中文摘要：

风重耦合效应是指高耸结构侧向变形受到风和重力共同影响而引起结构静力和动力响应发生变化的现象。为了研究风重耦合效应的作用机理,本文利用结构几何非线性动力方程和等效线性随机振动理论求解。计算结果表明,重刚比是影响风重耦合效应最重要的参数,其值越大,结构振动固有频率越小,结构响应越大。当结构重刚比较小时,地面粗糙度、结构固有阻尼和平均风速对风重耦合效应影响不大。当重刚比较大时,风重耦合效应随结构固有阻尼和平均风速的增大而减小。

英文摘要：

Wind-gravity coupling effect（ WGCE） is a phenomenon that static and dynamic responses of high-rising structure acted by wind and gravity are changed. In order to study mechanism of WGCE,the method about nonlinear dynamic equation and equivalent linear random vibration theory is used to solve the problem. Calculated result indicates that gravity-rigidity ratio is an important parameter for WGCE. Natural frequency of structure decreases and response of structure increases with gravity-rigidity ratio of structure. Ground roughness,natural damping and average wind speed little impact on WGCE as value of gravity-rigidity ratio is small. While value of gravity-rigidity ratio is large,WGCE decreases with natural damping and average wind speed.