琼州海峡大桥桥址风雨特征现场观测研究

发布时间：2018-01-24 12:55

本文关键词： 琼州海峡大桥现场观测风特征参数雨量风参数模型　出处：《湖南科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着新材料、新技术、新工艺的不断进步，21世纪世界桥梁将实现新型、大跨、轻质和美观的发展新目标。大跨柔性特大型桥梁，特别是地处沿海台风带的特大桥梁，风-雨耦合对桥梁的作用可能成为不可忽略的因素，风-雨耦合作用主要表现为风驱雨对结构的直接冲击作用以及风-雨-结构三相耦合对结构气动特性的影响。本文以琼州海峡跨海特大桥作为研究背景，对沿海地区桥址的风雨特征展开了相关研究。本文主要工作包括： 1、对国内外风雨观测研究现状进行了综述。 2、以琼州海峡大桥为工程背景，，设计了风、雨环境现场观测系统，并进行了长期观测，获得桥址处风、雨观测数据。 3、提出了风、雨特征提取方法，编制了相应的MATLAB程序。选取韦森特、启德、山神三次台风作为研究对象，得到了三次台风的平均风速、脉动风速、风向、风剖面指数、紊流度、阵风因子、风功率谱、雨量等风雨特征参数。 4、采用概率论与数理统计方法，分别对韦森特、启德、山神三次台风的10分钟平均风速、风攻角、紊流度、阵风因子等风特征统计模型、雨特征统计模型以及风参数与雨量关系进行了研究。
[Abstract]:With the continuous progress of new materials, new technology and new technology, the world bridge in the 21st century will realize the new development goal of new type, large span, light weight and beautiful appearance. Especially for the large bridge located in the coastal typhoon belt, the effect of the wind-rain coupling on the bridge may become a factor that can not be ignored. The wind-rain coupling is mainly the direct impact of wind-driven rain on the structure and the effect of wind-rain-structure three-phase coupling on the aerodynamic characteristics of the structure. In this paper, the Qiongzhou Strait cross-sea bridge is taken as the research background. The wind and rain characteristics of bridge sites in coastal areas are studied. The main work of this paper is as follows: 1. The present situation of wind and rain observation at home and abroad is summarized. 2. Taking Qiongzhou Strait Bridge as the engineering background, the field observation system of wind and rain environment is designed, and long-term observation is carried out, and the observation data of wind and rain at the bridge site are obtained. 3. The method of extracting wind and rain features is put forward, and the corresponding MATLAB program is compiled. Three typhoons, Vicente, Qide and Shanshen, are selected as the research objects, and the average wind speed of the three typhoons is obtained. Fluctuating wind speed, wind direction, wind profile index, turbulence, gust factor, wind power spectrum, rainfall and other wind characteristics. 4. By using probability theory and mathematical statistical method, the statistical models of wind characteristics such as mean wind speed, angle of attack, turbulence and gust factors of three typhoons, Vicente, Qide and Shanshen, were analyzed respectively. The statistical model of rain characteristics and the relationship between wind parameters and rainfall are studied.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442

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