• Second-order inelastic analysis and refined plastic-hinge concepts became the core framework for steel-frame design, replacing purely elastic-plastic hinges with methods that capture second-order effects, stability, and realistic member behavior. Key works: Part I and II on refined plastic-hinge analysis, three-dimensional frame studies, and related investigations [4][3][6][7][5].

• Advanced finite-element modeling strategies enable efficient nonlinear analysis of plates, shells, and stiffened boxes via super-element formulations, curved-beam elements, and overlapping hinge concepts, offering improved accuracy and convergence across complex ship structures [20][19][18][9].

• Reliability, fitness-for-purpose, and risk-based assessment frameworks address uncertainty in existing vs new ship/offshore structures, linking probabilistic checks, safety factors, and maintenance planning to practical design and operation [14][16][1].

• Buckling and stability phenomena in steel members, including distortional buckling of tapered sections and local flange buckling, are studied alongside effects of semi-rigid connections on overall stability and performance [2][13][8].