PSI - Issue 48

Nemanja Ilić et al. / Procedia Structural Integrity 48 (2023) 318 – 325 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Table 1. Vessel particulars. Length overall

Breadth 11.40 m

Height 5.30 m

Draught 3.20 m

110.10 m

Fig. 1. General arrangement and mid-section.

Table 2. Cross section elements dimensions. Bottom longitudinals

HP160x8, spacing – 520 mm HP180x9, spacing – 520 mm HP160x8, spacing – 500 mm HP 180x9, spacing – 630 mm HP 160x8, spacing – 520 mm

Inner bottom longitudinals Inner side longitudinals

Side frame

Deck longitudinals

10 mm 10 mm 12 mm

Bottom plating

Centre bottom girder

Bilge plating

8 mm 8 mm 9 mm

Inner bottom plating Inner side plating

Side plating Deck plating

9-10 mm

3. Methodology 3.1. Progressive collapse analysis (PCA method)

Ultimate strength with respect to vertical bending moment is assessed since the bending in vertical plane is assumed as the most dominant load for IWV. Sagging is the type of bending in which the elements above the neutral axis are in compression while the elements below the neutral axis are yielding. Hogging is the opposite of sagging: elements above the neutral axis are in yielding and elements below the neutral axis are in compression, see Fig. 2. If extreme bending is applied to the hull girder, elements under the compression will progressively undergo buckling and furthermore, a post-buckling behavior. On the other side of the cross section, elements will yield following the nonlinear stress-strain curve. While bending is being increased, both buckling and yielding will be transferred from