带腹板穿孔和板条增强的腹板加筋冷弯型钢槽钢截面压缩构件的试验和数值模拟

IF 6.4 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-02-12 DOI:10.1016/j.engstruct.2025.119836

Jia-Hui Zhang , Jiaxin Wang , Shuluan Xu , Xinyun Sun , Fangying Wang

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引用次数: 0

摘要

本文研究了不同腹板加劲筋配置的c截面柱的孔洞对承载力的影响，并提出了有效的结构措施来减轻孔洞造成的承载力损失。首先，对平面腹板、v型腹板加筋和弓形腹板加筋的通道截面进行了试验试验。试件包括未穿孔柱作为对照组、穿孔柱和用板条板加固的穿孔柱。随后，根据实验结果进行了有限元建模和参数化分析。试验和有限元分析结果表明，平腹板c型柱的承载力下降幅度最小，而v型腹板加筋c型柱的刚度下降幅度最大，穿孔后的承载力下降幅度达32.3% %，有限元分析结果为35.9% %。当采用板条板提供横向支撑时，弓形腹板加筋c型钢的扭曲屈曲得到抑制，承载能力大幅提高，试验结果为50.9% %，有限元分析结果为74.3% %。承载力评价结果表明，直接强度法对平腹板c截面柱具有保守性和可靠性，但对加劲腹板c截面柱具有非保守性和可靠性差的特点。最后，引入穿孔强度折减系数，直接计算穿孔c截面柱的承载力，提供更可靠、分散性更小的计算值。同样，提出的板条板强度增强系数可用于直接计算开孔腹板加筋c截面柱的承载力，计算结果准确、一致、可靠。

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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Testing and numerical modelling of web-stiffened cold-formed steel channel section compression members with web perforations and batten reinforcements

This study investigates the impact of perforations on the load-bearing capacity of C-section columns with different web stiffener configurations and proposes effective structural measures to mitigate capacity loss due to perforations. First, experimental tests were conducted on channel sections with a flat web, a V-shaped web stiffener, and a bow-shaped web stiffener. The specimens included unperforated columns as the control group, perforated columns, and perforated columns reinforced with batten panels. Subsequently, finite element modeling and parametric analysis were carried out based on the experimental results. Analysis of the experimental and finite element results indicates that flat-web C-section columns experience the least reduction in load-bearing capacity, while V-shaped web-stiffened C-section columns show significant stiffness degradation and the greatest reduction in load-bearing capacity after perforation, with reductions of up to 32.3 % in the tests and 35.9 % in FEA. When transverse support is provided by batten panels, the distortional buckling of bow-shaped web-stiffened C-sections is suppressed, resulting in a substantial increase in load-bearing capacity, up to 50.9 % in the tests and 74.3 % in FEA. The load capacity evaluation reveals that the Direct Strength Method is conservative and reliable for flat-web C-section columns but tends to be non-conservative and less reliable for C-section columns with web stiffeners. Finally, this study introduces the perforation strength reduction factor to directly calculate the load-bearing capacity of perforated C-section columns, providing more reliable and less dispersed calculation values. Similarly, the strength enhancement factor proposed for batten panels can be used to directly calculate the load-bearing capacity of perforated, web-stiffened C-section columns, offering accurate, consistent, and reliable calculation results.

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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.