Seismic Design, Detailing, and Retrofit of Reinforced Concrete Masonry Shear Walls

钢筋混凝土砌体剪力墙的抗震设计、详图和改造

• 批准号: RGPIN-2020-05540
• 负责人: Galal, Khaled
• 金额: $ 2.62万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=740643
• 关键词: Seismic; Design; Detailing; Retrofit; Reinforced

Canada has active seismic zones in its western and eastern regions. Buildings located in these areas are prone to severe damage or collapse if they are not designed and detailed to perform well under seismic hazard. Despite the considerable size of the reinforced concrete masonry (RCM) construction industry, there has been limited research that investigates the seismic performance of new RCM systems. Reinforced concrete masonry shear walls are typically used in medium- to high-rise masonry buildings as part of the seismic force-resisting system (SFRS) to provide the lateral strength, stiffness, and energy dissipation capacity required to resist the lateral loads arising from earthquakes. For both new and existing RCM buildings, there is a vital need to develop novel and creative engineering solutions to safeguard society against potential structural seismic failures. The long-term objective of the applicant's research program is to advance the understanding of the seismic behaviour of masonry structures, and utilize that understanding to develop models, design tools, and code provisions to facilitate the development, design, and construction of sustainable and seismic hazard-resilient masonry buildings. In the short-term, the applicant will focus on two research axes: (1) The seismic design and detailing of RCM buildings; and (2) The seismic retrofit of reinforced concrete masonry buildings. The specific research within these two axes will focus on RCM shear walls to: (1.a) Evaluate the behaviour of RCM boundary elements under cyclic axial strains; (1.b) Develop code provisions for the detailing of RCM shear walls with boundary elements, specifically, the interface between the wall's web and the boundary element, the strain distribution in the wall's web, and the lap splicing of vertical reinforcements in the web and in the boundary element; (1.c) Develop design recommendations for the gravity walls and vertical extents of boundary elements in ductile RCM shear walls; (2.a) Develop seismic retrofit methods for shear critical reinforced critical masonry walls using fibre-reinforced polymer (FRP) composites; and (2.b) Develop code provisions for retrofitting deficient RCM walls. This research program will make significant contributions to enhancing the seismic performance of new and retrofitted RCM buildings. This improved seismic performance will result in significant socio-economic benefits to Canada, as it will enhance seismic hazard safety for Canadians. The experimental tests will provide a timely, valuable, and diversified database and benchmark that will significantly contribute to the development of the CSA S304 2024 design standard and the NBCC 2025 code edition. The outcomes of this research program will result in new fundamental knowledge, advancements in construction practices, code design provisions and specific detailing requirements, in addition to the specialized training of highly qualified engineers and researchers.

加拿大在其西部和东部地区都有积极的地震区域。如果这些建筑物的设计不设计和详细，则在这些地区的建筑物容易受到严重损害或崩溃，在地震危险下表现良好。尽管钢筋混凝土砌体（RCM）建筑行业的规模相当大，但仍有有限的研究研究了新的RCM系统的地震性能。钢筋混凝土砌体剪切壁通常用于中型至高层砌体建筑物中，作为抗震力抗压系统（SFRS）的一部分，以提供横向强度，刚度和能量耗散能力，以抵抗由地震产生的横向载荷。对于新的和现有的RCM建筑物，至关重要的是开发新颖和创造性的工程解决方案，以保护社会免受潜在的结构性地震失败。 申请人研究计划的长期目标是提高人们对砌体结构的地震行为的理解，并利用这种理解来开发模型，设计工具和代码规定，以促进可持续和地震危害危险危险的砌石建筑的开发，设计和建设。在短期内，申请人将重点关注两个研究轴：（1）RCM建筑物的地震设计和细节； （2）钢筋混凝土砌体建筑的地震改造。这两个轴内的特定研究将集中在RCM剪力壁上：（1.A）评估循环轴向应变下RCM边界元素的行为； （1.b）开发代码规定，以详细介绍带有边界元素的RCM剪力墙，特别是墙壁网和边界元素之间的接口，墙壁网中的应变分布以及网络中垂直增强的圈剪接； （1.c）为延性RCM剪切壁中的重力壁和边界元素的垂直范围开发设计建议； （2.a）使用纤维增强聚合物（FRP）复合材料开发用于剪切临界加固临界砌体壁的地震改造方法； （2.b）开发用于改造缺陷RCM墙的代码规定。 该研究计划将为增强新的和改装的RCM建筑物的地震性能做出重大贡献。这种改善的地震表现将为加拿大带来重大的社会经济利益，因为这将增强加拿大人的地震危害安全性。实验测试将提供及时，有价值和多元化的数据库和基准测试，这将极大地有助于CSA S304 2024设计标准和NBCC 2025代码版的开发。该研究计划的结果还将带来新的基本知识，建筑实践的进步，代码设计规定和特定的细节要求，以及对高素质的工程师和研究人员的专业培训。