An Experimental Study on the Behaviour of Full-Scale Composite Steel Frames under Furnace Loading
An Experimental Study on the Behaviour of Full-Scale Composite Steel Frames under Furnace Loading
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发表时间：
2008
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通讯作者：
Y. Dong;K. Prasad
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作者：
Y. Dong;K. Prasad
近年来，随着美国One Meridian Square、委内瑞拉中央公园东塔、美国世界贸易中心和西班牙温莎塔等高层建筑相继发生火灾，人们对火灾荷载作用下高层建筑结构安全性的研究又重新燃起了兴趣。为了分析和理解此类事件，研究人员专注于开发数值模型来分析火灾荷载下孤立钢构件的行为，并在较小程度上分析全尺寸钢结构的行为。然而，尽管扩散的数值模型，物理测试仍然是重要的，在发展新的理解，也作为一个数据库，验证的数值模型。由于无法研究由于相邻构件之间的相互作用以及连接件的作用而发生的结构行为的许多方面，因此对单个孤立结构元件进行物理测试提供的数据有限。由于结构的连续性和构件之间的相互作用，真实的结构在火灾下的性能往往比标准试验预测的要好得多。此外，根据现行设计规范进行的测试仅使结构元件经历升温阶段，而不考虑冷却阶段，在冷却阶段期间可能发生结构的局部/整体失效。
In view of recent large fires in tall buildings, such as One Meridian Square (USA), East Tower Central Park (Venezuela), World Trade Center (USA) and Windsor Tower (Spain), there has been a renewed interest in understanding the structural safety of tall buildings under fire loading. To analyze and understand such events, researchers have focused on the development of numerical models to analyze the behavior of isolated steel members and to a lesser extent, full scale steel structures under fire loading. However, despite the proliferation of numerical models, physical testing continues to be important in developing new understanding and also to serve as a database for validation of the numerical models. Physical testing on single isolated structural elements provide limited data because many aspects of structural behavior that occur due to the interaction between adjacent members as well as the role of connections cannot be studied. Performance of real structures subject to fires is often much better than that predicted from standard tests due to structural continuity and the interaction between members. In addition, tests performed under the current design codes subject the structural element to a heat up phase only and do not consider the cool down phase during which local / global failure of the structure may occur.