International journal of steel structures (국제강구조저널)

Korean Society of Steel Construction (한국강구조학회)
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Prediction of Hysteretic Behavior of High-Strength Square Concrete-filled Steel Tubular Columns Subjected to Eccentric Loading

  • Chung, Kyung-Soo (Steel Structure Research Division, RIST) ;
  • Kim, Jin-Ho (Steel Structure Research Division, RIST) ;
  • Yoo, Jung-Han (School of Architecture, Seoul National University of Science & Technology)
  • Received : 2012.01.06
  • Accepted : 2012.05.29
  • Published : 2012.06.30
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Abstract

This study aimed at predicting the structural behavior of high-strength square CFT (concrete-filled steel tube) columns. First, the material models of the existing steel tube and concrete were compared, and a nonlinear fiber element analysis method was proposed. To verify the proposed fiber element analysis method, the behavior of CFT columns made from high-strength materials was investigated experimentally. CFT members consisted of high-strength steel tubes (yield strength; $f_y$=913 MPa) and high-strength concrete ($f_{ck}$=91.3 MPa). The moment-rotation relationships for hollow and concrete-filled steel tubes were compared. In addition, the P-M interaction diagrams for the experiment result and AISC-LRFD code provisions were compared. Finally, the result of the fiber element analyses was compared with the test results.

Keywords

Acknowledgement

Supported by : Ministry of Land, Transport and Maritime Affairs

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