焊接方形高强钢箱形截面柱的局部和整体相互作用屈曲缺陷

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Periodica Polytechnica-Civil Engineering Pub Date : 2023-07-17 DOI:10.3311/ppci.22226

M. Radwan, B. Kövesdi

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引用次数: 0

摘要

高强钢箱形截面柱的局部和整体屈曲模态相互作用行为一直受到较少的研究。目前，在非线性塑性分析中缺乏有效的等效几何缺陷来估计相互作用的屈曲抗力。本研究旨在寻找可用于几何和材料非线性分析的等效几何缺陷，利用缺陷(GMNIA)来估计高强钢方形焊接箱形截面柱的相互作用屈曲抗力。它扩展了先前作者对标准强度钢焊接箱形截面等效缺陷的研究。开发和验证的数值模型用于进行参数研究，以使用先前开发和验证的缺陷和残余应力组合来估计准确的屈曲能力。准确的屈曲能力用于标定等效的局部和全局缺陷组合，可用于基于有限元的设计。可靠性评估研究也进行了检查提出的不完善组合的安全水平。

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Imperfections for Local and Global Interaction Buckling of Welded Square High-strength Steel Box-section Columns

The interaction behavior between local and global buckling modes in high-strength steel box-section columns has received limited research attention. Currently, there is a lack of a validated equivalent geometric imperfection that can be effectively employed in nonlinear plastic analysis to estimate the interaction buckling resistance. This research aims to find equivalent geometric imperfections that can be used in geometrical and materially nonlinear analysis using imperfections (GMNIA) to estimate the interaction buckling resistance of square welded box-section columns made of high-strength steel. It extends prior investigations by the authors on equivalent imperfections for normal-strength steel welded box-sections. A developed and validated numerical model is used to perform parametric studies to estimate the accurate buckling capacity using previously developed and verified combinations of imperfections and residual stresses. The accurate buckling capacities are used to calibrate equivalent local and global imperfection combinations that can be used in FEM-based design. A reliability assessment study is also performed to check the safety level of the proposed imperfection combinations.

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来源期刊

Periodica Polytechnica-Civil Engineering 工程技术-工程：土木

CiteScore

3.40

自引率

16.70%

发文量

审稿时长

12 months

期刊介绍： Periodica Polytechnica Civil Engineering is a peer reviewed scientific journal published by the Faculty of Civil Engineering of the Budapest University of Technology and Economics. It was founded in 1957. Publication frequency: quarterly. Periodica Polytechnica Civil Engineering publishes both research and application oriented papers, in the area of civil engineering. The main scope of the journal is to publish original research articles in the wide field of civil engineering, including geodesy and surveying, construction materials and engineering geology, photogrammetry and geoinformatics, geotechnics, structural engineering, architectural engineering, structural mechanics, highway and railway engineering, hydraulic and water resources engineering, sanitary and environmental engineering, engineering optimisation and history of civil engineering. The journal is abstracted by several international databases, see the main page.