O.I.C.-based design of steel rectangular hollow sections at high temperatures

IF 3.3 3区工程技术 Q2 ENGINEERING, CIVIL

Fire Safety Journal Pub Date : 2025-08-21 DOI:10.1016/j.firesaf.2025.104504

Mina Aleseyedan , Pablo Rico , Mariana Echeverri , Nicolas Boissonnade

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引用次数: 0

Abstract

This paper investigates the fire resistance of hot-rolled rectangular and square hollow sections at the cross-sectional level. Advanced non-linear Finite Element models are developed and validated against 17 well-documented tests, covering Class 2 (plastic) and Class 4 (slender) tube sections under combined compression and bending from 20 °C to 700 °C. The strong correlation between numerical and experimental results confirms the accuracy of these models, which are then used to analyze cross-sectional fire behavior and resistance. Over 1400 non-linear simulations assess the influence of cross-sectional geometry, temperature, and loading conditions.

A novel design approach based on the Overall Interaction Concept (O.I.C.) is introduced, offering a simplified yet highly accurate method for design verification. Compared to Eurocode 3, A.I.S.C., and C.S.A.-S16 standards, which tend to be either overly conservative or unsafe, the O.I.C. method provides superior precision and reliability. Reliability analyses further demonstrate that the O.I.C. approach meets and exceeds the required safety levels, making it a more effective alternative for fire-resistant structural design.

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高温条件下矩形钢空心截面o.i.c.设计

本文研究了热轧矩形和方形空心型材在横截面上的耐火性能。先进的非线性有限元模型开发并验证了17个有据可依的测试，涵盖了2级（塑料）和4级（细长）管段，在20°C至700°C的组合压缩和弯曲下。数值和实验结果之间的强相关性证实了这些模型的准确性，然后将其用于分析截面火灾行为和阻力。超过1400个非线性模拟评估了截面几何形状、温度和加载条件的影响。提出了一种基于整体交互概念（oic）的新型设计方法，为设计验证提供了一种简化而高精度的方法。与Eurocode 3、A.I.S.C和c.s.a - s16标准相比，o.i.c方法提供了更高的精度和可靠性，这些标准往往过于保守或不安全。可靠性分析进一步表明，oic方法满足并超过了要求的安全水平，使其成为防火结构设计的更有效的替代方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fire Safety Journal 工程技术-材料科学：综合

CiteScore

5.70

自引率

9.70%

发文量

153

审稿时长

60 days

期刊介绍： Fire Safety Journal is the leading publication dealing with all aspects of fire safety engineering. Its scope is purposefully wide, as it is deemed important to encourage papers from all sources within this multidisciplinary subject, thus providing a forum for its further development as a distinct engineering discipline. This is an essential step towards gaining a status equal to that enjoyed by the other engineering disciplines.