Vibration Performance of Cross-Laminated-Timber (CLT) Floors

交叉层压木 (CLT) 地板的振动性能

• 批准号: 532623-2018
• 负责人: Arjomandi, Kaveh
• 金额: $ 1.82万
• 依托单位: University of New Brunswick
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=644127
• 关键词: Vibration; Performance; Cross; Laminated; Timber

Timber is widely used to construct elevated floors in buildings. Traditionally, light-frame, lumber-joisted floors**were synonymous with timber construction in North America and elsewhere, however newer options suit**construction of all timber- and hybrid-buildings taller than 4 stories. Cross-Laminated-Timber (CLT) is the**generic name for a class of prefabricated, thick timber-plate products well suited to construction of slab floors.**The attractiveness of CLT products is that they have low mass to stiffness and strength ratios. This provides**transportation and construction site handling advantages, and can lead to substantial cost savings for**superstructure and foundation systems. On the other hand, using CLT is not simply a matter of substituting one**material for another of equal strength or stiffness. Like other relatively lightweight slabs, CLT slabs potentially**increase a floor's proneness to vibration serviceability performance problems. Available CLT design guidelines**are limited when it comes to addressing the construction complexities such as floor detail, floor panel**properties, story level, and architectural parameters. The efforts proposed in this application will investigate the**effects of these parameters on the vibration characteristics of a number of benchmark CLT floors using in-situ**tests.**In this project, a series of on-site vibration tests will be performed on a variety of floor designs. In these**tests, an array of accelerometer sensors will be used to perform operational modal analysis of the panels. The**analysis results will be used to extract the floor's vibration frequencies, mode shapes, and damping ratios. This**project will help the industrial partner to better understand how their current practice in the design and**construction of CLT floors is performing; to determine whether their design approach is considering all the**important parameters; and to understand how they can better optimize their floor design and construction**considering the vibration serviceability criteria.

木材广泛用于建造建筑物的高架地板。传统上，轻型框架、木材托梁地板**是北美和其他地方木结构建筑的代名词，但较新的选择适合**所有高于 4 层的木材和混合建筑的建筑。交叉层压木材 (CLT) 是**一类预制厚木板产品的通用名称，非常适合楼板结构。**CLT 产品的吸引力在于它们具有较低的质量、刚度和强度比率。这提供了**运输和施工现场处理优势，并可以为**上部结构和基础系统节省大量成本。另一方面，使用 CLT 并不是简单地用一种材料替换另一种具有相同强度或刚度的材料。与其他相对轻质的楼板一样，CLT 楼板可能会增加地板出现振动适用性性能问题的可能性。现有的 CLT 设计指南**在解决建筑复杂性（例如地板细节、地板面板**属性、楼层和建筑参数）时受到限制。本申请中提出的工作将利用原位**测试来研究这些参数对许多基准 CLT 地板振动特性的影响。**在该项目中，将进行一系列现场振动测试。在各种地板设计上进行。在这些**测试中，将使用一系列加速度传感器对面板进行操作模态分析。 **分析结果将用于提取地板的振动频率、振型和阻尼比。该**项目将帮助工业合作伙伴更好地了解他们当前在 CLT 地板设计和**施工方面的实践表现如何；确定他们的设计方法是否考虑了所有**重要参数；并了解他们如何更好地优化地板设计和施工**考虑到振动适用性标准。