Research Progress on Material Properties and Residual Stress Distribution of Hot-Rolled Heavy H-Section Steel

Résumé fourni par la source

Hot-rolled heavy H-section steel is defined as hot-rolled H-section steel with a weight per meter not less than 3000 N or a flange thickness not less than 40 mm. This paper reviews the research findings on material properties and residual stress of hot-rolled heavy H-section steel， conducts a comparative analysis of experimental data in accordance with current Chinese codes， and provides some design and application recommendations. The material properties of hot-rolled heavy H-section steel exhibit variability at different cross-sectional locations， and fluctuations in material properties are observed along the thickness direction at the same cross-sectional position. The material property data obtained from sampling based on current Chinese codes can effectively reflect the average material properties of the cross-section of hot-rolled heavy H-section steel. The residual stress distribution in hot-rolled heavy H-section steel differs from that of ordinary hot-rolled H-section steel， showing parabolic or multi-curve patterns in the flange and web regions， with significant variations in residual stress values along the thickness direction at the same location. The residual stress distribution model for hot-rolled H-section steel used in current Chinese codes to determine column stability curves exhibits discrepancies compared to the actual residual stress distribution of hot-rolled heavy H-section steel obtained from the existing research， which may lead to conservative design results.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.