高耸结构驰振分析

Analysis of Galloping Oscillations of Highrise Structures

结合我国规范，提出高耸结构稳态驰振响应和驰振临界风速分析方法。并根据风洞试验提供的气动参数着重分析了矩形横截面高耸结构的驰振，得到了正方形和长宽比为２∶１的矩形横截面高耸结构稳态驰振响应计算公式，及驰振发生与突变的临界条件。最后，应用本文方法计算了一矩形横截面高耸结构的驰振响应和临界风速，得到了一些对工程设计很有意义的结论。

Based on related references,an analytical method for evaluating steady responses and critical wind velocities of galloping oscillations of highrise structures is presented according to China′s code.Meanwhile,galloping oscillations of highrise structures with rectangular cross section are studied in particular in the light of aerodynamic data offered by wind tunnel tests,and formulas to calculate galloping responses and critical conditions to decide onset and jump of galloping oscillations are obtained for highrise structures of square and rectangular cross section with side ratio of 2∶1.Finally,the responses and critical wind velocities of galloping oscillations of a highrise structure with rectangular cross section are calculated by the new method,and some important conclusions helpful for engineering design are drawn.