支撑处部分深度加劲梁的剪切屈曲行为

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-10-29 DOI:10.1016/j.tws.2024.112622

Gábor Hajdú , Hartmut Pasternak

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引用次数: 0

摘要

本文介绍了不同端柱结构板梁的试验结果和数值模拟结果。虽然EN 1993-1-5:2024提供了刚性和非刚性端柱的设计规则，但它没有解决部分加劲腹板的抗剪能力。由于缺乏对其力学行为的彻底调查，部分深度加强筋的使用面临风险。为了探讨这一问题，采用先进的数值模拟方法，对不同腹板长细比的梁进行了小数量实验试验和大数量参数化研究。结果表明，当腹板加劲高度为腹板高度的50%时，梁的抗剪屈曲能力低于设计推荐值。对于全高加劲梁，EN 1993-1-5:2024给出了安全结果。对en1993 -1-5:2024部分加劲梁设计规范的精度进行了评价，并对部分加劲梁提出了新的抗剪屈曲设计曲线。

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Shear buckling behaviour of beams with partial-depth stiffeners at the support

This paper presents the findings from experimental tests and numerical simulations on plate girders with various end post configurations. While EN 1993-1-5:2024 provides design rules for both rigid and non-rigid end posts, it does not address the shear resistance of partially stiffened webs. The use of partial-depth stiffeners faces risks due to the lack of thorough investigation into their mechanical behaviour. To explore this issue, small numbered experimental tests and large numbered parametric studies on beams with different web slenderness were conducted using advanced numerical simulations. The results indicated that the shear buckling capacity of girders is lower than the design recommendation when the web stiffener height is <50 % of the web height. For girders with full-height stiffeners, EN 1993-1-5:2024 yields safe results. The accuracy of the EN 1993-1-5:2024 design rule for partially stiffened beams was also evaluated and new and shear buckling design curves were proposed for girders with partial-depth stiffeners.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.