Wind vibration coefficient of long-span spatial structures with self-oscillating of roof and fluid-structure coupling effect

The influences to the wind vibration coefficients brought by self-oscillating effect of roof and fluid-structure coupling effect were studied in the paper. The efficiency and precision of different wind numerical simulation methods were compared and then the appropriate method for wind vibration analysis of long-span spatial structure was adopted. The calculating formulas were derived with self-oscillating effect of roof and fluid-structure coupling effect respectively. The wind vibration coefficients of the roof structure of the Tianjin Olympic Stadium and a single-layer reticular shell of a gymnasium, both of which are long-span spatial structures, were analyzed. The calculation results show that the wind vibration coefficients increase with self-oscillating effect of roof, while they decrease with fluid-structure coupling effect. The wind-structure coupling effect plays a main part, while the wind-roof coupling effect which could be neglected has little influence. The influences, which are brought by self-oscillating effect of roof and fluid-structure coupling effect respectively, can not be canceled out by each other, and the degree of influence varies with different structures.