Publication

Nonlinear time-history analysis of a novel self-centring concentrically braced steel structure

Alwahsh, Hatim
; 
Salawdeh, Suhaib
; 
Jiang, Yadong
; 
Goggins, Jamie
Thumbnail Image
Files
Thumbnail Image
alwahsh_nonlinear_2024.pdf
Adobe PDF, 1.05 MB
Identifiers
https://hdl.handle.net/10379/18675
 https://doi.org/10.13025/29469
Publication Date
2024-08-28
Keywords
Self-centring, Residual drift, Force-based design, Performance-based design, CBF, SC-CBF
Type
conference paper
Downloads
Show all metadata
Citation
Alwahsh, Hatim, Salawdeh, Suhaib, Jiang, Yadong, & Goggins, Jamie. (2024). Nonlinear time-history analysis of a novel self-centring concentrically braced steel structure. Paper presented at the Civil Engineering Research in Ireland (CERI 2024) conference, Galway, 29-30 August.
Abstract
The recent development of self-centring steel concentrically braced frames (SC-CBF) represents a significant advancement in seismic engineering for regions with high earthquake risk. This innovative structural system exhibits the advantageous characteristic of self-centring following a seismic event. This behaviour minimises residual displacements and prevents permanent damage to the non-energy-dissipation components (beams and columns), enhancing its overall resilience. However, it is noteworthy that due to the early stage of SC-CBF technology, established design guidelines for their implementation have not yet been incorporated into current seismic codes. This paper presents research where a force-based design (FBD) procedure was developed and used to design a 4-storey SC-CBF structure. In this procedure, design strengths considered are decided upon the code and drift and residual drift limits. The performance of the designed structure is checked using twelve ground motions with a displacement spectrum matching the design displacement spectra using the non-linear time history analysis (NLTHA). The results indicate a favourable alignment between the design displacements, storey drifts, and residual drifts obtained from the FBD procedure for the case study and those recorded through NLTHA analyses. Furthermore, the residual drift is found to be relatively small in comparison to the design residual drifts. This indicates a successful performance of the self-centring system in achieving its intended goals.
Funder
Seismology and Earthquake Engineering Research Infrastructure Alliance
Science Foundation Ireland
MaREI Centre
Marine Institute
Publisher
Civil Engineering Research Association of Ireland
Publisher DOI
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
cbn
Collections
Civil Engineering (Conference Papers)