This paper conducted a comparative analysis of the shear buckling characteristics of trapezoidal and sinusoidal corrugated steel plates considering of their initial imperfection. Initial imperfection refers to the state where the shape of the corrugated plate is initially not perfect. As such, an initially imperfect shape was assumed using the eigen buckling mode. To calculate the buckling stress of corrugated steel plates, the linear buckling analysis used a boundary condition which was applied to the plate buckling analysis. For the comparison of trapezoidal and sinusoidal corrugation, the shape parameters were assumed using the case where the length and slope of each corrugation were the same, and the initial imperfection was considered to be from 0.1% to 5% based on the length of the steel plate. Here, for the buckling analysis, ANSYS, a commercial FEA program, was used. From the results of buckling analysis, the effect of overall initial imperfection showed that the larger the initial imperfection, the lower the buckling stress. However, in the very thin model, interaction or local buckling was dominant in the perfect shape, and in this case, the buckling stress did not decrease. Besides, the sinusoidal model showed higher buckling stress than the trapezoidal one, and the two corrugation shapes decreased in a similar way.

Abstract
1. 서론
2. 해석대상 모델과 경계조건
3. 초기불완전성을 고려한 사인형 주름강판의 전단 좌굴
    3.1 주름 강판 두께(t)에 따른 비교
    3.2 초기불완전성(Imperfection)의 영향
4. 초기 불완전성을 고려한 제형 주름강판의 전단좌굴
    4.1 주름 강판 두께(t)에 따른 비교
    4.2 초기불완전성(Imperfection)의 영향
5. 결론
References

• 서건호(한국기술교육대학교 미래융합공학전공) | Seo Geonho (Future Convergence Eng., Koreatech University)
• 손수덕(한국기술교육대학교 건축공학과) | Shon Sudeok (Dept. of Architectural Eng., Koreatech University) 교신저자
• 이승재(한국기술교육대학교 건축공학과) | Lee Seungjae (Dept. of Architectural Eng., Koreatech University)