Shake-Table Response of a Coupled RC Wall with Thin T-Shaped Piers
Publication: Journal of Structural Engineering
Volume 143, Issue 5
Abstract
A shake-table test of a 1:3 scale model of a thin, lightly reinforced concrete (RC), 5-story coupled wall, representing a typical apartment building with a high wall-to-floor area ratio, was performed. The wall consisted of two T-shaped piers, faced to each other by the webs, which were connected at each story level by the coupling beam and slab. The wall was subjected to a series of uniaxial and biaxial seismic excitations. Two different structural details providing different degrees of confinement were used at the free edges without boundary columns. The lightly confined free edges of the flanges (using hairpin transverse reinforcement) behaved satisfactorily in the case of moderate seismic demand. Due to the beam–slab interaction and the slab, which was considerably ticker than in typical buildings, the coupling beams were much stronger than expected, causing brittle shear failure of the overloaded wall piers under bidirectional excitation. The analyzed wall developed substantial strength and low ductility. The main observations of the experiment were confirmed by the results of postexperimental analytical studies performed using a three-dimensional (3D) multiple vertical-line element model, which has been incorporated into a well-known open-code program system.
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Acknowledgments
The presented research was supported by the Ministry of Higher Education, Science and Technology of the Republic of Slovenia, and by the ECOLEADER Project “Seismic Performance of Lightly Reinforced Structural Walls in Low to Moderate Seismicity Areas,” as part of the Enhancing Access to Research Infrastructures, Human Potential Program of the European Commission. The shake table test was performed by the National Laboratory for Civil Engineering (LNEC) in Lisbon. The test and numerical analyses were performed by Peter Kante.
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Published In
Journal of Structural Engineering
Volume 143 • Issue 5 • May 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Mar 27, 2015
Accepted: Oct 5, 2016
Published online: Jan 23, 2017
Published in print: May 1, 2017
Discussion open until: Jun 23, 2017
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