Abstract: Based on an analytical tornado model, a rapid simulation method for translating tornado on bridge site is developed. Two primary simplified analytical methods used in current structural tornado-induced load modeling, the wind velocity decomposition method and the equivalent angle of attack method, are introduced and analyzed. Using the results of numerical tornado wind tunnel simulations as a benchmark, the spanwise distribution and time-history characteristics of wind loading on the streamlined deck of a long-span bridge simulated by the aforementioned two simplified analytical methods are investigated. A time-domain analysis of the dynamic response of streamlined deck subjected to translating tornado impacts is conducted by comparing the applicability of the wind velocity decomposition method and the equivalent angle of attack method. The result indicates that the wind velocity decomposition method only considers the contribution of vertical wind velocity to lift force while neglecting its contribution to torque. The vertical displacement obtained by using this method is overestimated, while the torsional displacement is underestimated. The structural response obtained by the equivalent angle of attack method exhibits a similar trend to the results from numerical tornado wind tunnel simulations, providing a reference for the tornado-resistant design and, the maintenance of long-span bridges.