Realistic Fire Behavior and Stability of Steel Building Structures and Sub-systems

摘要CMS 0601201将研究钢建筑结构和柱子子系统在实际火灾荷载作用下的基本行为和稳定性（抗破坏性）。 以前的研究没有充分解决这个问题。 它更侧重于对单个构件（柱）和地板子组件进行标准ASTM E119防火测试。 因此，目前的耐火设计规定没有考虑到实际火灾荷载下的整体结构行为和稳定性，并且大多是规定性的NIST调查人员在研究世界贸易中心倒塌后提出的两个主要建议是：（1）开发测试方法、分析工具和指南，以评估建筑结构作为完整系统的防火性能，及（2）制订以性能为本的建筑结构抗火设计规定。 本课题的研究目标是：（1）实验研究非线性系统的基本行为和稳定性（直到破坏）钢柱子系统在结构荷载和实际火灾荷载作用下的性能;（2）开发和验证分析预测钢系统对实际火灾载荷直至失效的响应的（数值）模型;（3）建立分析模型，研究三维建筑结构在使用荷载和真实隔间火灾荷载作用下的整体行为和破坏，同时考虑组成隔间的柱子子系统的复杂行为和破坏。

Abstract CMS 0601201The fundamental behavior and stability (failure resistance) of steel building structures and column subsystems subjected to realistic fire loading will be investigated. Prior research has not addressed this issue adequately. It has focused more on conducting standard ASTM E119 fire tests of individual members (columns) and floor sub-assemblies. As a result, the current fire resistant design provisions do not account for overall structural behavior and stability under realistic fire loading, and are mostly prescriptive Two of the major recommendations made by NIST investigators after studying the World Trade Center collapse are: (1) to develop test methods, analytical tools, and guidelines for evaluating the fire performance of building structures as complete system, and (2) to develop performance-based fire resistant design provisions for building structures. The research objective of this project are (1) To investigate experimentally the fundamental behavior and stability (up to failure) of steel column sub-systems under structural loads and realistic fire loading effects; (2) To develop and validate analytical (numerical) models that predict response of steel systems to realistic fire loading up to failure; (3) To develop analytical models and investigate the overall behavior and failure of 3D building structures subjected to service loads and realistic compartment fire loading, while accounting for the complex behavior and failure of the column sub-systems comprising the compartments.