Behaviour and design resistance of long bolts in tension

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research Pub Date : 2025-03-10 DOI:10.1016/j.jcsr.2025.109492

Neda Janković , Filip Ljubinković , Jorge Conde , Jordi Costa , Luís Simões da Silva

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Abstract

Long bolts, also known as bi-directional bolts, have multiple applications in structural engineering, particularly as an instrumental part of the adaptability and reusability of steel members. Despite that, the long bolt design is not properly covered by current standards. This paper describes an experimental and analytical study to characterize the long bolts in tension for their inclusion in the component method precluded by Eurocode 3. The study is part of a wider campaign (including the behaviour in shear, preloading, and relaxation of the bolts) developed in the framework of the European Research Project CONNECT4C. The study shows that the current design expressions for bolt resistance and stiffness can be used for long bolts in tension, regardless of bolt material or finishing surface. A bolt material model is proposed for possible inclusion in steel design standards. Finally, it is also recommended to adopt double nuts in long bolts to avoid premature thread stripping.

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来源期刊

Journal of Constructional Steel Research 工程技术-工程：土木

CiteScore

7.90

自引率

19.50%

发文量

550

审稿时长

46 days

期刊介绍： The Journal of Constructional Steel Research provides an international forum for the presentation and discussion of the latest developments in structural steel research and their applications. It is aimed not only at researchers but also at those likely to be most affected by research results, i.e. designers and fabricators. Original papers of a high standard dealing with all aspects of steel research including theoretical and experimental research on elements, assemblages, connection and material properties are considered for publication.