Investigation of Concrete-Filled Double-Skin Steel Tubular Columns with Ultrahigh-Strength Steel
Publication: Journal of Structural Engineering
Volume 141, Issue 7
Abstract
Concrete-filled steel tubular (CFT) columns have been used increasingly in building structures because of their construction efficiency and provision of high stiffness and strength. A relatively new configuration design with inserted inner steel tubes, so-called concrete-filled double-skin steel tubes (CFDSTs), has been developed in the field. To promote the seismic capability of the CFT/CFDST columns further, the authors present results from an experimental investigation of CFT and CFDST columns using ultrahigh-strength steel. Eight scaled column specimens were examined by subjecting them to combined axial and flexural cyclic loadings. The performance of the CFT and CFDST design configurations using high-strength steel was comparable and both provide large moment capacities and elastic deformation capacities. The ultimate member moment capacity could be predicted accurately using a proposed simple formulation based on the concept of the superposed strength method. Various performance parameters are evaluated and discussed, and the influence of compressive strength of the concrete core, applied axial loads, and inserted inner steel tubes on the seismic behavior of the column members is clarified by the experimental results.
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Information
Published In
Journal of Structural Engineering
Volume 141 • Issue 7 • July 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 30, 2013
Accepted: May 30, 2014
Published online: Aug 11, 2014
Discussion open until: Jan 11, 2015
Published in print: Jul 1, 2015
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