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

木材被广泛用于建筑物中的高架地板。传统上，轻型框架，木材托梁地板 ** 在北美和其他地方是木材建筑的代名词，但更新的选择适合 ** 所有木材和混合建筑超过4层。交叉层压木材（CLT）是一种非常适合于建造楼板的预制厚木板产品的通用名称。CLT产品的吸引力在于它们具有较低的质量刚度和强度比。这提供了运输和施工现场处理的优势，并可导致上部结构和基础系统的大量成本节约。另一方面，使用CLT并不是简单地用一种材料代替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楼板可能会增加楼板的振动适用性性能问题。可用的CLT设计指南 ** 在解决建筑复杂性（如楼板详图、楼板 ** 属性、楼层和建筑参数）方面是有限的。本申请中提出的努力将使用现场 ** 测试来研究这些参数对许多基准CLT地板的振动特性的影响。在本项目中，将对各种地板设计进行一系列现场振动测试。在这些 ** 测试中，将使用一组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楼板的振动频率、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目前在CLT地板设计和 ** 施工方面的做法;确定他们的设计方法是否考虑了所有 ** 重要参数;并了解他们如何在考虑振动适用性标准的情况下更好地优化地板设计和施工 **。

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.