Development and characterization of efficient connections for multi-storey timber buildings

多层木结构建筑高效连接的开发和表征

• 批准号: RGPIN-2017-05890
• 负责人: Salenikovich, Alexander
• 金额: $ 1.53万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 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=664149
• 关键词: Development; characterization; efficient; connections; multi

During the last few years, multi-storey timber construction has been promoted by the wood industry and by the governments in Canada and in other countries with abundant forest resources. This trend has been justified for the ecological reasons (reduced environmental footprint, sustainability), architectural attractiveness (aesthetics, health, comfort) and development of new engineered wood products, such as mass timber panels, suitable for construction of mid-rise and tall buildings. Because of their light weight, timber structures may take advantage when used to resist seismic forces. However, to turn the multi-storey timber construction into the main stream, efficient and cost effective structural systems should be developed and specific guidance included into the design codes. ******The structural performance of timber systems primarily depends on the performance characteristics of the connections resisting lateral loads (wind and seismic), which are not well studied and are not sufficiently covered in the design codes. The efficient structural connections in multi-storey buildings should provide enough stiffness to resist high winds and enough resiliency to resist severe earthquakes with the minimum damage of the structure. However, there is not a unified approach to the evaluation of the connection properties, and the design resistance values are not based on reliability principles. The design guidance for the connections of new engineered wood products, such as cross-laminated timber (CLT), is rudimentary and is not satisfying the needs of the designers. These drawbacks reduce the efficiency of the design solutions, slow down the design process and discourage the use of wood in multi-storey buildings.******The main goal of the proposed research program is to develop efficient connections and methods of their characterization meeting the needs of multi-storey timber construction. Particular attention will be given to the connections for the lateral load resisting systems in mass timber buildings advancing the reliability principles and the low damage seismic design philosophy. The performance characteristics of the connections will be evaluated experimentally to model their hysteretic behaviour, which then will be integrated into the design models of the whole structures and validated via laboratory tests. ******This research program will contribute to the development of the design principles of timber structures for multi-storey buildings enabling the designers to choose the most effective and reliable solutions at a lower cost. Implementation of these results in the design codes will increase the competitiveness and the use of timber in the mid-rise and tall building construction in Canada. In turn, this will benefit the Canadian wood industry and, therefore, the Canadian economy and society by contributing to the development of the sustainable future.

在过去的几年里，多层木结构建筑在加拿大和其他森林资源丰富的国家得到了木材行业和政府的大力推广。由于生态原因（减少环境足迹，可持续性），建筑吸引力（美学，健康，舒适）和新工程木制品的发展，例如适合建造中高层建筑的大块木板，这种趋势是合理的。由于其重量轻，木结构在抵抗地震力时可以发挥优势。然而，要使多层木结构成为主流，就必须开发高效、经济的结构体系，并在设计规范中纳入具体指导。******木材系统的结构性能主要取决于连接的抗侧荷载（风和地震）的性能特征，这些特征没有得到很好的研究，也没有在设计规范中得到充分的涵盖。在多层建筑中，有效的结构连接应提供足够的刚度来抵抗强风，并在结构损伤最小的情况下提供足够的弹性来抵抗强烈的地震。然而，目前尚无统一的方法来评估连接性能，设计电阻值也不是基于可靠性原则。新型工程木制品，如交叉层压木（CLT）的连接设计指导是初步的，不能满足设计师的需求。这些缺点降低了设计方案的效率，减缓了设计过程，并阻碍了多层建筑中木材的使用。******该研究计划的主要目标是开发有效的连接和表征方法，以满足多层木结构建筑的需求。将特别关注大型木结构建筑中抗侧荷载系统的连接，提出可靠性原则和低损伤抗震设计理念。连接的性能特征将通过实验进行评估，以模拟其滞后行为，然后将其整合到整个结构的设计模型中，并通过实验室测试进行验证。******这项研究计划将有助于多层建筑木结构设计原则的发展，使设计师能够以较低的成本选择最有效和可靠的解决方案。在设计规范中实施这些结果将提高加拿大中高层建筑的竞争力和木材的使用。反过来，这将有利于加拿大木材工业，因此，通过促进可持续未来的发展，有利于加拿大经济和社会。