Concrete Filled Steel Tube with PC Bars
  For a boulder which occurs unusually,the high quality of ductility is required to rocksheds because the plastic deformation of members of them produces a large energy absorption.
 The member which has large ductility was developed and tested.This member consists of a concrete filled steel tube and unbonded PC bars to reinforcing it.
 It is confirmed that this member has enough carrying capacity and much ductility under static loads and impulsive loads.
BENDING TEST OF CFST
REINFORCED BY UNBONDED PC BARS
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