Vibration Serviceability and Vibroacoustic Performance of Mass Timber Floor Systems

加拿大是现代木结构建筑复兴的主要国家之一，这要归功于大量木质面板(MTP)的进步。MTP是一种大型工程木制品，可用作建筑中的预制墙体、地板和屋顶构件。由于易于预制和干法施工，MTP越来越多地被用作中高层木结构和混合建筑的楼板。由于其轻质结构和相对较低的刚度，MTP容易出现人致楼板振动和声音传递等振动问题。然而，目前还没有针对MTP地板的通用振动舒适性设计方法，对MTP地板的冲击隔声知识也非常有限。拟议的综合研究计划将弥合大量木材地板系统在振动适用性设计和振动声学性能方面的技术信息空白。该研究将对不同MTP楼盖系统的振动舒适性设计和振声性能进行研究。这项研究将在彻底了解楼板系统的振动行为及其与结构接缝的相互作用的基础上进行。我们的长期目标是为大型实木地板系统开发集成的地板设计方法和创新的隔音解决方案。短期目标是通过实验和数值方法研究各种质量木地板系统的振动使用性能，以及它们在冲击荷载作用下的振声行为和碰撞声在接缝之间的传播机理。这项拟议研究计划的成果将直接有助于NBCC和CSA-O86在大型木质楼板系统的振动适用性设计方法和大型木质建筑的噪声控制方面的进步。该研究项目的成果将惠及加拿大的木材建筑业和林产工业，(A)通过系统的建筑解决方案加强可持续的大规模木结构建筑的发展，这将增加中高层木结构建筑的市场份额，并减少建筑业的碳足迹；(B)由于改善了隔音性能，提高了多户木结构建筑的接受度。该研究计划还将在UNBC的集成木材工程项目中培训HQP，使其具备建筑声学和振动方面的专业知识，并具有集成的木材设计能力，他们准备为新兴的大规模木材建筑行业做出贡献。最终，我的研究项目的成功实施将通过木材移动为加拿大的绿色建筑做出贡献，并将为住宅和商业建筑市场的中层木结构创造新的经济机遇。

Canada is one of the leading countries in the renaissance of modern wood buildings thanks to the advancement of mass timber panels (MTPs). MTPs are large-scale engineered wood products that can be used as prefabricated wall, floor and roof elements in buildings. MTPs have been increasingly used as floor slabs for mid to high rise wood and hybrid buildings due to their ease of prefabrication and dry construction process. Due to their lightweight construction and relatively low stiffness, MTPs are prone to vibration induced issues including human induced floor vibration and sound transmission. However, there are no general vibration serviceability design methods for MTP floors, and the knowledge in impact sound insulation of MTP floors is also very limited. The proposed comprehensive research program will bridge the gaps in the technical information on vibration serviceability design and vibroacoustic performance of mass timber floor systems. The research will investigate the vibration serviceability design and vibroacoustic performance of various MTP floor systems. The research will be conducted on the basis of a thorough understanding of the vibrational behaviour of the floor systems and their interaction with structural joints. The long-term goal is to develop integrated floor design methods and innovative sound insulation solutions for mass timber floor systems. The short term goal is to investigate the vibration serviceability performance of various kinds of mass timber floors systems as well as their vibroacoustic behaviours under impact loads and the mechanism of impact sound transmission between junctions through experimental and numerical methods. The outcomes from this proposed research program will directly contribute to the advancement of the NBCC and CSA-O86 regarding the vibration serviceability design methods of mass timber floor systems and noise control in mass timber buildings. The outcomes from the research program will benefit the wood construction industry and forest product industry in Canada, (a) by enhancing the development of sustainable mass timber buildings with systematic building solutions, which will increase the market share of mid- to high-rise wood building and reduce the carbon footprint of the building industry; (b) by increasing the acceptance of multi-family wood buildings due to improved sound insulation performance. The research program will also train HQP with specialist knowledge on building acoustics and vibration with integrated wood design capabilities in the Integrated Wood Engineering program at UNBC who are ready to contribute to the emerging mass timber construction industry. Ultimately, the successful implementation of my research program will contribute to the green construction through wood movement in Canada and will generate new economic opportunities for mid-rise wood constructions in residential and commercial building markets.