Journal of Failure Analysis and Prevention

, Volume 17, Issue 3, pp 554–562 | Cite as

Comparative Study of Elastic Buckling of Plates Stiffened with Angle Bar Stiffeners

  • Ahmad Rahbar Ranji
Technical Article---Peer-Reviewed


Interactions of different buckling modes in stiffened plates reduce Euler stress. In lieu of detailed analysis, in classification societies rule and in the literature, each buckling mode is treated independently and restraining effect of the adjacent elements is considered as rotational spring. It is the main aim of the present work to compare different rule-based and literature-based expressions proposed for the stiffness of these rotational springs and to determine the accuracy and applicability of them using energy method. Different buckling modes including, plate, torsional, and web buckling and interaction of them are investigated. Upon comparison with given expressions and finite element method, it is found that some of the proposed expressions for stiffness of rotational spring are not applicable in certain conditions.


Plate buckling Stiffened panel Torsional buckling Web buckling Plate torsional rigidity 

List of symbols


Length attached plate panel


Width of attached plate panel


Breadth of the upper flange


Flexural rigidity of attached plate


Flexural rigidity of web


Young’s modulus


Shear modulus


Web height of T-bar stiffener


Polar moment of inertia about center of torsion


Sectorial moment of inertia about center of torsion


St. Venant’s moment about center of torsion


St. Venant’s torsional constant of stiffener


Spring stiffness of attached plate


Half wave numbers in the longitudinal direction


Thickness of the upper flange


Thickness of attached plate


Thickness of the web


Plate aspect ratio


Poisson’s ratio


Applied compressive stress


Plate Euler stress


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Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.Department of Ocean EngineeringAmirKabir University of TechnologyTehranIran

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