Determining Rotational Stiffness of Buckling Stiffener in PLATE-BUCKLING

How is the rotational stiffness of a buckling stiffener determined in PLATE‑BUCKLING?

Answer:

In PLATE‑BUCKLING, the rotational stiffness of a stiffener is determined on the basis of the sketch shown in the figure, including formulas according to ECCS Design of Plated Structures, Fig. 2.77.

c_{θ} = \frac{E \cdot t^{3}}{3 \cdot b}

cθ	Rotational stiffness of the buckling stiffness
E	Modulus of elasticity
t	Component thickness in the buckling panel
b	Distance to the next stiffener

Rotational Stiffness of Stiffener with Same Distances to Next Stiffener

c_{θ} = \frac{E \cdot t^{3} \cdot (b_{1} + b_{2})}{4 \cdot b_{1} \cdot b_{2}}

cθ	Rotational stiffness of the buckling stiffness
E	Modulus of elasticity
t	Component thickness in the buckling panel
b₁	Distance to the next stiffener on one side
b₂	Distance to the next stiffener to the other side