本文選題：大跨度超高門式結(jié)構(gòu) + AR模型��； 參考：《西安建筑科技大學(xué)》2014年碩士論文

【摘要】：大跨度超高門式結(jié)構(gòu)作為一類特殊的結(jié)構(gòu)形式，其既不同于普通的大跨度結(jié)構(gòu)，也不同于傳統(tǒng)的高聳結(jié)構(gòu)，它是一種體型復(fù)雜的高聳結(jié)構(gòu)，，也是雙塔連體結(jié)構(gòu)的一種形式。由于連體結(jié)構(gòu)的存在改變了結(jié)構(gòu)風(fēng)荷載的分布和結(jié)構(gòu)連體方向的側(cè)向傳力路徑，使得該種結(jié)構(gòu)順風(fēng)向風(fēng)振響應(yīng)不同于一般高聳結(jié)構(gòu)。本文以大跨度超高門式結(jié)構(gòu)為研究對(duì)象，研究了該結(jié)構(gòu)連體方向和垂直連體方向順風(fēng)向風(fēng)振響應(yīng)，找出了結(jié)構(gòu)風(fēng)振響應(yīng)特點(diǎn)，提出了結(jié)構(gòu)風(fēng)振位移響應(yīng)的計(jì)算方法。主要研究?jī)?nèi)容如下： 1、根據(jù)Davenport譜，采用自回歸（AR）法，考慮脈動(dòng)風(fēng)的空間相關(guān)性，應(yīng)用MATLAB編寫程序，得到了結(jié)構(gòu)各個(gè)節(jié)點(diǎn)的脈動(dòng)風(fēng)速時(shí)程曲線、以及各個(gè)節(jié)點(diǎn)的風(fēng)壓時(shí)程曲線。 2、通過SAP2000建立有限元模型，導(dǎo)入AR法生成的風(fēng)壓時(shí)程曲線，對(duì)有限元模型進(jìn)行順風(fēng)向風(fēng)振時(shí)程分析，得到了結(jié)構(gòu)連體方向和垂直連體方向的風(fēng)振位移響應(yīng)。 3、根據(jù)規(guī)范計(jì)算風(fēng)振系數(shù)，求得了靜力等效風(fēng)荷載，算出了等效位移風(fēng)振系數(shù)；應(yīng)用SAP2000對(duì)結(jié)構(gòu)進(jìn)行風(fēng)載時(shí)程分析，得到了位移風(fēng)振系數(shù)；比較了兩個(gè)位移風(fēng)振系數(shù)，進(jìn)而對(duì)規(guī)范計(jì)算得到的風(fēng)振系數(shù)進(jìn)行了修正，并提了出類似結(jié)構(gòu)設(shè)計(jì)所需注意的問題。 4、采用AR法模擬高聳單塔的風(fēng)壓時(shí)程曲線，計(jì)算其風(fēng)振響應(yīng)，并與大跨度超高門式結(jié)構(gòu)的風(fēng)振響應(yīng)進(jìn)行對(duì)比，分析大跨度超高門式結(jié)構(gòu)風(fēng)振響應(yīng)的特點(diǎn)。
[Abstract]:As a special type of structure, the large-span super-high gate structure is not only different from the common large-span structure, but also different from the traditional high-rise structure. It is a kind of complex towering structure and a form of the two-tower conjoined structure. Due to the existence of connected structure, the wind load distribution of the structure and the lateral force transfer path in the direction of the structure are changed, which makes the wind vibration response of this kind of structure different from that of the general high-rise structure. Taking the large-span super-high gate structure as the research object, the wind-induced vibration response of the structure in the connecting direction and the vertical direction is studied. The characteristics of the wind-induced vibration response of the structure are found out, and the calculation method of the wind-induced displacement response of the structure is put forward. The main contents of the study are as follows: 1. According to the Davenport spectrum, the autoregressive method is used to study the spatial correlation of the pulsating wind, and the time history curve of the pulsating wind speed and the wind pressure curve of each node are obtained by using the MATLAB program. 2. The finite element model is established by SAP2000, and the wind pressure time-history curve generated by AR method is introduced into the finite element model. The wind induced displacement response of the structure is obtained in the direction of vertical and contiguous wind through the analysis of the downwind wind vibration time history of the finite element model. 3. According to the standard calculation of wind vibration coefficient, the static equivalent wind load and equivalent displacement wind vibration coefficient are obtained, the wind vibration coefficient of displacement is obtained by using SAP2000 to analyze the wind load time history of the structure, and the two displacement wind vibration coefficients are compared. Furthermore, the wind-induced vibration coefficient calculated by the code is modified, and the problems needing attention in the design of similar structures are put forward. 4. The wind pressure time history curve of tall single tower is simulated by AR method, and the wind-induced vibration response is calculated, and compared with that of large-span ultra-high gate structure, the characteristics of wind-induced vibration response of large-span ultra-high gate structure are analyzed.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU311.3

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