High-performance cross-laminated timber shear walls

迫切需要研究开发木材的新型增值应用，以最大限度地从可持续采伐加拿大丰富的森林中获益，并通过扩大可持续材料木材的使用来减少建筑物的碳足迹。与轻型木结构或混凝土结构相比，交叉层压木材（CLT）具有许多优点，例如高水平的预制和快速安装。因此，CLT构成了许多结构应用的有前途的解决方案，包括作为大型和高层住宅和商业建筑的剪力墙，但目前缺乏CLT剪力墙的具体设计指导，导致不经济和低效的结构解决方案。需要更详细的程序来估计CLT剪力墙的阻力，特别是，关于CLT板在压下时的净截面阻力和所需紧固件数量的指导。使用实验和分析方法，该联盟项目将调查自攻螺钉（STS）作为CLT剪力墙高性能连接的可行性。该项目将促进CLT剪力墙系统中STS连接的可靠设计指导的发展，该系统构成了许多应用的有前途的解决方案，包括设计受地震荷载控制的高层结构。

There is an acute need for research to develop novel and value-added applications for wood to maximize the benefits from sustainably harvesting Canada's abundant forests and to reduce the carbon footprint of buildings by expanding the use of the sustainable material wood. Cross-laminated timber (CLT), provides many benefits when compared to either light-frame wood or concrete construction, such as a high-level of prefabrication and fast erection. As such, CLT constitutes a promising solution for numerous structural applications, including as shear walls for large and tall residential and commercial buildings, yet the current lack of specific design guidance for CLT shear walls leads to uneconomical and inefficient structural solutions. More detailed procedures to estimate the resistance of CLT shear walls are required, specifically, guidance with respect to the net section resistance of CLT panels at hold-downs and the required number of fasteners. Using experimental and analytical methods, this Alliance project will investigate the viability of self-tapping screws (STS) as high-performance connections for CLT shear walls. The project will facilitate the development of reliable design guidance for STS connections in CLT shear wall systems that constitute a promising solution for many applications, including tall structures where the design is governed by seismic loading.