Details

Autor(en) / Beteiligte

• Arkinstall, M
• Carfrae, T

Titel

Structural Design and Optimisation of the Beijing National Olympic Swimming Centre

Ist Teil von

• Australian journal of structural engineering, 2006-01, Vol.6 (3), p.181-190

Ort / Verlag

Routledge

Erscheinungsjahr

2006

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The design of the Beijing National Olympic Swimming Centre involved finding a strength design solution for the 22,000 beam wall and roof structure whilst minimising the structural steel weight. Both global and local optimisation techniques were employed in determining this strength design solution. Each member cross section represents a design variable, while the strength utilisations for each member for a given load combination and strength check equation represent a design constraint. Due to the large number of design constraints and variables, gradient methods of optimisation were not feasible for optimisation of this structure. A method of constraint satisfaction optimisation using discrete variables was developed and employed for the global structure design, resulting in significant steel tonnage reduction. The automated procedure is presented in this paper. The discrete variable choices for member cross sections were determined by using simulated annealing optimisation techniques to maximise strength of cross sections per kg of steel. Three groups of discrete variables were generated for the three different parts of the building using this method (surface member, edge member, internal member). The global constraint satisfaction optimisation procedures then used these optimised cross section groups Investigation of the use of stiffened cross sections instead of compact cross sections was also considered in the design process as a method of reducing steel tonnage. The effectiveness of stiffened cross sections loaded plastically in seismic regions is discussed.