首先介绍一种高效的用于大跨度桥梁风致振动分析的风场模拟方法 ,在此基础上进一步给出大跨度桥梁抖振力和自激力时域表达式 .运用本文理论对香港汀九大桥进行了风场模拟和气动力计算 ,据此完成了大桥的抖振响应时程分析 .有关计算结果与风洞试验结果相当吻合 ,说明了本文方法的正确性与实用性 Firstly, an efficient wind-field simulation method for wind-induced vibration analysis of long-span bridges is introduced, and on the basis of this, the time-domain expressions of buffeting force and self-excitation of long-span bridges are given.Using the theory of this paper, The wind field simulation and aerodynamic calculation are carried out, and the time-history analysis of the buffeting response of the bridge is completed.The calculation results are in good agreement with the wind tunnel test results, which shows the correctness and practicability of the method