站台雨棚脉动风压特性及参振模态分析

Analysis of Fluctuating Wind Pressure Characteristics of a Kind of Platform Canopies

站台雨棚属于大跨结构,上下表面均受到风荷载作用并且其表面风荷载分布也是较为复杂的。分析了某站台雨棚均方根风压系数、上下表面风压相关性以及分析和探讨了采用频域分析法计算大跨度悬挑屋盖风振响应时应考虑的结构模态数和频率范围。得到一些有意义的结论,为结构设计选型提供参考。

The platform canopies belongs to long span structures , there is wind pressure on their upper and lower surfaces and the distribution of wind pressure on their upper and lower surfaces is also complicated. In this paper, the characteristics of wind pressure on canopies are analyzed, which involve the RMS wind pressure coefficients, the correlation coefficients of wind pressures on their upper and lower surfaces and the mode number and the frequencies range, which were considered during calculating the wind-induced responses of large cantilevered roof by using the method of frequency domain , were analyzed and discussed. Some useful conclusions are obtained, which supply references for design of structures and selection of structure forms.