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Abstract

This paper introduced the design methods for the stability of struts in Chinese and European specifications for steel structure bridges, and compared and analyzed the differences and similarities between the section classification, overall stability curve, and local stability curve in relevant Chinese and European specifications. By taking H-shaped steel components as an example, it calculated the strut stability and compared the results with finite element calculations. The results show that in terms of section classification, JTG D64-2015 is divided into five categories (S1, S2, S3, S4, and S5), while EC3 is divided into four categories (1, 2, 3, 4), with the corresponding relationship of mechanical performance being 1-a, 2-b, 3,4-c, and 5-d. Additionally, for the overall stability curve, when the slenderness ratio λn is no more than 1.5, the coefficient of stability corresponding to the c/d curve in JTG D64-2015 is 2%-5% lower than that of EC3. When λn is more than 1.5, the coefficients of stability corresponding to the Chinese and European specifications are basically the same. In terms of local stability, JTG D64-2015 only utilizes effective cross-sectional area calculation for the web plate, while EC3 has different calculation formulas for the flange and web plate. The comparative analysis of Chinese and European specifications and finite element calculation results shows that both the specifications underestimate the ultimate bearing capacity of struts, with the results obtained by Chinese and European specifications being 3%-13% and 1%-12% lower respectively in most cases. Relatively speaking, JTG D64-2015 in Chinese specifications is more conservative in terms of stable design.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.045

First Page

284

Last Page

289

Submission Date

March 2025

Reference

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