The Influence of Superstructure on the Longitudinal Ultimate Strength of a RO-RO Ship

摘要

Superstructure of a RO-RO ship plays an important role to allocatethings inside the ship, for instance passengers, cars, goods and so on.Superstructure consists of transversal and longitudinal deck beam tosupport the structure. It is well known that the superstructure hassignificant contribution to the longitudinal strength. The investigationof the superstructure of a RO-RO ship particularly its influence tolongitudinal strength is very limited. In addition, this influence is notclearly explained in the regulation for the structural strength underlongitudinal bending. In conjunction with this, the influence ofsuperstructure is therefore must be considered. To investigate theinfluence of superstructure on the longitudinal strength of RO-RO ship,the Smith’s method implemented into Beam-HULLST is applied andthe formulation in Beam-HULLST is based on the thin-walled beamtheory. As a simple calculation, the cross section of RO-RO ship istaken to be analyzed. The results obtained by Beam-HULLST with andwithout the superstructure are compared with one another for theinvestigation of the cross section’s progressive collapse behavior.