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Design Methodology for Seismic Upgrading of Substandard Reinforced Concrete Structures

Thermou, Georgia E.; Pantazopoulou, Stavroula J.; Elnashai, Amr S.


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Assistant Professor in Structural Engineering

Stavroula J. Pantazopoulou

Amr S. Elnashai


This article presents a design methodology for seismic upgrading of existing reinforced concrete (RC) buildings. The methodology is based on the modification of the deflected shape of the structure so as to achieve a near-uniform distribution of interstorey drift along the building height, thereby eliminating damage localization. Yield Point Spectra are utilized for the definition of demand and a direct displacement-based design approach is implemented. The fundamental steps of the method are described in detail, including a systematic evaluation of assumptions and limitations. A full-scale tested structure is used as a case study for assessment and verification of the proposed methodology. Alternative retrofit scenarios are set according to target response and performance levels. The role of the target deflected response shape and its influence on the outcome of the retrofit strategy is investigated. The viability of the alternative retrofit scenarios is studied for different ground motions including near-fault earthquake records.


Thermou, G. E., Pantazopoulou, S. J., & Elnashai, A. S. (2007). Design Methodology for Seismic Upgrading of Substandard Reinforced Concrete Structures. Journal of Earthquake Engineering, 11(4), 582-606. doi:10.1080/13632460601031573

Journal Article Type Article
Acceptance Date Jul 12, 2006
Online Publication Date Jul 9, 2007
Publication Date Jul 30, 2007
Deposit Date Dec 10, 2018
Publicly Available Date Dec 20, 2018
Journal Journal of Earthquake Engineering
Print ISSN 1363-2469
Electronic ISSN 1559-808X
Publisher Taylor & Francis
Peer Reviewed Peer Reviewed
Volume 11
Issue 4
Pages 582-606
Public URL
Publisher URL
Additional Information This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Earthquake Engineering on 9 July 2007, available online:


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