大跨度超高门式结构风振研究与分析

发布时间：2018-05-08 06:13

本文选题：大跨度超高门式结构 + AR模型　；参考：《西安建筑科技大学》2014年硕士论文

【摘要】：大跨度超高门式结构作为一类特殊的结构形式，其既不同于普通的大跨度结构，也不同于传统的高耸结构，它是一种体型复杂的高耸结构，，也是双塔连体结构的一种形式。由于连体结构的存在改变了结构风荷载的分布和结构连体方向的侧向传力路径，使得该种结构顺风向风振响应不同于一般高耸结构。本文以大跨度超高门式结构为研究对象，研究了该结构连体方向和垂直连体方向顺风向风振响应，找出了结构风振响应特点，提出了结构风振位移响应的计算方法。主要研究内容如下： 1、根据Davenport谱，采用自回归（AR）法，考虑脉动风的空间相关性，应用MATLAB编写程序，得到了结构各个节点的脉动风速时程曲线、以及各个节点的风压时程曲线。 2、通过SAP2000建立有限元模型，导入AR法生成的风压时程曲线，对有限元模型进行顺风向风振时程分析，得到了结构连体方向和垂直连体方向的风振位移响应。 3、根据规范计算风振系数，求得了静力等效风荷载，算出了等效位移风振系数；应用SAP2000对结构进行风载时程分析，得到了位移风振系数；比较了两个位移风振系数，进而对规范计算得到的风振系数进行了修正，并提了出类似结构设计所需注意的问题。 4、采用AR法模拟高耸单塔的风压时程曲线，计算其风振响应，并与大跨度超高门式结构的风振响应进行对比，分析大跨度超高门式结构风振响应的特点。
[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.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU311.3

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