Experimental Evaluation of Pretopped Precast Diaphragm Critical Flexure Joint under Seismic Demands
Publication: Journal of Structural Engineering
Volume 137, Issue 10
Abstract
Precast concrete diaphragm seismic response is examined in experimental research integrating model-based simulation with physical testing. The experimental substructure is the diaphragm critical flexural region of a prototype precast parking structure. This region is expected to undergo significant inelastic flexural deformation, while potentially nonductile regions remain elastic on the basis of capacity design rules from an emerging design methodology. The physical test is conducted at half-scale. The test specimen is detailed using diaphragm reinforcement intended to meet deformability requirements. Predetermined displacement histories are applied to the test specimen on the basis of nonlinear transient dynamic analyses of the prototype structure. The loading history is applied by a test fixture capable of simultaneously providing shear, axial, and moment to the joint. Moment strength, stiffness, rotational deformation capacity, and progressive damage are examined under a sequence of increasing intensity earthquakes. Design recommendations are provided.
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Acknowledgments
This research was supported by the Precast/Prestressed Concrete Institute (PCI), the Charles Pankow Foundation, and the National Science Foundation (NSF) under Grant NSFCMS-0324522. The authors are grateful for this support. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. The contributions of NEES@Lehigh staff, in particular Tommy Marullo, are noted.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 137 • Issue 10 • October 2011
Pages: 1063 - 1074
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jul 9, 2009
Accepted: Nov 9, 2010
Published online: Dec 3, 2010
Published in print: Oct 1, 2011
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