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Evaluation of Ultimate Strength of Square Hollow Section Under Elevated Temperatures With Varying Slenderness Ratios and Width-to-thickness Ratios

Year: 2026

Type: article

Abstract: Detailed FEM models employing shell elements were developed to evaluate the ultimate strength of square hollow steel columns with varying slenderness ratios and width-to-thickness ratios under elevated temperatures. The analyses considered plasticity, flexural buckling, and local buckling of the columns. It was quantitatively demonstrated that even columns with relatively small width-to-thickness ratios undergo local buckling at high temperatures. Furthermore, by focusing on fiber stresses in the column cross-section, the ultimate axial strength was evaluated using the tangent modulus theory. In addition, the ultimate strength under combined axial force and uniform bending at elevated temperatures was assessed.

Source: Journal of Structural and Construction Engineering (Transactions of AIJ)

DOI: 10.3130/aijs.91.578

Authors: Kumpei AZAI, Jiro TAKAGI

Institution: Tokyo Metropolitan University

Language: English

Topic: Structural Load-Bearing Analysis

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

OpenAlex ID: W7147077371

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