大跨度梯形钢屋架双坡屋盖风振响应和风振系数研究

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STUDY OF WIND-INDUCED VIBRATION RESPONSES AND WIND-INDUCED VIBRATION FACTOR FOR LONG-SPAN GABLE ROOFS SUPPORTED BY STEEL TRUSSES

1.
1. Xi’an University of Architecture and Technology,Xi’an 710055,China;
2.
2. Xi’an Branch of SCIEG Beijing Huayu Engineering Co. Ltd,Xi’an 710061,China;
3.
3. Northwest Electric Power Design Institute,Xi’an 710075,China

摘要: 基于随机振动理论，在频域内采用风力谱分析法进行大跨度梯形钢屋架双坡屋盖随机振动分析，用Davenport风速谱计算屋盖的风振响应和风振系数。讨论基本风压、屋盖跨度、屋盖重量、阻尼比、地貌类别和支座约束等参数对风振系数的影响，利用参数分析的结果，归纳出大跨度梯形钢屋架双坡屋盖风振系数实用公式。
- 大跨度双坡屋盖 /
- 谱分析法 /
- 风振响应 /
- 风振系数 /
- 实用公式
Abstract: Based on random vibration theory,a wind power spectral analysis method in the frequency domain was used to analyze the wind induced vibration of long-span gable roofs supported by steel truss in this paper.The Davenport wind spectrum was used to calculate wind-induced vibration responses and wind vibration factor of the gable roofs.The influences of parameters such as the basic wind pressure,span and weight of the roof,damping ratio,terrain categories and support restraints,and etc on the wind vibration factor were discussed.Using results of the parametric analysis,a practical wind-induced vibration factor formula for long-span steel truss supporting gable roofs was summarized and recommeded.
- long-span gable roof /
- spectral analysis /
- wind-induced vibration response /
- wind-induced vibration factor /
- practical formula