Dependable Performance of Steel Structures in Fire with Case Studies

机译：火灾案例中钢结构的可靠性能

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This paper describes the application of a structural fire model, known as the Slab Panel Method (SPM), developed by the New Zealand Heavy Engineering Research Association (HERA) in conjunction with the University of Canterbury. The SPM accounts for the inelastic reserve of strength available from composite steel/concrete floor systems due to their two way deformation under fully developed fire conditions. The outcome of the performance based design process is a steel structure with fire proofing only to some of the steel beams supporting the floor. Structural elements which are critical for stability are protected with fire proofing materials, while the floor beams for which fire proofing is not necessary for structural stability or integrity are designed without this passive fire protection. This provides a structure which will remain stable for the expected temperatures and associated mechanical properties.rnRecent project examples where the SPM has been successfully used in New Zealand are reviewed. These include a 20 story 350,000 sq ft. office building and a 12 story 360,000 sq ft. mixed use office and apartment building, both under construction in New Zealand. Validation of one of the design solutions using finite element analysis to assess the actual performance for the range of structural fire severity expected is described.rnThe paper concludes that design methods are maturing to a level where a dependable and robust performance can be predicted using the SPM, so that those parts of the structure which require fire proofing can be specified with enough protection to maintain structural stability, and those parts which do not need this passive fire protection can be safely constructed without fire protection. Opportunities for thernapplication of SPM in the North American regulatory environment are discussed.

机译：本文介绍了由新西兰重型工程研究协会（HERA）与坎特伯雷大学联合开发的结构火灾模型（称为平板面板方法（SPM））的应用。 SPM解释了复合钢/混凝土楼板系统在充分发展的火灾条件下由于双向变形而无法获得的强度储备。基于性能的设计过程的结果是仅对支撑地板的部分钢梁进行防火处理的钢结构。对于稳定性至关重要的结构元件，要用防火材料进行保护，而对于这种结构稳定或整体性而言，不需要防火的地板梁则没有这种被动防火措施。这提供了一种在预期温度和相关机械性能下保持稳定的结构。回顾了最近在新西兰成功使用SPM的项目示例。其中包括20层350,000平方英尺的办公楼和12层360,000平方英尺的多功能办公楼和公寓楼，均在新西兰建造。描述了一种设计解决方案的验证，该设计解决方案使用有限元分析来评估预期的结构火灾严重性范围内的实际性能。本文得出结论，认为设计方法已经成熟到可以使用SPM预测可靠和鲁棒性能的水平。，因此可以为结构中需要防火的部分指定足够的保护以维持结构稳定性，而不需要这种被动防火的那些部分可以在没有防火的情况下安全地构造。讨论了在北美监管环境中应用SPM的机会。

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来源
《SEAOC 2008 convention proceedings》|2008年|223-238|共6页
会议地点 Big Island HI(US)
作者
Stuart Oliver; Martin Feeney; Bevan Jones;
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作者单位

CPEng(NZ) Holmes Fire Safety Auckland, New Zealand;

CPEng(NZ) Holmes Fire Safety Auckland, New Zealand;

Holmes Culley San Francisco, California;

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原文格式 PDF
正文语种 eng
中图分类建筑结构;
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1. Performance-Based Structural Fire Engineering of Steel Building Structures: Design-Basis Compartment Fires [J] . Fischer Erica C., Varma Amit H., Agarwal Anil Journal of structural engineering . 2019,第9期

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2. Performance-Based Structural Fire Engineering of Steel Building Structures: Design-Basis Compartment Fires [J] . Fischer Erica C., Varma Amit H., Agarwal Anil Journal of structural engineering . 2019,第9期

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机译：海上顶部钢结构在局部火灾中使用防火保护的研究
4. Dependable Performance of Steel Structures in Fire with Case Studies [C] . SEAOC convention . 2008

机译：用案例研究，钢结构在火中的可靠性性能
5. Performance of steel structures subjected to fire following earthquake [D] . Memari, Mehrdad 2016

机译：地震后遭受火灾的钢结构的性能
6. Experimental Study on the Fire Performance of Tubular Steel Columns with Membrane Protections for Prefabricated and Modular Steel Construction [O] . Xin Zhang, Lei Peng, Zhao-peng Ni, 2018

机译：预制和模块化钢结构膜保护管状钢管柱耐火性能试验研究。
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

Dependable Performance of Steel Structures in Fire with Case Studies

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