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A new base plate system using deformed reinforcing bars for concrete filled tubular column

  • Park, Yong-Myung (Department of Civil Engineering, Pusan National University) ;
  • Hwang, Won-Sup (Department of Civil Engineering, Inha University) ;
  • Yoon, Tae-Yang (Civil Engineering Research Team, Research Institute of Industrial Science and Technology) ;
  • Hwang, Min-Oh (Civil Engineering Research Team, Research Institute of Industrial Science and Technology)
  • Received : 2004.08.24
  • Accepted : 2005.03.25
  • Published : 2005.10.25

Abstract

An experimental study was conducted to develop a new base plate anchorage system for concrete filled tubular column under an axial load and a moment. The column was connected to a concrete foundation using ordinary deformed reinforcing bars that are installed at the inside and outside of the column. In order to investigate the moment resisting capacity of the system, horizontal cyclic loads are applied until the ultimate condition is reached with the axial load held constant. To derive a design method for moment resisting capacity, the reinforced concrete section approach was investigated with the assumption of strain compatibility. The results by this approach agreeded well with those of experiments when the bearing pressure of confined concrete and tangent modulus of steel bars are assumed appropriately. Also, it was found that the column interaction curve can be used to predict the yield strength of the base plate system.

Keywords

column base plate;reinforcing bar anchor;moment resisting capacity;reinforced concrete section method;interaction curve

Acknowledgement

Supported by : Korean ministry of science & technology

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