Structural Fire Performance of Engineered-Wood Building Systems

工程木建筑系统的结构防火性能

• 批准号: RGPIN-2014-05066
• 负责人: Salem, Osama(Sam)
• 金额: $ 1.6万
• 依托单位: Lakehead University
• 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=588190
• 关键词: Structural; Fire; Performance; Engineered; Wood

Wood has been in demand as a competent construction material due to its beauty, economy, and ease of construction. However, in fire conditions light-wood structural members, if not treated, can perform poorly. On the contrary, heavy timber sections such as those made of glued-laminated (Glulam) and cross-laminated timbers (CLT) can retain their strength for a longer period of time in fire, since heavy wood sections lose strength slowly and only as material is lost through surface charring. In addition, those new engineered-wood products offer a strong combination of environmental performance and sustainability. Nevertheless, concerns about their structural fire performance have resulted in regulations that restrict their use through the prescriptive provincial and national codes and standards. The main objective of the research program proposed in this application is to investigate the structural fire performance of Glulam and CLT members and assemblies. Another important issue that needs to be investigated in this program is the different connecting configurations of structural members made of the aforementioned engineered-wood products. Accordingly, this research program will include both normal and elevated temperature examination of different types of connection configurations, such as bolted shear- and moment-resisting connections, as well as new assembling configurations that can improve the structural performance of Glulam members at elevated temperatures. The results obtained from this research will address important fire safety issues that could adversely affect potential markets for engineered-wood products in Canada. The proposed research program has a number of short and long term objectives. In the short term, producing new and reliable experimental data for the behaviour of both common and new bolted connections used in Glulam framed systems at both normal and elevated temperatures, as well as developing non-linear finite element computer models that can accurately simulate the structural behaviour of those connections are targeted in this program. In addition, training highly qualified individuals including undergraduate and graduate students who will use their aquired training and hands-on experience in different structural fire engineering applications is another important objective. In the long term, the results and findings of this research program will contribute to the advancement of the design of low- to mid-rise buildings made of engineered-wood products in Canada. In order to achieve the abovementioned objectives, the proposed research will involve three different themes: experimental testing, computer modelling, and analytical study. The experimental program will be conducted in two phases; the normal and elevated temperature testing phases. A state-of-the art large gas furnace housed in the new Structural Fire Research Facility at Lakehead University will be used to accommodate the planned fire resistance experiments. A computer finite element modelling study using the commercial finite element software package ABAQUS will follow each set of tests in order to simulate the structural behaviour of the tested connections and assemblies made of Glulam and CLT. In a subsequent phase, the results of the experimental testing program along with the predictions of the computer models will be integrally used to carry out an analytical study that will lead to the development of fire-safe design guidelines for the tested assemblies and connections. It is highly anticipated that the unique experimental results and the computer modelling outcomes of this research program will improve our understanding of the structural fire performance of engineered-wood building systems and help us having safer buildings in Canada.

木材因其美观、经济和易于施工而被用作合格的建筑材料。然而，在火灾条件下，轻质木材结构构件，如果不处理，可以表现不佳。相反，由胶合板（Glulam）和交叉层压木材（CLT）制成的重型木材可以在火灾中保持更长时间的强度，因为重型木材的强度损失缓慢，并且只有当材料通过表面炭化损失时。此外，这些新的工程木材产品提供了环境性能和可持续性的有力结合。然而，对它们的结构防火性能的担忧导致了通过规定性的省级和国家法规和标准限制它们的使用的法规。本申请中提出的研究计划的主要目标是调查集成材和CLT构件和组件的结构防火性能。本计划中需要研究的另一个重要问题是由上述工程木制品制成的结构构件的不同连接配置。因此，这项研究计划将包括正常和高温检查不同类型的连接配置，如螺栓抗剪和抗弯连接，以及新的组装配置，可以提高胶合板构件在高温下的结构性能。从这项研究中获得的结果将解决重要的消防安全问题，可能会对加拿大工程木材产品的潜在市场产生不利影响。该研究计划有一系列短期和长期目标。在短期内，生产新的和可靠的实验数据的行为，共同和新的螺栓连接在胶合板框架系统在正常和高温下，以及开发非线性有限元计算机模型，可以准确地模拟这些连接的结构行为是在这个程序的目标。 此外，培养高素质的个人，包括本科生和研究生谁将使用他们所获得的培训和实践经验，在不同的结构消防工程应用是另一个重要目标。从长远来看，这项研究计划的结果和发现将有助于推动加拿大工程木产品建造的中低层建筑的设计。 为了达到上述目标，拟议的研究将涉及三个不同的主题：实验测试，计算机建模和分析研究。实验计划将分两个阶段进行;正常和高温测试阶段。一个国家的最先进的大型燃气炉安置在新的结构火灾研究设施在湖首大学将被用来容纳计划的耐火实验。使用商用有限元软件包ABAQUS进行的计算机有限元建模研究将遵循每组测试，以模拟由集成材和CLT制成的测试连接和组件的结构行为。在随后的阶段中，实验测试程序的结果沿着计算机模型的预测将被综合用于进行分析研究，从而为测试组件和连接制定防火设计指南。值得高度期待的是，这项研究计划的独特实验结果和计算机建模结果将提高我们对工程木建筑系统结构防火性能的理解，并帮助我们在加拿大拥有更安全的建筑。