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Experimental behaviour of non-seismical RWS connections with perforated beams under cyclic actions

Tsavdaridis, K. D. ORCID: 0000-0001-8349-3979, Lau, C. K. and Alonso-Rodríguez, A. (2021). Experimental behaviour of non-seismical RWS connections with perforated beams under cyclic actions. Journal of Constructional Steel Research, 183, 106756. doi: 10.1016/j.jcsr.2021.106756

Abstract

The use of perforated (in particular cellular and castellated) beams has become widespread as their manufacturing processes keep minimising wasted material and has become cost-effective by reducing self-weight of steel structures, while allowing for larger clear spans. Although their behaviour to time-invariant vertical loads has been extensively investigated and validated in laboratory setups, their response to reversible actions has not been explored to the same extent. This paper presents results of cyclic load tests of beam-column reduced web section (RWS) connections, considering setups representative of what is observed in low-rise buildings in the UK; a region with sparse seismicity. Results show that RWS connections on these frames can achieve stable hysteresis loops without significant strength degradation, due to the simultaneous occurrence of yielding of the critical cross-section and development of a Vierendeel mechanism on the edges of the perforations (web openings). Also, inelastic action is mostly observed within the beam, thus being successful in protecting the beam-column connection. Performance particularly exceeds what is observed for a benchmarking RBS connection styled according to the same underlying assumptions, hinting that RWS connections could be a more suitable solution for structural retrofitting in regions where seismicity is sparse.

Publication Type: Article
Additional Information: © 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/).
Publisher Keywords: RWS connections, Cyclic loads, Seismic retrofitting, Cellular beams, Perforated beams
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Departments: School of Mathematics, Computer Science & Engineering > Engineering > Civil Engineering
Date available in CRO: 03 Nov 2021 14:25
Date deposited: 3 November 2021
Date of acceptance: 11 May 2021
Date of first online publication: 21 May 2021
URI: https://openaccess.city.ac.uk/id/eprint/27008
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