Seismic performance of reinforced masonry structural walls with confined boundary elements

砖石建筑行业代表了加拿大现有和新的住宅、商业和工业低层到中层建筑的很大一部分。混凝土砌块砌块砌体结构墙是一种有效的抗震体系，可提供抵抗地震或风力引起的侧向荷载所需的侧向强度、刚度和耗能能力。在过去的十年中，在新建筑的剪力墙设计方面有了相当大的进步。这反映在最新的CSA S304-14“砌体结构设计”设计标准中，其中引入了具有约束边界元素的延性RM剪力墙。然而，有限的实验和分析数据可用于这个新提出的系统。提出的研究工作的主要目的是量化具有不同约束边界单元配置的RM剪力墙的抗震性能。具体目标集中在以下几个研究领域：(1)通过实验量化具有不同细节配置和约束水平的边界单元的RM墙的延性和抗震性能模型的增强；(2)开发实验验证的分析模型，用于基于性能的RM墙设计和评估框架；(3)为CSA S304设计标准的下一个周期提出带边界元的RM墙设计的规范导向规定。

The masonry construction industry represents a substantial portion of both existing and new residential, commercial and industrial low- to medium-rise structures across Canada. Reinforced Masonry (RM) structural walls constructed with concrete block units are an effective seismic force resisting system that provides lateral strength, stiffness and energy dissipation capacity required to resist lateral loads arising from earthquakes or wind. In the past decade, there has been considerable advancement in the design of RM shear walls for new constructions. This is reflected in the most recent CSA S304-14 "Design of Masonry Structures" design standard where ductile RM shear walls are introduced with confined boundary elements. However, limited experimental and analytical data are available for this newly proposed system. The main objective of the proposed research work is to quantify the seismic performance of RM shear walls with different configurations of confined boundary elements. The specific objectives are focused on the following research areas: (1) to quantify experimentally the enhancement of ductility capacity and seismic performance parameters of scaled models of RM walls with boundary elements with different detailing configurations and confinement levels; (2) to develop experimentally validated analytical models to be used in the framework of performance based design and assessment of RM walls; and (3) to propose code oriented provisions for the design of RM walls with boundary elements for the next cycle of the CSA S304 design standard. Besides the enhanced seismic hazard safety in Canada, the proposed research will generate new and complementary experimental and analytical fundamental knowledge, practical advancements, code design provisions and prescriptive detailing requirements, as well as training of HQP, which will have significant impact for the end users and stakeholders of the masonry manufacturing, design and construction industries in North America.