Seismic Performance of Nonprestressed and Prestressed HPC Frames under Low Reversed Cyclic Loading
Publication: Journal of Structural Engineering
Volume 137, Issue 11
Abstract
Previous studies primarily focused on the seismic performance of high-strength concrete (HSC) members and the static behavior of high-performance concrete (HPC) members. The work presented here aims at studying seismic performance of HPC frames under low reversed cyclic loading to provide guidance to support the design of HPC structures in seismic regions. Experimental studies are conducted to investigate failure patterns, failure mechanism, strains of longitudinal bars, - curves, characteristic loads, displacement-restoring capacity, displacement ductility coefficient, stiffness degradation, and the energy-dissipation capacity of two-bay, two-story HPC frames under low reversed cyclic loading. Studies indicate that both nonprestressed and prestressed HPC frames show good seismic performance during testing. The two HPC frames both fail in a partial beam sidesway mechanism. The hysteresis area of the nonprestressed frame is larger than that of the prestressed frame, whereas both frames still show relatively high energy-dissipation capacity. The applied prestressing in frame beams could enhance the displacement-restoring capacity of frames but decreases the energy dissipation. The prestressed frame exhibits a better ductile manner than the nonprestressed frame.
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Acknowledgments
This study was financially supported by the Foundation for University Key Teachers by the Ministry of Education (MESSC-JPGG-430-10247-1183) and the Fund of Rising-Star Plan of Shanghai Scientific and Technical Committee (No. UNSPECIFIED02QF14047), which the authors gratefully acknowledge.
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Information
Published In
Journal of Structural Engineering
Volume 137 • Issue 11 • November 2011
Pages: 1254 - 1262
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Feb 12, 2009
Accepted: Dec 27, 2010
Published online: Dec 29, 2010
Published in print: Nov 1, 2011
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