Collaborative Research: Structural Mechanics of Steel Columns and Beam-Columns Under Fire Loading

目前的研究成果表明，钢结构在实际火灾荷载作用下的稳定性(倒塌潜力)取决于钢柱和梁柱的性能。本项目的总体目标是发展知识(以实验数据和数值模型的形式)，了解钢柱和梁柱在结构荷载和考虑结构约束的实际火灾荷载效应下的基本行为和稳定性。试验研究将集中于测量钢梁柱和柱在重力和横向荷载、高温分布和温度梯度以及转角端部约束下的基本性能。将开发和校准分析模型，以模拟所测量的样品的基本行为。它们将被进一步用于：(1)进行参数研究，(2)制定基于性能的设计条款，以及(3)模拟和预测大型建筑结构的真实火灾行为。实验和分析调查将分别由普渡大学和SDSM&amp；T的PI领导。这项研究满足了美国国家标准与技术研究所(NIST)建筑火灾研究实验室(BFRL)在世贸中心倒塌后确定的一个关键需求，即开发和验证必要的测试方法、分析工具和指南，以评估结构部件和整个系统的基本性能和防火性能。这将有助于：(1)制定以性能为基础的设计条款，以保护公共财产和生命；(2)更好地预测建筑物在实际火灾事件中的性能和稳定性。案例研究和课程单元的开发将通过在伙伴学校实施和在国家会议上传播，对本科生、研究生和从业人员教育产生影响。

Current research findings indicate that the stability (collapse potential) of steel building structures subjected to realistic fire loading is governed by the behavior of steel columns and beam-columns. The overall goal of this project is to develop knowledge (in the form of experimental data and numerical models) of the fundamental behavior and stability of steel columns and beam-columns under structural loads and realistic fire loading effects with consideration of structural restraints. The experimental investigations will focus on measuring the fundamental behavior of steel beam-columns and columns under combined gravity and lateral loads, elevated temperature distributions and thermal gradients, and rotational end restraints. Analytical models will be developed and calibrated to model the measured fundamental behavior of the specimens. They will be used further to: (1) conduct parametric studies, (2) develop performance-based design provisions, and (3) to model and predict the realistic fire behavior of large-scale building structures. The experimental and analytical investigations will be led by the PIs from Purdue University and SDSM&T, respectively.The study meets a critical need identified by the National Institute of Standards and Technology (NIST) Building Fire Research Laboratory (BFRL) in the aftermath of the World Trade Center collapse, which is to develop and validate test methods, analytical tools, and guidelines necessary to evaluate the fundamental behavior and fire performance of structural components and the system as a whole. This will facilitate: (1) the development of performance-based design provisions to protect public property and life, and (2) better prediction of the performance and stability of buildings subjected to realistic fire events. Development of case studies and course modules will impact undergraduate, graduate and practitioner education through implementation at the partner schools and dissemination at national meetings.