Creep Buckling of Steel Columns Subjected to Fire

本研究的目的是发展的方法来解释材料蠕变的影响，在建筑物中的结构钢柱的屈曲受到火灾。研究方法包括结构钢的蠕变实验和钢柱蠕变屈曲实验，用于结构火灾工程应用中感兴趣的应力和温度状态，蠕变屈曲的分析和计算模型的开发，以及适用于设计实践的蠕变屈曲预测方程的开发。实验研究将集中在ASTM A992钢，这是美国建筑施工中使用的最常见的结构钢等级，并且几乎没有高温数据。该奖项的获奖项目包括结构钢柱高温实验数据库;评估钢柱火灾安全性的分析和设计模型;结构工程专业学生建筑物防火性能的教育;以及对消防员进行结构防火安全方面的教育。柱是建筑结构安全的关键要素，并且柱在火灾中的失效可导致倒塌和生命损失。研究结果将为钢结构建筑柱在火灾下的安全性评估提供重要的工具，并将有助于改进建筑物的结构防火安全设计实践。研究生和本科生将受益于参与研究，并从结构防火工程课程的增强。消防队员将受益于这一奖项，从培训提供的安全和倒塌风险的结构受到火灾。

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.