Punching-shear strength of cross-laminated timber panels

迫切需要研究开发木材的新颖和增值应用，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。与轻型框架木结构或混凝土结构相比，交叉叠层木材(CLT)具有许多优点，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景的解决方案，包括用作大型住宅和商业建筑的地板。建筑行业普遍认为，柱+板结构体系，其中CLT直接点支承在没有梁的柱上，是大体积木材中高层多单元住宅结构中最具成本竞争力的；它是一种结构解决方案，可以在私人开发商的水平上与混凝土或钢材竞争。然而，对于CLT板的冲切设计缺乏科学的设计指导是广泛采用的最大障碍。利用实验方法，本联盟项目将研究CLT冲切强度，并提出点支承CLT楼板的设计方法。

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 floors for large residential and commercial buildings. It is widely agreed in the construction industry that Post+Panel structural systems, where CLT are directly point-supported on columns without beams, are the most cost competitive for mass timber mid and high-rise multi-unit residential structures; it is the structural solution that can compete with concrete or steel at a private developer level. However, the lack of scientific design guidance for the punching shear design of CLT panels is the most significant barrier to widespread adoption. Using experimental methods, this Alliance project will investigate the CLT punching shear strength and propose design methods for point supported CLT floors panels.