Vibration Serviceability and Vibroacoustic Performance of Mass Timber Floor Systems

大体积木地板系统的振动适用性和振动声学性能

• 批准号: RGPIN-2020-06808
• 负责人: Zhou, Jianhui
• 金额: $ 1.68万
• 依托单位: University of Northern British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=741444
• 关键词: Vibration; Serviceability; Vibroacoustic; Performance; Mass

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.

由于大量木材面板（mtp）的进步，加拿大是现代木结构建筑复兴的主要国家之一。mtp是大型工程木制品，可以用作建筑物中的预制墙、地板和屋顶构件。由于易于预制和干燥施工过程，mtp越来越多地被用作中高层木结构和混合结构建筑的楼板。由于其轻质结构和相对较低的刚度，mtp容易产生振动诱发问题，包括人为引起的地板振动和声音传播。然而，目前对于MTP地板的抗振性设计尚无通用的方法，对MTP地板的冲击隔声的认识也非常有限。拟议的综合研究计划将弥合在振动可使用性设计和大型木地板系统振动声学性能方面的技术信息差距。本研究将探讨各种MTP楼板系统的耐振性设计及声振性能。研究将在全面了解楼板系统的振动行为及其与结构节点的相互作用的基础上进行。长期目标是开发综合地板设计方法和大型木地板系统的创新隔音解决方案。短期目标是通过实验和数值方法研究各种大质量木地板系统的振动使用性能，以及它们在冲击载荷下的振动声行为和节点之间的冲击声传递机制。这一研究计划的成果将直接促进NBCC和CSA-O86在大型木结构建筑地板系统的振动适用性设计方法和噪音控制方面的进步。该研究项目的成果将有利于加拿大的木结构建筑行业和林产品行业，(a)通过系统的建筑解决方案加强可持续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，减少建筑行业的碳足迹；(b)由于隔音性能改善，增加多户木结构建筑的接受度。该研究项目还将在UNBC的综合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，并具备综合木材设计能力，为新兴的大规模木材建筑行业做出贡献。最终，我的研究计划的成功实施将通过加拿大的木材运动为绿色建筑做出贡献，并将为住宅和商业建筑市场的中层木结构建筑带来新的经济机会。