臺風特征參數(shù)及風雨聯(lián)合概率模型研究
發(fā)布時間：2018-08-21 07:46
【摘要】：隨著建筑結(jié)構(gòu)的細長化和輕柔化,風荷載成為了大跨度高聳、柔性結(jié)構(gòu)的重要動荷載之一,而動力風荷載的確定是很復雜和困難的。在確定風荷載對結(jié)構(gòu)的影響前,首先必須了解當前結(jié)構(gòu)所處風場的基本特性,為了準確研究橋梁風載特性,根據(jù)建造在臺風登陸區(qū)域的瓊州海峽大橋南岸橋址觀測站的實時觀測,獲取了2012年-2014年登陸瓊州海峽10余次臺風的風速時程。對基本的風參數(shù)進行了詳細分析,并用數(shù)理統(tǒng)計的方法建立了相關(guān)的概率模型,為今后橋梁的設(shè)計運營提供參考。研究內(nèi)容和成果包括:(1)對風工程的現(xiàn)場實測研究的發(fā)展歷史及其取得的成果做了簡要回顧,介紹了風致振動控制的機理和研究現(xiàn)狀,并對風雨聯(lián)合概率模型的研究必要性及研究方法做了簡要介紹。(2)臺風特性觀測,介紹了本文為臺風特性觀測所用的儀器和對實際臺風過程的觀測情況。(3)詳細介紹了強臺風“威馬遜”登陸過程的風參數(shù)變化,然后分別分析了不同風參數(shù)隨時間變化的相關(guān)性和不同地貌條件下風參數(shù)之間的相關(guān)性研究。(4)將10次臺風觀測數(shù)據(jù)進行統(tǒng)計分析,建立了各個風參數(shù)的概率分布模型并給出了其數(shù)學表達式,對不同風參數(shù)之間進行了相關(guān)性分析,得到了一些定性的結(jié)論。(5)以瓊州海峽大橋橋址處風速、雨量實測數(shù)據(jù)為基礎(chǔ),研究了基于Copula函數(shù)的理論方法構(gòu)建的風速和對應(yīng)雨量的風雨聯(lián)合概率分布模型,并對聯(lián)合重現(xiàn)期和同現(xiàn)重現(xiàn)期進行了預測為將來的工程設(shè)計提供參考。
[Abstract]:With the tenderness and softness of the building structure, the wind load becomes one of the important dynamic loads of the large span towering and flexible structures, and the determination of the dynamic wind load is very complicated and difficult. Before determining the influence of wind load on the structure, it is necessary to understand the basic characteristics of the wind field in the current structure, in order to study the wind load characteristics of the bridge accurately. Based on the real time observation of the south bank of Qiongzhou Strait Bridge built in the typhoon landing area, the wind speed time history of more than 10 typhoons landing in the Qiongzhou Strait from 2012 to 2014 was obtained. The basic wind parameters are analyzed in detail, and the related probability model is established by mathematical statistics, which provides a reference for the design and operation of bridges in the future. The research contents and achievements are as follows: (1) A brief review of the development history and achievements of the field measurement of wind engineering is made, and the mechanism and research status of wind-induced vibration control are introduced. The necessity and method of research on the combined probability model of wind and rain are briefly introduced. (2) observation of typhoon characteristics, This paper introduces the instruments used for the observation of typhoon characteristics and the observation of the actual typhoon process. (3) the variation of wind parameters in the landing process of strong typhoon "Wilmson" is introduced in detail. Then, the correlation of different wind parameters with time and the correlation between wind parameters under different geomorphological conditions are analyzed respectively. (4) the observed data of 10 typhoons are statistically analyzed. The probability distribution model of each wind parameter is established and its mathematical expression is given. The correlation analysis between different wind parameters is carried out, and some qualitative conclusions are obtained. (5) based on the measured data of wind speed and rainfall at the bridge site of Qiongzhou Strait Bridge, The combined probability distribution model of wind speed and rain corresponding to rainfall is studied based on the theory and method of Copula function, and the prediction of joint recurrence period and co-occurrence recurrence period is provided as a reference for future engineering design.
【學位授予單位】：湖南科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U442
[Abstract]:With the tenderness and softness of the building structure, the wind load becomes one of the important dynamic loads of the large span towering and flexible structures, and the determination of the dynamic wind load is very complicated and difficult. Before determining the influence of wind load on the structure, it is necessary to understand the basic characteristics of the wind field in the current structure, in order to study the wind load characteristics of the bridge accurately. Based on the real time observation of the south bank of Qiongzhou Strait Bridge built in the typhoon landing area, the wind speed time history of more than 10 typhoons landing in the Qiongzhou Strait from 2012 to 2014 was obtained. The basic wind parameters are analyzed in detail, and the related probability model is established by mathematical statistics, which provides a reference for the design and operation of bridges in the future. The research contents and achievements are as follows: (1) A brief review of the development history and achievements of the field measurement of wind engineering is made, and the mechanism and research status of wind-induced vibration control are introduced. The necessity and method of research on the combined probability model of wind and rain are briefly introduced. (2) observation of typhoon characteristics, This paper introduces the instruments used for the observation of typhoon characteristics and the observation of the actual typhoon process. (3) the variation of wind parameters in the landing process of strong typhoon "Wilmson" is introduced in detail. Then, the correlation of different wind parameters with time and the correlation between wind parameters under different geomorphological conditions are analyzed respectively. (4) the observed data of 10 typhoons are statistically analyzed. The probability distribution model of each wind parameter is established and its mathematical expression is given. The correlation analysis between different wind parameters is carried out, and some qualitative conclusions are obtained. (5) based on the measured data of wind speed and rainfall at the bridge site of Qiongzhou Strait Bridge, The combined probability distribution model of wind speed and rain corresponding to rainfall is studied based on the theory and method of Copula function, and the prediction of joint recurrence period and co-occurrence recurrence period is provided as a reference for future engineering design.
【學位授予單位】：湖南科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U442
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