ROOF STEEL STRUCTURAL DESIGN OF SAMOA AQUATIC CENTER

The roof of Samoa Aquatic Center is a complex hyperboloid.The roof structure is run-through steel truss composed of circular or rectangular hollow section steel tubes.Some curves are built to form the double-curved surface of the roof.A great lot of bracing members are arranged in the steel structure of roof because the wind load amounts to 1.89 kN/m2 in this area.At the same time,the shear force of main truss support joint is large,which is out of the requirements of code.The three-dimensional finite-element model is established and calculation is repeated.The result shows that the arrangement of structure and bracing satisfy the requirements of safety and economy.The sloping platform above the RC column is taken to transform part of the shear force of the main truss support to lift or compression force.As a result,the shear value can satisfy the requirements of calculation and construction.According to the requirements of calculation result,transportation and installation,several important joints are designed based on above results.