Recent studies have revealed that plates stiffened by closed-section ribs can be designed to have greater strength. Thus, this study is about the increasing effect on local plate buckling strength of isotropic plates when longitudinally stiffened with closed-section ribs, which is mainly due to the rotational restraint of the closed-section ribs. The effects on buckling strengths of the stiffened plates are examined by numerical analyses. Three-dimensional finite element models were obtained using a general structural analysis program ABAQUS and a series of eigenvalue analyses were conducted. Through this study, the increasing effect on the local buckling strength due to the rotational stiffness is numerically verified. From the parametric studies, there is an obvious tendency that the local buckling strength of the stiffened plate would converge to the buckling strength of plate with fixed boundary condition. The findings of this study would contribute in improving the optimum design of longitudinally stiffened isotropic plates.

ABSTRACT
 1. 서 론
 2. 이론적 배경
 3. 해석모델
 4. 유한요소해석
 5. 해석결과
 6. 결 론
 References

• Arriane Nicole P. Andico(한밭대학교 토목공학과)
• 곽재영(한밭대학교 토목공학과) | Kwak Jae-Young
• 최병호(한밭대학교 건설환경공학과) | Choi Byung-Ho 교신저자