Connection of Hollow-Core Slabs to Masonry Walls

预制预应力空心板因其为楼板或屋面系统，特别是大跨度楼板或屋面系统提供了一种经济的解决方案而被广泛应用于建筑施工中。HCS的其他优势包括施工简单、速度快、耐火性高、耐久性增强和可持续性。据估计，1962至2016年间，加拿大建造了5000多万平方米的HCS楼层。作为标准施工实践，钢筋用于将HCS楼板连接到建筑结构。目前的设计手册说明了许多HCS轴承连接到支撑结构的详细设计实例。然而，由于缺乏实验数据，描述中没有包括设计方法或预期容量。申请人与加拿大预制/预应力混凝土研究所(加拿大预制/预应力混凝土技术信息的主要来源)和专注于预制建筑的加拿大咨询公司Tower Engineering Group合作，进行了一项广泛的研究，以调查加拿大东部常用的钢筋连接配置的性能。得出的结论是，这种钢筋连接不能满足三层或三层以上受拉力的砖房的要求。这表明，目前使用的钢筋连接不能确保HCS楼板的结构完整性。基于上述研究结果，本研究建议重点研究使用典型的加拿大西部钢筋细节的HCS和支撑砖墙之间的连接，与加拿大东部的细节相比，这有望提供更高的横向承载力和更低的横向位移。将进行全面的实验室测试、分析和数字调查，以评估这种连接的性能。通过这个项目将培训四名高素质的人员。这项工作将产生可靠的设计准则，并将为市政和公共工程等基础设施所有者带来性能更好、耐久性更好的安全新结构。

Precast, prestressed hollow-core slabs (HCS) are widely used in building construction since they offer an economical solution for a floor or roof system, especially those with large spans. Other advantages of HCS include ease and speed of construction, high levels of fire resistance, enhanced durability, and sustainability. It was estimated that, between 1962 and 2016, more than 50 million square meters of HCS floors have been constructed in Canada. As standard construction practice, reinforcing bars are used to connect the HCS floors to the building structure. The current design manuals illustrate numerous examples of detailing for HCS bearing connections to supporting structures. However, due to lack of experimental data, a design methodology or an expected capacity are not included in the description. In collaboration with the Canadian Precast/Prestressed Concrete Institute, which is the prime source of technical information about precast/prestressed concrete in Canada, and Tower Engineering Group, a Canadian consulting firm with focus on precast buildings, the applicant has conducted an extensive research study to investigate the behaviour of bar connection configurations that are commonly used in Eastern Canada. It was concluded that such bar connections did not satisfy the requirements for masonry buildings of three-or-more storeys under tension forces. This indicates that currently used reinforcing bar connections cannot ensure the structural integrity of HCS floors. Based on the findings of the above study, this research proposal focuses on the connection between HCS and supporting masonry walls using typical Western Canada reinforcing bar details, which is expected to provide higher lateral capacity and a lower lateral displacement compared to Eastern Canada detailing. Full-scale laboratory testing, analytical and numerical investigations will be conducted to assess the performance of such connections. Four highly qualified personnel will be trained through this project. This work will result in reliable design guidelines and will lead to safe and new structures with improved performance and better durability for infrastructure owners such as Municipalities and Public Works.