ABSTRACT
In this paper, structure design of a spherical reticulated shell at the top of a circular pool is described. The biting + sunflower hybrid grid shows that the structure has a span of 44 m and height of 7.5 m, which is about 1/6 of the span. It adopts the embedded hub node, with fixed hinge support on top of the tank wall. The reticulated shell uses a cold bending thin-waledl rectangular steel tube, with the steel type Q235C. As a result of the embedded hub nodes, the connection between the network shell bars just outside the shell surface contact and the inner surface of the shell can be considered to be articulated, and the model will be calculated according to rigid connection. All bar specification is 120 × 80 × 4. The bar slenderness ratio is 150. The basic wind pressure is 0.7 kN/m2 and the basic snow pressure is 0.5 kN/m2. Temperature changes of + 20 and 50°C are considered. The calculation model is shown in Figure 1.
