Extension of the Continuous Strength Method to the design of steel I-sections in fire

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2024-11-28 DOI:10.1016/j.engstruct.2024.119339

Merih Kucukler

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Abstract

This paper presents an investigation into the extension of the Continuous Strength Method (CSM) to the design of steel I-sections at elevated temperatures. Structural response of 21375 high strength and normal strength steel I-sections at elevated temperatures is considered, taking into account a very broad range of cross-section geometries and cross-section slendernesses as well as different elevated temperature levels and steel grades which include both high strength S690 and S460 steel grades and normal strength S355, S275 and S235 steel grades. The implementation of the CSM for the fire design of steel I-sections is set out. The accuracy of the CSM against that of the provisions of the European structural steel fire design standard EN 1993-1-2 and its upcoming version prEN 1993-1-2 for the ultimate resistance predictions of steel I-sections at elevated temperatures is assessed. It is shown that in comparison to the elevated temperature cross-section design provisions of EN 1993-1-2 and prEN 1993-1-2, the CSM leads to a significantly improved level of accuracy and consistency in the ultimate strength predictions of steel I-sections at elevated temperatures.

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将连续强度法扩展至火灾中的钢 I 型截面设计

本文介绍了将连续强度法（CSM）扩展到高温下钢制工字截面设计的研究。考虑到截面几何形状和截面细长度的广泛范围，以及不同的高温水平和钢材等级（包括高强度 S690 和 S460 钢材等级以及普通强度 S355、S275 和 S235 钢材等级），研究了 21375 高强度和普通强度工字钢在高温下的结构响应。本文阐述了如何在工字钢的防火设计中采用 CSM。对照欧洲钢结构防火设计标准 EN 1993-1-2 及其即将推出的版本 prEN 1993-1-2，评估了 CSM 在高温条件下预测钢 I 型截面极限抗力的准确性。结果表明，与 EN 1993-1-2 和 prEN 1993-1-2 中的高温截面设计规定相比，CSM 可显著提高高温下钢制 I 型截面极限强度预测的准确性和一致性。

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.