Shake-Table Tests of a Full-Scale Two-Story Shear-Dominated Reinforced Masonry Wall Structure
Publication: Journal of Structural Engineering
Volume 142, Issue 10
Abstract
This paper presents the shake-table tests of a full-scale, two-story, reinforced masonry shear-wall structure designed by a displacement-based method. The test structure had two T-sectioned and one rectangular-sectioned wall components along the direction of the table motion, and four rectangular-sectioned wall components in the orthogonal direction. The structure was subjected to a series of dynamic tests with a historical ground motion record scaled to intensity levels up to that of the maximum considered earthquake (MCE). The structure formed a soft-story mechanism during the last test. The recorded displacements were within the target limits for the design earthquake-level table motion, but exceeded the target limits for the MCE level. Although the structure experienced severe damage and incurred diagonal cracking in wall components with low aspect ratios, it did not collapse. The comparison of the analysis results to the test results shows that the walls in the orthogonal direction had a significant contribution to the lateral load resistance of the structure as they exerted axial compression through the horizontal diaphragms and lintels on the wall components parallel to the loading direction when the latter rocked. For this structure, the conventional force-based design method could result in unsatisfactory performance.
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Acknowledgments
This study was supported by a NIST ARRA Measurement Science and Engineering Grant awarded to the University of California at San Diego under Award No. 60NANB10D013. The shake-table tests were conducted with the support of the Network for Earthquake Engineering Simulation Program of NSF. The test structure was constructed with masonry units contributed by RCP Block and Brick. The first author would also like to acknowledge a Graduate Fellowship from UC San Diego, which partially supported his graduate studies. The technical assistance and support of the staff at the Englekirk Structural Engineering Center of UC San Diego in the shake-table tests is greatly appreciated. The opinions expressed in this paper are those of the authors and do not necessarily represent those of the sponsors.
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© 2016 American Society of Civil Engineers.
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Received: Mar 4, 2015
Accepted: Feb 2, 2016
Published online: May 3, 2016
Published in print: Oct 1, 2016
Discussion open until: Oct 3, 2016
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