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中文摘要：
在对现有桥梁抖振分析理论及计算斜风作用的方法进行总结的基础上，结合大跨度桥梁结构健康监测系统（SHMS）中风速仪实测风特性数据的特点对平均风分解法进行改进，使得风速分解过程更为准确、便捷，据此发展一套基于ANSYS平台计算斜风作用下大跨度桥梁抖振响应的时域分析方法。其中主梁气动自激力以导出的单元气动刚度和气动阻尼矩阵进行模拟，根据主梁断面的颤振导数以及实测风速数据来确定单元气动刚度和气动阻尼矩阵的参数，由此获得专用于抖振分析的大跨度桥梁有限元计算模型。在此基础上联合采用MATLAB和ANSYS平台编制了全部的相关计算程序，从而实现直接由SHMS实测风环境数据得到结构的抖振响应，并以实测“麦莎”台风为例进行斜风作用下润扬悬索桥抖振响应的时域数值计算。
英文摘要：
Current theories and calculation methods for buffeting response analysis of bridges under oblique winds are summarized, and the traditional wind decomposition approach of analyzing the buffeting response of long span bridges under oblique winds is modified by combining with the characteristics of the measurement data recorded by SHMS, with more accuracy and convenience. A simplified method of buffeting response time-domain analysis for long span bridges under oblique winds is developed by using the modified wind decomposition approach and ANSYS. The aerodynamic self- excited force is simulated by using derived aerodynamic rigidity and damp matrix of the bridge deck elements, with the coefficients determined by the flutter derivatives of the bridge deck section and the measured wind speed. The above methods are coded by using MATLAB and ANSYS, and the buffeting response of a bridge can be directly obtained through the wind characteristic measurement data from SHMS. Using typhoon Matsa as an example, the method is employed to analyze the buffeting response of the Runyang Suspension Bridge （RSB） under the oblique wind.
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