Seismic Strengthening of Rocking-Critical Masonry Piers
Publication: Journal of Structural Engineering
Volume 133, Issue 10
Abstract
Systems of discrete wall piers and spandrels created by large openings are particularly weak in resisting in-plane lateral loads. The rocking piers thus stabilized by hold-down vertical forces have excellent strength, stiffness, and ductility in a very stable manner for a safer and better performance under lateral loads. However, the undesirable compressive mode of failure of stabilized rocking piers at larger drifts can be eliminated by the use of yielding energy dissipation device to limit the forces in verticals and thereby the compression force in rocking piers. A displacement-based design procedure can be used to design the energy dissipation devices and other stabilizing elements. A simple mechanics model is developed for the nonlinear load–deformation relationship of the stabilized piers which is accurate enough for design purposes. This performance-based design scheme rationally accounts for the superior ductility and energy dissipation characteristics of strengthened rocking piers.
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Acknowledgments
The experimental work was carried out at the Department of Civil Engineering, University of Michigan, Ann Arbor, Mich. Acknowledgement is due to National Science Foundation (Grant Nos. NSFBCS9120096 and NSFCMS 9422010) for providing funds for this research. Special thanks are due to William Holmes and Bret Lizundia of Rutherford and Chekene, San Francisco, for providing information about old masonry buildings. The conclusions and opinions expressed in this paper are solely those of the writers and do not necessarily represent the views of the sponsors.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 10 • October 2007
Pages: 1445 - 1452
Copyright
© 2007 ASCE.
History
Received: Mar 15, 2005
Accepted: May 15, 2007
Published online: Oct 1, 2007
Published in print: Oct 2007
Notes
Note. Associate Editor: Reginald DesRoches
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