Patch loading resistance of slender plate girders with multiple longitudinal stiffeners

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-02-01 DOI:10.1002/stco.202200047

B. Kövesdi, L. Dunai

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Abstract

There is currently no reliable and simple design method available in international literature for the determination of the patch loading resistance of slender plate girders having multiple longitudinal stiffeners. The current research focuses on the patch loading resistance of girders having multiple longitudinal stiffeners. An advanced numerical model is developed and verified by own laboratory test results. A numerical parametric study is executed to investigate the load‐carrying capacity of girders having typical bridge geometries. Analysing the numerical simulation results, the structural behaviour obtained is classified based on the stiffener stiffness. Effect of the different geometrical parameters on the patch loading resistance is evaluated with special focus on the stiffener stiffness and distance between the longitudinal stiffeners. The failure modes depending on stiffener stiffness are investigated and the local buckling type failure is characterised by minimum stiffness. For this specific failure mode, an improved design method is developed, giving reliable resistance within the analysed parameter range. The presented resistance model is consistent with the design philosophy of EN 1993‐1‐5. The applicability of the improved design equation has been investigated for multiple stiffener places in unequal distances, which is the common case in praxis, and for bending and transverse force (M–F) interaction.

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多纵加劲细长板梁的局部荷载抗力

目前国际文献中还没有可靠、简单的设计方法来确定多纵加劲细长板梁的局部荷载抗力。目前的研究主要集中在具有多个纵向加劲肋的梁的局部荷载抗力。建立了先进的数值模型，并通过自己的实验室试验结果进行了验证。对具有典型桥梁几何形状的梁的承载能力进行了数值参数研究。通过对数值模拟结果的分析，根据加劲刚度对结构性能进行了分类。研究了不同几何参数对补强刚度和纵向补强间距的影响。研究了随加劲肋刚度变化的局部屈曲型破坏模式，并以最小刚度为破坏特征。针对这种特殊的失效模式，提出了一种改进的设计方法，在分析的参数范围内给出了可靠的电阻。所提出的阻力模型符合en1993‐1‐5的设计理念。研究了改进设计方程对实际中常见的不等距离的多个加劲肋位置以及弯曲力和横向力相互作用的适用性。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.