Displacement-based design of cross-laminated timber structures

基于位移的交叉层压木结构设计

• 批准号: 515521-2017
• 负责人: Tannert, Thomas
• 金额: $ 1.82万
• 依托单位: University of Northern British Columbia
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=640335
• 关键词: Displacement; based; design; cross; laminated

Although the benefits of using timber in mid- and high-rise construction are undisputed, there are perceivedshortcomings with respect to the corresponding lack of appropriate design guidance. Overcoming theseperceived shortcomings will allow timber, and its wood product derivatives, to further expand into thenon-residential construction sector. Cross-laminated Timber (CLT), an emerging mass-timber product, offers aseries of advantages in terms of load-carrying capacity, building physics performance and level ofprefabrication compared to light-frame wood construction. As such CLT constitutes a promising solution fornumerous structural applications, including for large and tall residential and commercial buildings.Of specific concern from an engineering perspective is the absence of reliable models for predictingfundamental dynamic characteristics and deformation of CLT buildings under seismic and wind loads. Withrespect to the seismic problem, in accordance with the current performance-based design philosophy, newstructures need to satisfy both safety and damage limit state requirements. The direct displacement-baseddesign (DDBD) approach represents the rational design choice to ensure multiple performance objectives aremet.The company-specific problem that will be addressed is the provision of DDBD design guidance formulti-storey CLT structures, establishing a direct link between the single structural member and theconstruction system as a whole and directly assessing their level of deformation. After the project conclusion,the company will have a better understanding how to apply DDBD to projects where architects and developersare interested in applying CLT systems.

虽然在中高层建筑中使用木材的好处是无可争议的，但也存在明显的缺点，即相应地缺乏适当的设计指导。克服这些已知的缺点将使木材及其木材产品衍生物进一步扩展到非住宅建筑部门。交叉层积材（CLT）是一种新兴的大体积木材产品，与轻型木结构相比，在承载能力、建筑物理性能和预制水平等方面具有一系列优势。因此，CLT构成了一个很有前途的解决方案，为众多的结构应用，包括大型和高层住宅和商业buildings.Of从工程的角度来看，特别关注的是缺乏可靠的模型来预测基本的动态特性和变形的CLT建筑在地震和风荷载。关于抗震问题，按照目前基于性能的设计理念，新结构需要满足安全和破坏极限状态的要求。直接基于位移的设计（DDBD）方法代表了合理的设计选择，以确保满足多个性能目标。将解决的公司特定问题是提供DDBD设计指导公式多层CLT结构，在单个结构构件和整个建筑系统之间建立直接联系，并直接评估其变形水平。项目结束后，公司将更好地了解如何将DDBD应用于建筑师和开发人员有兴趣应用CLT系统的项目。