Deformation-Based Design Method of Aluminium Helideck for Eurocode 9

Aluminium alloys are increasingly used in the construction industry, as they offer high strength-to-weight ratios, good durability and ease of fabrication. An aluminium helideck structure should satisfy the requirements of offshore regulations and rule notations such as the Australian/New Zealand Standard and EUROCODE 9, in which the width-tothickness ratio and yield stress are the recognised governing parameters for the design of cross-sections. Aluminium helideck structures are composed of several structural units, which can be aluminium or steel. The aluminium parts are the pancake, girder, safety net, etc. In this study, the aluminium helideck design with the relevant EUROCODE 9 is based on the strength calculation. It may be possible to reduce the calculation time and thus provide a reasonable solution in terms of a practical design. The static and nonlinear collapse behaviour of a developed structure is investigated in this study. The primary aim is to provide a reasonable solution that can improve product quality by checking both strength and deformation criteria. The effect of deflection during the fabrication stage is considered in the structural design based on the newly proposed EUROCODE 9. Lastly, a comparison between the results of this study and those from finite element analysis is presented.