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Title |
Tensile Strength Change of Circular Structural member with Artificial Sectional Surface Damage
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Authors |
하민균(Min-Gyun Ha) ; 권태윤(Tae-Yun Kwon) ; 이원홍(Won-Hong Lee) ; 안진희(Jin-Hee Ahn) |
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DOI |
https://doi.org/10.11112/jksmi.2021.25.3.100 |
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Keywords |
원형단면 강관부재; 표면부식; 단면손상; 부식수준; 잔존 인장성능 Circular tubular member; Surface corrosion; Sectional damage; Corrosion level; Residual tensile strength |
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Abstract |
This study was examined the tensile strength change of a circular tubular member with artificial sectional damage on its surface to consider surface sectional damage by corrosion. The tensile strength tests were conducted using circular tubular specimens with artificial sectional damage considering sectional damaged height and width on its surface according to the corrosion level. From the tensile strength test results, it is confirmed that tensile strength of the circular tubular specimens was affected by the damaged circumference (damaged width), not damaged length (damaged height) and their tensile failures were appeared at the minimum section of the artificial sectional damage part. Nonlinear finite-element analyses were conducted considering equivalent sectional damage effect on sectional damaged part in tensile specimens to examine the change in the tensile strength of tubular specimens with artificial sectional damage since it is difficult to estimate the sectional damaged surface condition of the specimens clearly. From the nonlinear finite element analysis results for the tensile test specimens, tensile strengths of test specimens with irregular sectional damaged surface were relatively evaluated to be highly decreased than these of FE analysis model with equivalent sectional damage. Therefore, residual tensile strengths of tensile members with irregular sectional damage as local corrosion can be evaluated and predicted using correlation coefficient between tensile test results and FE analysis results with equivalent sectional damage.
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