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Global Interventions for Seismic Upgrading of Substandard RC Buildings

Thermou, G. E.; Pantazopoulou, S. J.; Elnashai, A. S.

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G. E. Thermou

S. J. Pantazopoulou

A. S. Elnashai



A methodology is developed in this paper for the design and proportioning of interventions for seismic upgrading of substandard
reinforced-concrete (RC) buildings. The retrofit approach is presented in the form of a simple design tool that aims toward both demand reduction and enhancement of force and deformation supply through controlled modification of stiffness along the height of the building. This objective is achieved by engineering the translational mode-shape of the structure, so as to optimize the distribution of interstory drift. Results
from the proposed approach are summarized in a spectrum format in which demand, expressed in terms of interstory drift, is related to stiffness. Design charts, which relate the characteristics of commonly used global intervention procedures to influence drift demands, are developed to facilitate the retrofit design. The intervention procedures considered in this paper are reinforced-concrete jacketing, the addition of reinforced concrete walls, and the addition of masonry infills. The proposed methodology is also amenable to adaptation to other strengthening methods, such as the addition of cross-bracing.

Journal Article Type Article
Acceptance Date Aug 2, 2011
Online Publication Date Aug 5, 2011
Publication Date 2012-03
Deposit Date Dec 3, 2018
Publicly Available Date Jan 24, 2020
Journal Journal of Structural Engineering
Print ISSN 0733-9445
Electronic ISSN 1943-541X
Publisher American Society of Civil Engineers
Peer Reviewed Peer Reviewed
Volume 138
Issue 3
Pages 387-401
Public URL
Publisher URL
Additional Information This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at


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