Global Interventions for Seismic Upgrading of Substandard RC Buildings
Publication: Journal of Structural Engineering
Volume 138, Issue 3
Abstract
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.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 138 • Issue 3 • March 2012
Pages: 387 - 401
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Feb 22, 2011
Accepted: Aug 2, 2011
Published online: Aug 5, 2011
Published in print: Mar 1, 2012
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