Experimental and numerical exploration for the design of swift-constructed demountable blind bolts

Xiao Zhou Han, Chen Wang, Tak Ming Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

In this study, a new type of blind bolt that combines high tensile resistance and stiffness with easy and fast installation and demounting capabilities is proposed, named Swift-Constructed Demountable Blind Bolt (SCDBB). The components, intended working mechanism, and fabrication process are first introduced. Geometric constraints of critical components are then derived based on the desired behaviour. To study the performance of SCDBBs under tensile loading and their behaviour during the installation process, 9 experimental tests were conducted. Two failure modes, namely, bolt shank fracture and buckling of the expansion nut blades, were revealed when subjected to maximum tensile loading. Subsequently, finite element (FE) models were developed and validated by comparing the numerical results with the experimental data. To further explore the impact of key design parameters on the behaviour of the bolts under tensile loading and performance during installation, parametric studies consisting of 106 FE models were conducted for bolts of three sizes with variations in four key design parameters. The findings indicate that the failure modes under maximum tensile loading and maximum installation force are sensitive to the length, thickness, and gap of the elastic expansion nut. The optimised ranges for each design parameter were identified to prevent undesirable blade buckling.

Original languageEnglish
Article number108335
JournalJournal of Constructional Steel Research
Volume214
DOIs
Publication statusPublished - Mar 2024

Keywords

  • Blind bolt
  • Demountable
  • Fast installation
  • Fast removal
  • High-strength bolt

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Metals and Alloys

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