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，加拿大和其他森林资源丰富的国家的木材工业和政府大力推广多层木材建筑。这一趋势是合理的生态原因（减少环境足迹，可持续性），建筑吸引力（美学，健康，舒适）和新的工程木制品的发展，如质量木材面板，适合建造中高层建筑。由于其重量轻，木结构在用于抵抗地震力时可以发挥优势。然而，要使多层木结构建筑成为主流，应开发高效和具有成本效益的结构系统，并在设计规范中纳入具体指导。** 木结构系统的结构性能主要取决于连接件抵抗横向荷载（风荷载和地震荷载）的性能特征，这一点尚未得到很好的研究，设计规范中也未充分涵盖。在多层建筑中，有效的结构连接应该提供足够的刚度来抵抗强风，并提供足够的弹性来抵抗严重的地震，同时使结构的损坏最小化。 然而，没有一个统一的方法来评估连接性能，设计电阻值不是基于可靠性原则。新的工程木制品，如交叉层压木材（CLT）的连接设计指南是基本的，不能满足设计师的需求。这些缺点降低了设计解决方案的效率，减缓了设计过程，并阻碍了多层建筑中木材的使用。拟议的研究计划的主要目标是开发有效的连接和方法，其表征满足多层木结构的需求。将特别关注大规模木结构建筑中抗侧力系统的连接，以推进可靠性原则和低破坏抗震设计理念。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。** 该研究计划将有助于发展多层建筑木结构的设计原则，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增加加拿大中高层建筑中木材的竞争力和使用。反过来，这将有利于加拿大木材工业，从而有利于加拿大经济和社会的可持续未来的发展。