Enhancing the structural performance of wood I-joists and system behaviour of structures containing wood I-joists

增强木质工字托梁的结构性能和包含木质工字托梁的结构的系统行为

• 批准号: 109473-2011
• 负责人: Chui, YingHei
• 金额: $ 1.53万
• 依托单位: University of New Brunswick
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=569154
• 关键词: Enhancing; structural; performance; wood; joists

Wood I-joists are a dominant product in residential floor construction and are used in about 60% of new floor construction in North America. Further research is required to expand the application of the product to non-residential construction and in tall buildings. The proposed research program will build on earlier research achievements at the University of New Brunswick on wood I-joists. The overall goal of the proposed research program, which consists of 4 thesis projects, is to develop technical tools and building systems that will allow wood I-joists to be used in non-residential and tall building applications. For this overall goal to be fulfilled there is a need to address the features of the product that limit its load-carrying capacity. To this end two of the four projects will investigate the strengths of the product in bearing at support points and when a web opening is present, whereas the remaining two will investigate the performance of structural sub-systems comprising wood I-joists. Project 1 will develop an analytical approach to predict the load-carrying capacity of wood I-joist with a web opening. The innovation of this approach is its ability to account for the influence of bending moment and can be simplified to be used for design purpose. Project 2 is aimed at developing a method to improve the bearing strength of wood I-joists. It will investigate the use of mechanical fasteners to improve bearing strength, which may be the critical design factor in non-residential applications. Project 3 will study the application of deep wood I-joists in long span floor applications in multi-storey buildings. Of specific interest is the diaphragm action of floor systems built with these deep wood I-joists, and how it affects the performance of mid-rise wood frame buildings when subjected to lateral loads arising from seismic and wind events. Project 4 will investigate the performance of an innovative composite floor system consisting of wood I-joists and cross laminated timber (CLT) plate. The proposed research will complement the research activities of a 5-year NSERC Strategic Network on Innovative Wood Products and Building Systems which is led by the applicant.

木i-咖啡师是住宅地板建设中的主要产品，在北美的新地板建筑中约60％使用。需要进一步的研究以扩大产品在非住宅建筑和高建筑物中的应用。拟议的研究计划将基于新不伦瑞克大学的木材I-咖啡师的早期研究成就。由4个论文项目组成的拟议研究计划的总体目标是开发技术工具和建筑系统，这些工具和建筑系统将允许木材的i-toist在非住宅和高层建筑应用中使用。为了实现这一总体目标，需要解决限制其负载能力的产品的功能。为此，四个项目中的两个将调查产品在支持点的轴承方面的优势，而当存在网络开放时，其余两个将调查包括木材I-Joist的结构子系统的性能。项目1将开发一种分析方法，以通过网络开放来预测木材I-joist的负载能力。这种方法的创新是其能够说明弯曲时刻影响的能力，并可以简化以用于设计目的。项目2旨在开发一种方法来提高木材I-咖啡师的轴承强度。它将调查使用机械紧固件来提高轴承强度的使用，这可能是非住宅​​应用中的关键设计因素。项目3将研究深木I-咖啡师在多层建筑中长期楼层应用中的应用。特定感兴趣的是用这些深木I-咖啡师建造的地板系统的隔膜作用，以及它如何影响中层木框建筑物的性能，并受到地震和风事件的横向负载。项目4将调查由木材I-咖啡师和交叉层压木板（CLT）板组成的创新复合地板系统的性能。拟议的研究将补充由申请人领导的创新木材产品和建筑系统的5年NSERC战略网络的研究活动。