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，这要归功于大规模木材面板（MTP）的进步。MTP是大型工程木制品，可用作建筑物中的预制墙，地板和屋顶元件。由于其易于预制和干燥施工过程，MTP已越来越多地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容易出现振动引起的问题，包括人为引起的地板振动和声音传输。然而，目前还没有通用的振动舒适性设计方法，对MTP楼盖的冲击声隔声性能的认识也非常有限。 建议的综合研究计划将弥合在振动适用性设计和大量木地板系统的振动声学性能的技术信息的差距。本研究将探讨各种MTP楼板系统的振动适用性设计及振动声学性能。这项研究将在对楼板系统的振动特性及其与结构接缝相互作用的透彻理解的基础上进行。长期目标是为大规模木地板系统开发综合地板设计方法和创新的隔音解决方案。短期目标是通过试验和数值模拟方法研究各种大体积木地板系统的振动适用性性能、在冲击荷载作用下的振动声学特性以及冲击声在连接点之间的传播机理。该研究项目的成果将直接促进NBCC和CSA-O 86关于大规模木地板系统振动适用性设计方法和大规模木建筑噪声控制的进展。该研究项目的成果将使加拿大的木结构建筑业和森林产品业受益，（a）通过系统的建筑解决方案促进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，减少建筑业的碳足迹;（B）由于改善了隔音性能，提高了对多户木结构建筑的接受程度。该研究计划还将在UNBC的综合木材工程计划中培训具有建筑声学和振动专业知识的HQP，并具有综合木材设计能力，他们准备为新兴的大规模木材建筑行业做出贡献。最终，我的研究计划的成功实施将有助于通过木材运动在加拿大的绿色建筑，并将产生新的经济机会，在住宅和商业建筑市场的中层木结构。

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.