作　　者： ; ; ;

机构地区： 西安交通大学建筑工程与力学学院

出　　处： 《工程力学》 2004年第1期98-101,共4页

摘　　要： 应用精细时程积分方法对高耸结构驰振运动方程进行了分析,并确定了驰振临界风速。首先应用模态坐标变换得到系统无耦合的运动方程,然后应用精细积分法计算结构的时程响应,再根据结构响应的对数衰减率判断结构的临界风速。最后,通过计算一个矩形截面高耸结构的驰振临界风速验证了方法的正确性。 The danger of galloping oscillation of a high-rise structure is not negligible. The precise time-integration is used in this paper to decide critical wind velocity of galloping oscillation of high-rise structures. Firstly, modal transformation is carried out to decouple the vibration equations. Then, the time history of structural response is computed by using precise time integration method. According to the logarithmic decrement of the time history response, the critical state is estimated. Finally, the validation of the present method is studied through an example in which the critical wind velocity of galloping oscillations of a high-rise structure with rectangular cross section is computed.

关 键 词： 高耸结构 驰振 精细时程积分法 临界风速

领　　域： [建筑科学]