Shake Table Testing of Posttensioned Concrete Masonry Walls with Openings
Publication: Journal of Structural Engineering
Volume 133, Issue 11
Abstract
The in-plane seismic response of posttensioned concrete masonry walls with openings is investigated by means of shake table testing. A test program was initiated to verify the seismic performance of a wall system for use in residential construction. Two single-story in-plane wall tests were conducted initially to study the effect of door and window openings. This led to the construction and testing of a simple square structure which investigated the influence of multiple door and window openings and wall corners. All walls were posttensioned using unbonded high-tensile steel bars which allowed the wall panels to rock at the wall-foundation interface. Wall damage consisted of masonry crushing in the lower wall corners and vertical cracking under the openings and in the lintels. Residual displacements were minimal, due to the restoring forces provided by the posttensioning tendons. A complete description of the test setup and results is provided, including discussion on wall structural response in terms of flexural strength, displacement capacity, deformed shape, and damage patterns.
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Acknowledgments
The writers wish to acknowledge the contributions made by the United States based masonry contracting and supply companies: Adams Products Company, Whitman Masonry Inc., Brodie Contracting, Gerdau AmeriSteel and Sika Corporation. The National Concrete Masonry Association (NCMA), Fulbright New Zealand, the Todd Foundation, and the University of Auckland are thanked for their financial assistance. The valuable input from Dr. John Butterworth, Dr. Peter Laursen, and Andrew Wilton is also recognized. Finally the writers wish to acknowledge Jerry Atkinson and Matt Vory for their assistance with the construction and testing of the wall specimens.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 11 • November 2007
Pages: 1551 - 1559
Copyright
© 2007 ASCE.
History
Received: Jan 9, 2006
Accepted: Jun 22, 2006
Published online: Nov 1, 2007
Published in print: Nov 2007
Notes
Note. Associate Editor: Yahya C. Kurama
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