Fire Performance of HSS Steel Connections

高速钢钢连接件的防火性能

• 批准号: 371673-2013
• 负责人: Zalok, Ehab
• 金额: $ 1.53万
• 依托单位: Carleton 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=572828
• 关键词: Fire; Performance; HSS; Steel; Connections

Background: Fires can cause elevated temperature that can have adverse impact on the building elements and systems. Steel connections are vital and essential components of any steel structure. Observations from fires confirm that connections have considerable effect on the survival time of structural members due to their role in distributing forces. Hollow Steel Sections HSS are known to absorb heat energy at higher rates than thick steel sections, causing earlier yielding to occur. In a fire event, restrained steel beams can heat up quickly and cause lateral thrust on supporting columns. It is likely that columns fail because of this thrust, and not necessarily because of the elevated temperatures. Objectives: The proposed research aims to examine and evaluate, under fire conditions, the performance of existing HSS-to-HSS extended end-plate moment connections and work towards introducing a new connection capable of absorbing or redirecting the lateral thrust. Scientific approach: Using medium- and full-scale experiments, the performance of current and proposed HSS-to-HSS extended end-plate moment connections in fire conditions will be assessed. The proposed research focuses on how to utilize the catenary action in fire in order to improve the fire performance of restrained steel beams. ABAQUS finite element model will be used to analyze the couple effect of thermal and structural performance. Both design fires (for commercial and industrial type occupancies) as well as standard time-temperature profiles will be applied to the connections using a newly constructed fire facility at Carleton University's. The research is expected to advance the understanding of fire behaviour of the commonly used steel connections (not isolated connections), and propose an advanced connection that can enhance the stability in the event of fire. The results will be used to produce a fire resistance design method of beam-to-column connections.

背景：火灾会导致温度升高，对建筑构件产生不利影响， 系统.钢连接件是任何钢结构的重要组成部分。火灾观察 确认连接由于其作用对结构构件的生存时间有相当大的影响 分配兵力。已知中空型钢HSS吸收热能的速率高于厚型钢。 钢型材，导致早期屈服发生。在火灾事件中，受约束的钢梁会迅速升温， 对支柱产生侧向推力。柱子很可能因为这种推力而断裂， 这是因为温度升高。 目的：拟议的研究旨在检查和评估，在火灾条件下， 现有的HSS到HSS延伸端板弯矩连接，并致力于引入新的连接 能够吸收或改变横向推力的方向。 科学方法：使用中型和全尺寸实验， 将评估火灾条件下HSS对HSS延长端板弯矩连接。拟议 研究的重点是如何利用火灾中的悬链线作用，以提高 约束钢梁采用ABAQUS有限元模型分析了热-热耦合效应， 结构性能设计火灾（适用于商业和工业类型的职业）以及标准火灾 时间-温度曲线将应用于使用卡尔顿新建的消防设施的连接 大学的。 这项研究有望促进对常用钢材火灾行为的理解 连接（而不是孤立的连接），并提出了一种先进的连接，可以提高稳定性， 火灾事件。本文的研究成果将为梁柱结构的抗火设计提供参考 连接.