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    Modeling of Post-yield Buckling of Reinforcement

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    12587352_2002_ASCESTR_1__Modeling.pdf (643.6Kb)
    Author
    Dhakal, R.P.
    Maekawa, K.
    Date
    2002
    Permanent Link
    http://hdl.handle.net/10092/4199

    Finite element analysis using fiber technique was carried out to study the post-yield buckling mechanism of reinforcing bars. It was found that the softening of compressive stress takes place due to the geometrical nonlinearity associated with the lateral deformation of the compressed bars, especially after the absolute strain exceeds the yielding strain. It was clarified that the post-buckling average stress-strain relationship over the analysis domain can be specified in terms of the product of square root of yield strength and slenderness ratio of the reinforcing bar. Moreover, a unique relationship between the average stress and average strain of reinforcing bars including the effect of buckling is established through various parametric analyses. The comparison of analytical results and proposed model with experimental data showed good agreement.

    Subjects
    buckling
     
    lateral deformation
     
    reinforcing bar
     
    average compressive response
     
    point wise stress-strain relationship
     
    geometrical nonlinearity
     
    Fields of Research::290000 Engineering and Technology::290800 Civil Engineering::290801 Structural engineering
     
    Fields of Research::290000 Engineering and Technology::290800 Civil Engineering::290805 Geotechnical engineering
    Collections
    • Engineering: Journal Articles [932]
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