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Design procedures and guidelines for a novel self-centring concentrically braced steel frame based on displacement-based design approach

Alwahsh, Hatim
; 
Salawdeh, Suhaib
; 
Jiang, Yadong
; 
Goggins, Jamie
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Identifiers
https://hdl.handle.net/10379/18677
 https://doi.org/10.13025/29471
Publication Date
2024-08-29
Keywords
Self-centring, residual drift, direct displacement-based design, performance-based design, CBF, PT
Type
conference paper
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Citation
Alwahsh, Hatim, Salawdeh, Suhaib, Jiang, Yadong, & Goggins, Jamie. (2024). Design procedures and guidelines for a novel self-centring concentrically braced steel frame based on displacement-based design approach. Paper presented at the Civil Engineering Research in Ireland (CERI 2024) conference, Galway, 29-30 August.
Abstract
The introduction of the self-centring steel concentrically braced frame (SC-CBF) provides an innovative structural solution to seismic regions. Developed at the University of Galway, this innovative system possesses the unique ability to independently return to its original position after experiencing lateral deformation during an earthquake. Despite its significant benefits, it is noted that the lack of established guidelines in design codes, indicates that the development of the SC-CBF system is still in its preliminary phases.This article presents a Direct Displacement-Based Design (DDBD) methodology to design SCCBFs. Flowcharts for conducting DDBD of the SC-CBF system are produced. The flowcharts offer a detailed set of steps to create user-friendly guidelines for constructing earthquake-resistant structures equipped with self-centring capabilities. This paper also encompasses a thorough analysis of a specific case study that revolves around a four-storey structure. This case study provides an in-depth evaluation of the design procedures, effectively demonstrating the tangible implementation of the methodology. The target displacement of the SC-CBF system at a 2.5% drift ratio resulted in a total base shear of 1382.6 KN after five analysis iterations. The SC-CBF system exhibits an effective period of 2.37 seconds and an equivalent viscous damping of 8.6 %. This comprehensive analysis will provide a deeper understanding of the design process for the SC-CBF system.
Funder
Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe
Science Foundation Ireland
MaREI Centre
Marine Institute
Publisher
Civil Engineering Research Association of Ireland
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Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
cbn
Collections
Civil Engineering (Conference Papers)