Concrete
Filled Steel Tube with PC Bars
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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.