Journal of the Japan Society of Erosion Control Engineering, Vol.59,No.4,2006
Absorption energy capacity method for Concrete filled steel tubular beam
with residual bending deformation
Hirobumi SHIRAISHI Satoshi KATSUKI Joji SHIMA
Abstract
This study proposes an analytical approach to evaluate the absorption energy capacity
of a damaged concrete filled tubular after being hit by rocks contained in a debris
flow. The relationship between bending moment and curvature of the concrete filled
tubular is estimated by using the sectional element partition method. In order
to account for the damaged effect, the constitutive laws of virgin steel material
is modified to include the residual plastic strain effect. This method can estimate
relatively well the behaviors of damaged concrete filled tubular, especially maximum
load and ultimate deformation related with the sectional breaking.
Key words:Concrete Filled Steel Tubular, residual plastic deformation, residual
absorption energy, sectional element partition method
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