Design of sustainable and resilient geotechnical infrastructure for transportation systems

交通系统可持续和弹性岩土基础设施的设计

• 批准号: RGPIN-2020-04761
• 负责人: ElNaggar, Hesham
• 金额: $ 6.41万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749043
• 关键词: Design; sustainable; resilient; geotechnical; infrastructure

Recent earthquakes have witnessed severe damage to bridges and buried structures due to ground motion, soil liquefaction and associated lateral spreading. The new 2020 National Building Code of Canada stipulates substantially increased seismic hazard across most major Canadian cities. In particular, British Columbia and the Quebec City-Montreal-Ottawa corridor are seismically active. Thus, the sustainability and resilience of the built environment have become increasingly important and of concern. Integrity of critical infrastructure relies substantially on the performance of their foundations. The proposed research program aims to develop sustainable and resilient deep foundations and buried structures for infrastructure projects, which will withstand environmental hazards and will save resources. This research will develop, test and analyze resilient and sustainable foundations and buried structures for highway and road infrastructure and will evaluate the seismic performance of different deep foundations and buried structures. The research will be accomplished using novel shake table testing and the state-of-the-art newly-established Western Geotechnical Centrifuge. In addition, full scale testing of innovative pile options and guidelines will be developed for their design. In particular, this research will investigate developing innovative grouted helical piles that can provide efficient and resilient foundation option for bridge infrastructure, and investigate an efficient precast three-sided reinforced concrete (TSRC) culverts for road and highway infrastructure and develop specific guidelines for their design. This is particularly important as the current practice used for design as specified in Canadian Highway Bridge Design Code (CHBDC) treats TSRC culverts same as the conventional box culverts, which results in overly conservative and expensive design. The developed design guidelines will be submitted to the relevant CHBDC committee for consideration of incorporating them in the next version of the code. The research will also investigate the seismic performance of helical piles and pressure grouted helical piles. The findings from this study will allow bridge engineers to use these foundation options to support bridges and other transportation infrastructure in seismic active regions across Canada. In addition, the seismic response of pile-supported bridges will be analyzed using machine learning-based approach. This will lead to quantifying the in-earthquake damage and post-earthquake carrying capacity of damaged bridges for operations. These results can assist transport agencies to assign damage tags immediately after the earthquake for public cognition (e.g., green, yellow and red tags for full operation, limited operation, and close, respectively). It is anticipated that this research program will benefit many new infrastructure projects and assessing the seismic vulnerability of existing ones.

最近的地震目睹了由于地面运动，土壤清算和相关的侧向扩散而严重损坏了桥梁和建筑结构。加拿大新的2020年国家建筑法规简化了大多数加拿大主要城市的地震危险。特别是，不列颠哥伦比亚省和魁北克城市 - 马特瓦（Montreal-Ottawa）的走廊具有地震活跃。这是建筑环境的可持续性和弹性变得越来越重要和关注。关键基础设施的完整性基本上取决于其基础的绩效。拟议的研究计划旨在为基础设施项目开发可持续和抵抗力的深层基础和建筑结构，这将承受环境危害并节省资源。这项研究将开发，测试和分析高速公路和道路基础设施的韧性和可持续基础，并建立结构，并评估不同深层基础和建筑结构的地震性能。这项研究将使用新颖的摇台测试和最先进的西方岩土工程离心机来完成。此外，将针对其设计制定全面测试创新的桩选项和准则。特别是，这项研究将调查开发创新的区域螺旋钢琴，这些钢琴可以为桥梁基础设施提供有效且具有抵抗力的基础选择，并研究有效的预制三面钢筋混凝土（TSRC）涵洞，用于公路和高速公路基础设施，并为其设计开发特定的指南。这一点尤其重要，因为加拿大高速公路桥设计代码（CHBDC）中指定的当前实践对待TSRC涵洞与常规盒子涵洞相同，这导致过于保守和昂贵的设计。开发的设计指南将提交给相关的CHBDC委员会，以考虑将其纳入下一版本的代码中。该研究还将研究螺旋钢琴和压力种植的螺旋钢琴的地震性能。这项研究的发现将使桥梁工程师能够使用这些基础选择来支持加拿大地震活跃地区的桥梁和其他运输基础设施。此外，将使用基于机器学习的方法分析桩支撑桥的地震反应。这将导致量化损坏的桥梁运营的损坏和地球后载体能力。这些结果可以帮助运输机构在地震发生公共认知后立即分配损害标签（例如，绿色，黄色和红色标签分别用于全部操作，有限的操作和关闭）。预计该研究计划将使许多新的基础设施项目受益，并评估现有研究的地震脆弱性。