【摘要】 介绍崖门大桥施工阶段3个抗风不利状态———独塔状态、最大双悬臂状态以及最大单悬臂状态下结构的抖振响应时域分析过程,其中在计算主梁气动力时考虑了气动导纳函数的影响,并修正了准定常假定下的气动力列式,使之能在一定程度上反映主梁断面气动导数的影响。数值计算结果与风洞试验结果基本吻合,说明此方法的正确性与实用性。并对有关结果进行了讨论,得出若干结论。更多还原

【Abstract】 This paper presents the process of time domain analysis of structural buffeting responses of Yamen Bridge at erection stage under three kinds of adverse wind resistance situations of single pylon, maximum twoside cantilevers and maximum oneside cantilever, in which the influences of admittance functions are considered when aerodynamics of the girder is calculated and the relevant formulations of aerodynamics under the quasicommon assumptions are modified to make them represent the influences of the derivations of the aerodynamics of the girder sections to some extent. The numerical results are agreeable with the wind tunnel test results on the whole, which proves that the method described in the paper is correct and practicable. In the paper, some of the results are discussed and conclusions thereof are drawn as well.更多还原