Structural Engineering and Mechanics

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Concrete contribution to initial shear strength of RC hollow bridge columns

  • Kim, Ick-Hyun (University of Ulsan, Department of Civil and Environmental Engineering) ;
  • Sun, Chang-Ho (University of Ulsan, Department of Civil and Environmental Engineering) ;
  • Shin, Myoungsu (Ulsan National Institute of Science and Technology (UNIST), School of Urban and Environmental Engineering)
  • Received : 2011.04.20
  • Accepted : 2011.11.23
  • Published : 2012.01.10
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Abstract

The primary objective of this study was to identify concrete contribution to the initial shear strength of reinforced concrete (RC) hollow columns under lateral loading. Seven large-scale RC rectangular hollow column specimens were tested under monotonic or cyclic lateral loads. The most important design parameter was column length-to-depth aspect ratio ranging between 1.5 and 3.0, and the other test variables included web area ratio, hollow section ratio, and loading history. The tests showed that the initial shear strength reduced in a linear pattern as the column aspect ratio increased, and one specimen tested under cyclic loading achieved approximately 83% of the shear strength of the companion specimen under monotonic loading. Also, several pioneering shear models proposed around the world, all of which were mainly based on tests for columns with solid sections, were reviewed and compared with the test results of this study, for their possible applications to columns with hollow sections. After all, an empirical equation was proposed for concrete contribution to the initial shear strength of RC hollow columns based on fundamental mechanics and the test results.

Keywords

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