A 2-D forced-vibration driver for ADs identification of long-span bridge section-model has been developed, by which the section-model is forced to perform 1-D or coupled torsional/vertical sinusoidal motion. In each test, lift force and torsional moment are both measured by force balances, the motions of the model are measured by accelerators, then the eight ADs are obtained by a hybrid method of spectrum analysis and non-linear optimization. The results of a flat plate sectional model obtained in wind tunnel tests by this driver are compared with the solutions of Theodorson flat plate and other published datas,the comparison shows that all of the datas share the same trends.