Modeling of Inelastic Rocking Bodies under Cyclic Loading
Publication: Journal of Engineering Mechanics
Volume 146, Issue 4
Abstract
The use of rocking members in earthquake-resistant structural systems has gained attention in recent years due to their inherent benefits, including the limitation of damage, recentering capabilities, and reduction of seismic forces transmitted to the rest of the structure. In this paper, the ideas behind the elastic macroelement formulation proposed by the authors in previous works, able to account for the deformability of the member along its height and across its base, are extended in order to predict the planar cyclic response of inelastic rocking members. To this end, the rocking interface is discretized and a nonlinear compression-only stress distribution is determined so that the sum of the induced elastic member displacements, calculated using the provided solutions based on the theory of elasticity, and the plastic ones induced in inelastic regions, agrees with the target displacements. Characteristic example cases are presented, and the results produced by the proposed macroelement are compared with experimental ones, showing that the form of the response of various rocking member configurations found in the literature can be adequately captured.
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Data Availability Statement
Code generated during the study is available from the corresponding author by request (macroelement code compatible with OpenSees). Some data used during the study were provided by third parties [experimental responses of specimens SRW-B and EC COMP 1 shown in Figs. 18(a) and 19(a), respectively]. Direct requests for these materials may be made to the providers, as indicated in the Acknowledgments.
Acknowledgments
The authors are grateful to Prof. R. Henry from the University of Auckland, New Zealand, for providing the experimental data of the tendon-restrained concrete wall SRW-B used in Fig. 18 and Prof. F. Graziotti from the University of Pavia, Italy, for providing the experimental data of the calcium–silicate brick masonry wall EC COMP 1 used in Fig. 19.
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Published In
Journal of Engineering Mechanics
Volume 146 • Issue 4 • April 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Dec 3, 2018
Accepted: Oct 21, 2019
Published online: Feb 12, 2020
Published in print: Apr 1, 2020
Discussion open until: Jul 12, 2020
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