance of buildings designed according to current Canadian seismic provisions; and (ii) the development of design procedures that include the integrated response of building-foundation-soil systems. Reinforced concrete shear walls and steel braced frames will be studied. These systems are commonly used in Canada to resist seismic loads and, because of their high stiffness, the foundation/soil deformations can contribute significantly to the overall system flexibility. The global structural response to seismic excitations will be examined through extensive analytical studies. The integrated structural models for nonlinear time history analysis will be built in the open-source computational platform OpenSees. Design procedures will be proposed in the context of capacity-based and performance-based methodologies with attention directed to their suitability for practical use.******The findings of this study will help to better understand the global seismic behaviour of integrated building systems, contribute to introduce new design methods into Canadian seismic design provisions and provide guidelines and tools for practicing engineers to integrate SFSI effects in everyday practice. They will address seismic context of Eastern Canada for which a limited amount of data is presently available. The economical impact of proposed procedures may be significant particularly for the older seismically deficient buildings, for which the application of developed numerical tools and integrated approach to analyse their seismic performance can avoid unnecessary and costly retrofits.