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| 大跨度平屋盖表面的风压脉冲特性研究 | |
| 引用本文： | 孙瑛,武岳,林志兴,沈世钊.大跨度平屋盖表面的风压脉冲特性研究[J].工程力学,2007,24(4):92-96. |
| 作者姓名： | 孙瑛 武岳 林志兴 沈世钊 |
| 作者单位： | 1. 哈尔滨工业大学土木工程学院,黑龙江,哈尔滨,150090 2. 哈尔滨工业大学土木工程学院,黑龙江,哈尔滨,150090;同济大学土木工程防灾国家重点实验室,上海,200092 3. 同济大学土木工程防灾国家重点实验室,上海,200092 |
| 基金项目： | 国家自然科学基金 , 国家自然科学基金 |
| 摘 要： | 大跨度平屋盖表面的风压脉冲特性是屋盖风压脉动特性的一个重要表现形式,基于大跨度平屋盖结构的风洞试验研究,结合风压脉冲的形成机理及利用过界峰值法研究屋盖表面风压脉冲对风压脉动的贡献及其出现的频率和峰值的大小,并从中找出反映大跨度屋盖结构的风场绕流特性和风压脉动特性的一些规律。 |
| 关 键 词： | 大跨度屋盖结构 风荷载 漩涡作用 风压脉冲 过界峰值法 |
| 文章编号： | 1000-4750（2007）04-0092-05 |
| 修稿时间： | 2005-08-252005-11-17 |
CHARACTERISTICS OF PEAK SURFACE PRESSURES ON LONG SPAN FLAT ROOFS |
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| SUN Ying,WU Yue,LIN Zhi-xing,SHEN Shi-zhao.CHARACTERISTICS OF PEAK SURFACE PRESSURES ON LONG SPAN FLAT ROOFS[J].Engineering Mechanics,2007,24(4):92-96. | |
| Authors: | SUN Ying WU Yue LIN Zhi-xing SHEN Shi-zhao |
| Affiliation: | 1. School of Civil Engineering, Harbin Institute of Teclmology, Harbin, Heilongjiang 150090, China; 2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China |
| Abstract: | Characteristic of wind pressure pulse is one of the most important behaviors of wind pressure fluctuation. Peak surface pressures measured on wind tunnel test models of long span flat roofs are discussed. The peak-over-threshold method is used to investigate the properties of wind pressures pulse events, which include peak duration, energy contribution, number of the peak events, and the distribution of average peak pressure. The results show that there existed strong non-Gaussian roof pressure in the flow separation region and that the amplitude of peak pressure events could reach four times of the average wind pressures. Some conclusions about the characteristics of wind fluctuating pressure are obtained from these results. |
| Keywords: | long span roof wind load vortex mechanism wind pressure pulse peak-over-threshold method |
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