High-Strength Concrete Columns under Eccentric Load
Publication: Journal of Structural Engineering
Volume 132, Issue 7
Abstract
The behavior of high strength concrete tied columns was investigated. A total of 11 columns were tested under monotonic loading having two different eccentricities. The main variables investigated were: (1) the mechanical ratio, (2) the spacing, and (3) the configuration of transverse reinforcement. Test results indicate that, under monotonically increasing axial load, the cross ties with a 135° hook at one end and 90° bent at the other end provide ductility comparable to ties supporting the intermediate longitudinal bars. Also the use of four different equivalent rectangular stress blocks (ERSBs) in predicting the ultimate strength of members made of high strength concrete was evaluated. It is concluded that calculations made using the ACI 318-02 stress block always gives an upper bound, whereas a lower bound is obtained by the CSA A23.3-94 approach. Capacities calculated using the ERSB proposed by Bae and Bayrak, and Ozbakkaloglu and Saatcioglu also agree quite well with the test results.
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Acknowledgments
This study was conducted at the Structural Mechanics Laboratory of Middle East Technical University and was sponsored by the Middle East Technical University (Grant No. UNSPECIFIEDAFP-91.03.03.01), and the Scientific and Technical Research Council of Turkey (Grant No. UNSPECIFIEDINTAG 502). The writers extend their appreciation to Mr. Ahmet Yildirim for his valuable contributions in testing of Series II specimens.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 132 • Issue 7 • July 2006
Pages: 1052 - 1060
Copyright
© 2006 ASCE.
History
Received: Nov 29, 2004
Accepted: Aug 23, 2005
Published online: Jul 1, 2006
Published in print: Jul 2006
Notes
Note. Associate Editor: Yahya C. Kurama
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