Study on structural performance and design of single-layer folded-plane spatial reticulated structure

The load-carrying capacity and failure mechanism of single-layer folded-plane spatial reticulated structure,associated with the key design problems of main stadium in Shenzhen Universiade Sport Center are studied.Based on numerical analysis in the stiffness control,dynamic characteristic,failure mechanism,and load-carrying capacity of the structure,the conclusions are drawn,which indicate that the structural stiffness can be increased by one of the following measures,namely amplifying the bending stiffness of radial trusses,enlarging the rise-to-span ratio of folded plate unit in the roof and elevation,and adding circumferential members at the shoulder valley in the structure.It is also proposed that the welding quality of the joints should be controlled carefully to which primary members subjected to both tension and bending are connected,for it has great influence on the load-carrying capacity.With rational and careful structural design,a single-layer folded-plane spatial reticulated structure can have sufficient integral structural stiffness,high load-carrying capacity and good ductility.Meanwhile the overall collapse can be prevented in the case of failure of key members.