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Response of mass timber elements subjected to full burnout fires

大量木材构件在完全烧毁火灾中的反应

基本信息

批准号：
2585977
负责人：
金额：
--
依托单位：
University of Edinburgh
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2585977
关键词：
Response mass timber elements subjected

项目摘要

The title of my suggested research topic is ''Response of mass timber elements subjected to full burnout fires''. This is recognised as a significant research gap that is attracting considerable interest in the scientific and industrial literature at the moment, due to the uncertainties and challenges that it poses for designers and engineers.The interaction of fire decay phase with timber elements' cooling phase has critically important impacts on the residual structural capacity of mass timber structural elements, and hence affects the overall building stability. There remain many unexplained phenomena when it comes to the material response of timber under load and when cooled. In terms of structural engineering, measuring the strength and stiffness recovery of mass timber elements after it has been heated and cooled will be used to determine to what extend timber recovers after a fire. Since mass timber elements are composites, the assessment of the adhesive performance will be a complementary addition to this study. Finally, the influence of moisture is often overlooked when analysing structures in the cooling phase. Where the timber is not charred nor pyrolyzed, the change in moisture content can have a considerable negative impact, even beyond that of elevated temperatures; an aspect which will also be analysed.The proposed research analysis will consist of 3 stages. An extensive literature review is planned for Stage 1. Stage 2 will include experimental work where small - and medium-scale tests will be performed under the application of heat and load. Finally, in Stage 3, a parametric analysis of the results will be performed and discussed, and predictive models will be developed and used to develop practical design and analysis guidance for use by engineers (which is necessary to maximise research impact).Conduction and realisation of every step of the research, as well as the intended work publication or presentation, will be thoughtfully communicated with and guided by the supervisors of the project.Knowledge about the performance of mass timber elements in recovery phase will enhance the safe design of sustainable buildings by addressing the important fire safety risks and post-fire performance.

我建议的研究课题的标题是“大规模木材元素受到完全烧毁火灾的反应”。这被认为是一个重大的研究空白，目前在科学和工业文献中引起了相当大的兴趣，因为它给设计师和工程师带来了不确定性和挑战。火灾衰减阶段与木构件冷却阶段的相互作用对大规模木结构构件的剩余结构能力有至关重要的影响，从而影响整体建筑的稳定性。木材在受载和冷却时的材料响应仍有许多无法解释的现象。在结构工程方面，测量大量木材元件在加热和冷却后的强度和刚度恢复将用于确定木材在火灾后恢复到何种程度。由于大量的木材元素是复合材料，粘合性能的评估将是一个补充除了这项研究。最后，在冷却阶段分析结构时，水分的影响常常被忽略。如果木材没有被烧焦或热解，水分含量的变化可能会产生相当大的负面影响，甚至超过高温的影响;这方面也将进行分析。拟议的研究分析将包括3个阶段。计划在第1阶段进行广泛的文献综述。第二阶段将包括实验工作，在加热和负荷条件下进行中小型试验。最后，在第3阶段，将对结果进行参数分析并进行讨论，开发预测模型，并用于开发实用设计和分析指南，供工程师使用（这是最大限度地提高研究影响所必需的）。研究的每一步的进行和实现，以及预期的工作出版或演示，将与项目主管进行深入的沟通，并得到项目主管的指导。了解大规模木材构件在恢复阶段的性能，将通过解决重要的消防安全风险和火灾后的性能，提高可持续建筑的安全设计。