Soil and Foundation Improvement Solutions for Seismic Resistant Design

抗震设计的土壤和地基改良解决方案

• 批准号: RGPIN-2018-05338
• 负责人: TofighRayhani, Mohammad
• 金额: $ 2.26万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=684075
• 关键词: Soil; Foundation; Improvement; Solutions; Seismic

The upgraded seismic loading included in the revised national building code (NBCC 2005) postulates an increased seismic hazard in Canada. Most existing structures, including major infrastructure (e.g. nuclear power plants, bridges, etc.), were designed and constructed prior to these new design guidelines and are still susceptible to earthquake damage. In addition, failures of buildings during recent earthquakes due to excessive settlement and/or rotation of foundations have highlighted the importance of designing foundations that can withstand the seismic forces acting on the supported structure. Therefore, there is a need to accurately characterize the seismic risk for critical infrastructure systems and to provide innovative solutions for seismic resistant foundations for new and existing structures. ******The research program proposed here aims at developing innovative techniques for enhancing the lateral load capacity of existing foundations and developing new techniques for constructing earthquake-resistant foundation systems. The specific objectives of this research are: a) to evaluate the seismic site response and soil-structure interaction (SSI) effects on foundation input motion in soft soils; b) explore efficient foundation systems suitable for resisting seismic loads, and c) develop innovative retrofitting techniques for foundations of existing structures. Both experimental and numerical analyses will be employed to conduct this research. Shaking table tests will be conducted to study seismic site response and soil-structure interaction, as well as dynamic response of Fiber Reinforced Polymer piles. Pile load tests will also be used to examine the axial and lateral capacity of different reinforced pile foundation systems for existing and new infrastructure systems. ******The research is anticipated to provide soil and foundation improvement solutions for seismic resistant design and produce design guidelines for retrofitting of existing inadequate foundations. Many infrastructure projects, petrochemical plants, bridges, and renewable energy projects will benefit from the findings of this study. The improved seismic safety and reduced seismic risk in our infrastructure will provide significant social and economic benefits to our community. This research is also expected to benefit the Canadian public and protect the environment as a result of safer and resistant designs.

修订后的国家建筑法规（NBCC 2005）中包含的升级的地震负荷假设加拿大的地震危险增加了。在这些新的设计指南之前设计和建造了大多数现有的结构，包括主要的基础设施（例如核电站，桥梁等），并且仍然容易受到地震损害的影响。 此外，由于过度定居和/或基金会旋转导致最近地震期间建筑物的故障突出了设计基础的重要性，这些基础可以承受在受支持结构上作用的地震力。因此，有必要准确地表征关键基础设施系统的地震风险，并为新结构和现有结构的地震基础提供创新的解决方案。 ********提出的研究计划旨在开发创新技术，以增强现有基础的横向负载能力，并开发用于构建抗震基础系统的新技术。这项研究的具体目标是：a）评估对软土中基础输入运动的地震位点响应和土壤结构相互作用（SSI）的影响； b）探索适合抵抗地震载荷的有效基础系统，c）为现有结构的基础开发创新的改造技术。实验和数值分析都将用于进行这项研究。将进行摇桌测试，以研究地震位点反应和土壤结构相互作用，以及纤维增强聚合物桩的动态反应。桩负荷测试还将用于检查现有和新基础设施系统的不同增强桩基础系统的轴向和横向容量。 *****预计该研究将为地震抗性设计提供土壤和基础改进解决方案，并制定设计指南，以改造现有的基础不足。许多基础设施项目，石化植物，桥梁和可再生能源项目将从本研究的发现中受益。在我们的基础设施中改善的地震安全和地震风险降低将为我们的社区带来重大的社会和经济利益。预计这项研究将使加拿大公众受益，并通过更安全和抵抗力的设计来保护环境。