Study on roof structure selection and tensioning experiment of the Dalian Suoyuwan Football Stadium

To select the economical and rational structural form for Dalian Suoyuwan Football Stadium, comparative analysis of three schemes was conducted:the double-layer orthogonal wheel-spoke cable structure, the upper-layer crossed wheel-spoke cable structure, and the double-layer crossed wheel-spoke cable structure. The results reveal that the upper-layer crossed wheel-spoke cable structure demonstrates better economical and mechanical advantages, which makes it the final structural system adopted for Dalian Suoyuwan Football Stadium. To investigate the feasibility of the tensioning construction scheme for the upper-layer crossed wheel-spoke cable structure, a 1∶20 scaled experimental model was designed and fabricated. The tensioning experiment was performed, and the tensioning process was further analyzed using the nonlinear finite element method. The results indicate that the experiment can accurately simulate the actual tensioning process, the construction scheme established based on ground assembly and overall lifting is feasible because of the stable and controllable process, and the traction lengths of active cables for experiment can serve as valuable references for practical construction.