Practical Nonlinear Analysis Methods for Flexure-Dominated Reinforced Masonry Shear Walls
Publication: Journal of Structural Engineering
Volume 148, Issue 8
Abstract
Reinforced masonry (RM) shear walls are the main seismic force–resisting elements in masonry buildings. Current guidelines and nonlinear modeling methods for evaluating the seismic performance of existing RM shear walls were developed many years ago based on limited experimental data. They tend to underestimate the displacement capacity of RM walls by a significant amount. This paper presents a modeling method along with suitable material models, based on a fiber-section beam-column element idealization, to capture the nonlinear in-plane cyclic behavior of flexure-dominated RM walls. The modeling method accounts for the buckling and low-cycle fatigue of vertical reinforcing bars, which often occur in the toe regions of RM walls under severe seismic actions, in an approximate manner. The model has been validated by experimental data on fully grouted planar walls and T-walls constructed of concrete masonry units. Moreover, a simple and rational method to construct lateral force-versus-lateral displacement backbone curves for flexure-dominated RM walls is presented. The proposed method produces backbone curves that show a significantly better agreement with experimental data compared with that recommended in current guidelines.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
A significant portion of the work presented in this paper was carried out as part of the ATC 114 project, which was supported by NIST, with Ronald Hamburger as the Project Director, Jon Heintz as the Program Manager, and Ayse Hortacsu as the Associate Program Manager. However, opinions expressed in this paper are those of the authors and do not necessarily represent those of the sponsor or others.
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Journal of Structural Engineering
Volume 148 • Issue 8 • August 2022
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© 2022 American Society of Civil Engineers.
History
Received: Jun 7, 2021
Accepted: Apr 15, 2022
Published online: Jun 15, 2022
Published in print: Aug 1, 2022
Discussion open until: Nov 15, 2022
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