Creep Buckling of Steel Columns Subjected to Fire

受火钢柱的蠕变屈曲

• 批准号: 0927819
• 负责人: Michael Engelhardt
• 金额: $ 26.97万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0927819&HistoricalAwards=false
• 关键词: Creep; Buckling; Steel; Columns; Subjected

The objective of this research is to develop methods to account for the effects of material creep on the buckling of structural steel columns in buildings subjected to fire. The research approach includes experiments on creep of structural steel and experiments on creep buckling of steel columns for stress and temperature regimes of interest in structural-fire engineering applications, development of analytical and computational models for creep buckling, and the development of predictive equations for creep buckling suitable for use in design practice. The experimental studies will focus on ASTM A992 steel, which is the most common grade of structural steel used in building construction in the US, and for which very little elevated temperature data exists. Deliverables for this award include a database of elevated temperature experiments on structural steel columns; analytical and design models for evaluating safety of steel columns subjected to fire; education of structural engineering students on fire performance of buildings; and education of fire fighters on structural-fire safety.Columns are elements critical to the safety of building structures, and failure of a column in a fire can lead to collapse and loss of life. The results of this research will provide an important tool for evaluating the safety of steel building columns subjected to fire, and will contribute to improved practices for structural-fire safety design of buildings. Graduate and undergraduate students will benefit from involvement in the research and from the enhancement of courses on structural-fire engineering. Fire fighters will benefit from this award from training provided on the safety and collapse risk of structures subjected to fire.

这项研究的目的是开发方法来说明材料蠕变对受到火灾的建筑物中结构钢柱屈曲的影响。该研究方法包括有关结构钢蠕变的实验和实验钢柱的蠕变屈曲，以进行结构性火灾工程应用中感兴趣的压力和温度状态，开发用于蠕变屈曲的分析和计算模型以及适用于用于设计实践的蠕变屈曲的预测方程。实验研究将集中于ASTM A992钢，这是美国建筑构建中最常见的结构钢等级，对于它的温度数据升高很少。该奖项的可交付成果包括在结构钢柱上进行升高温度实验的数据库；分析和设计模型，用于评估钢柱的安全性；对建筑物的火灾表现的结构工程专业学生的教育；对消防员对结构性防火安全的教育是对建筑结构安全至关重要的要素，而柱子在火中的失败可能导致崩溃和生命损失。这项研究的结果将为评估受到火灾的钢结构柱的安全性提供重要的工具，并将有助于改进建筑物结构性火灾安全设计的实践。研究生和本科生将受益于参与研究的参与以及增强结构性火灾工程课程。消防员将从该奖项中受益于有关遭受火灾的结构的安全和崩溃风险的培训。