Backbone Model for Confined Masonry Walls for Performance-Based Seismic Design
Publication: Journal of Structural Engineering
Volume 135, Issue 6
Abstract
In this study, a performance-based model is proposed, capable of simulating seismic behavior of typical confined masonry (CM) walls whose response is governed by shear deformations. This model is developed on the basis of both monotonic and reversed-cyclic experiments assembled in an extensive database, and derived through an iterative linear regression analysis. Owing to the limited data available and inconsistencies in observed behavior in some tests, only specimens with two tie columns, one on either edge of the wall; multiple longitudinal rebar per confining element; no bed joint reinforcement; no openings within the confined panel; and a height-to-length ratio that varies from 0.7 to 1.2, are considered for the purpose of model development. The effect of openings on strength characteristics, the capability of existing models to predict seismic behavior of CM walls, and the limitations of the proposed equations are discussed in detail. The accuracy of the model is also verified for CM walls with different characteristics. The proposed model simulates reasonably well the seismic behavior of CM walls whose properties conform to the assumptions of the model and that correspond to typical CM walls.
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Acknowledgments
Support for the research presented in this paper was provided by the Earthquake Engineering Research Institute and the Natural Sciences and Engineering Research Council of Canada. This support is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 135 • Issue 6 • June 2009
Pages: 644 - 654
Copyright
© 2009 ASCE.
History
Received: Feb 1, 2008
Accepted: Dec 15, 2008
Published online: Feb 25, 2009
Published in print: Jun 2009
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