Numerical modelling of stainless steel preloaded bolted connections

Petr Hradil, Anqi Chen, Nancy Baddoo

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    The use of stainless steel in construction has become more popular in recent years. It is used for a wide range of structural applications in aggressive environments where reliable performance over long periods with little maintenance is required. Although structural design standards are available for stainless steel, currently there are no rules covering the design of preloaded slip-resistant bolted connections because of the lack of knowledge about their long-term viscoplastic behaviour. Viscoplastic creep and stress relaxation in the preloaded bolt assemblies will lead to a certain loss of clamping force and may cause the failure of the connection if not accounted for. This paper presents the development of material models and finite element models for bolt assemblies based on an extensive experimental study of creep, relaxation and tension effects on austenitic, ferritic, duplex and lean duplex steel plates and bars for different loading rates. These models were verified against slip tests with stainless steel bolt assemblies according to EN 1090-2 and then used in a parametric study to extend the scope of the connections investigated. Both experimental programmes were carried out in the European RFCS research project SIROCO (Execution and reliability of slip-resistant connections for steel structures using Carbon Steel and Stainless Steel) as well as finite element calculations.

    Original languageEnglish
    Pages (from-to)344-353
    JournalSteel Construction: Design and Research
    Volume10
    Issue number4
    DOIs
    Publication statusPublished - 1 Jan 2017
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Stainless Steel
    Bolts
    Stainless steel
    Creep
    Steel
    Stress relaxation
    Steel structures
    Structural design
    Carbon steel

    Keywords

    • Abaqus
    • bolts
    • creep
    • finite element analysis
    • preloading
    • relaxation
    • slip-resistant connections
    • stainless steel
    • viscoplasticity

    Cite this

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    abstract = "The use of stainless steel in construction has become more popular in recent years. It is used for a wide range of structural applications in aggressive environments where reliable performance over long periods with little maintenance is required. Although structural design standards are available for stainless steel, currently there are no rules covering the design of preloaded slip-resistant bolted connections because of the lack of knowledge about their long-term viscoplastic behaviour. Viscoplastic creep and stress relaxation in the preloaded bolt assemblies will lead to a certain loss of clamping force and may cause the failure of the connection if not accounted for. This paper presents the development of material models and finite element models for bolt assemblies based on an extensive experimental study of creep, relaxation and tension effects on austenitic, ferritic, duplex and lean duplex steel plates and bars for different loading rates. These models were verified against slip tests with stainless steel bolt assemblies according to EN 1090-2 and then used in a parametric study to extend the scope of the connections investigated. Both experimental programmes were carried out in the European RFCS research project SIROCO (Execution and reliability of slip-resistant connections for steel structures using Carbon Steel and Stainless Steel) as well as finite element calculations.",
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    Numerical modelling of stainless steel preloaded bolted connections. / Hradil, Petr; Chen, Anqi; Baddoo, Nancy.

    In: Steel Construction: Design and Research, Vol. 10, No. 4, 01.01.2017, p. 344-353.

    Research output: Contribution to journalArticleScientificpeer-review

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