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Title |
An Analytical Review on the Inelastic Region of Column Strength Curve Associated with Residual Stress of Steel Member under Axial Force
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DOI |
https://doi.org/10.11112/jksmi.2018.22.2.161 |
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Keywords |
CRC기둥강도곡선 ; 접선탄성계수 ; 잔류응력 ; 재료비례한도 CRC column strength curve ; Tangential modulus ; Residual stress ; Limit of material proportionality |
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Abstract |
This study is the analytical review on the inelastic region of CRC column strength curve. The inelastic region of CRC column strength curve is based on the Bleich theory and the maximum residual stress of 0.5σy. This is somewhat conservative by considering the fact that the maximum residual stress of 0.3σy is well known. This study proposes column strength curve for nonlinear behavior of hot rolled structural steel members under axial force and tangent modulus Et, with the maximum residual stress of 0.3σy and compares them with those of CRC. The stress of the inelastic column under axial compression exceeds proportional limits and reaches yielding point before applied load render the column bent. The column strength curve that depends on gradually yielding state of section needs to be reviewed. In this study, it is derived that the critical load formular according to material yielding with the maximum residual stress of 0.5σy and compared with CRC column design curve.
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