發(fā)布時間：2018-06-27 03:15

  本文選題：斜拉橋 + 動力特性�。� 參考：《大連理工大學》2014年碩士論文

【摘要】：橋梁工程是交通工程的咽喉。在我國,伴隨著經(jīng)濟的快速發(fā)展,一躍成為全球第二大經(jīng)濟體的同時,交通運輸業(yè)得到了極大的發(fā)展,交通網(wǎng)絡遍及全國,這是經(jīng)濟增長的結(jié)果,同時也是經(jīng)濟增長快速平穩(wěn)發(fā)展的前提。而且,促進文化交流,加強民族團結(jié),縮小地區(qū)差距,鞏固國防等,也有很重要的意義。 斜拉橋是一種拉索體系,它的出現(xiàn)實現(xiàn)了橋梁的大跨型的轉(zhuǎn)變,在跨徑方面更優(yōu)于梁式橋,在經(jīng)濟快速發(fā)展的今天,是一種常見的橋型。目前為止,斜拉橋由于其跨越能力大,傳力路徑明確,結(jié)構(gòu)受力性能強,抗震性能好,再加上其獨特的經(jīng)濟和建筑造型的優(yōu)點,使得斜拉橋較之其他橋型在競標上占據(jù)上風,得到業(yè)界的廣泛關注,并已被廣泛應用于橋梁工程。 盤錦遼東灣新區(qū)連島東橋坐落于“在鹽堿荒灘上催生出”的遼東灣新區(qū),跨徑335米,是一座主跨采用正交異性鋼橋面板鋼箱梁、索塔為外形貌似天鵝的“頭部”和“頸部”的空間結(jié)構(gòu)、結(jié)構(gòu)上較為復雜、具有獨特造型的單塔空間索面鋼斜拉橋。 本文以盤錦遼東灣新區(qū)連島東橋為工程背景,主要研究內(nèi)容包括以下幾個方面： (1)首先介紹了大跨度橋梁抗震理論的發(fā)展概況,并介紹和討論了在橋梁抗震方面的幾種研究方法； (2)利用Midas/Civil軟件,并且參考相關規(guī)范,將東橋各部分進行有限元建模以及動力特性分析,分析該橋的模型的振動特性； (3)在模態(tài)分析的基礎上,根據(jù)橋址地形資料和規(guī)范細則的抗震設計要求,選用Senfer-t波作為地震動輸入,進行在該地震波激勵下(縱向+豎向組合)的空間地震時程響應分析； (4)應用抗震理論,通過軟件對東橋進行減隔震措施的模型建立,并將該橋的計算結(jié)果與未采用減隔震措施的計算結(jié)果進行分析對比,并同采取固結(jié)方式的橋梁模型在內(nèi)力方面進行比較,得出相關結(jié)論。通過對該斜拉橋在地震作用下表現(xiàn)出的性能,能夠在今后的橋梁抗震設計方面作為參考資料。
[Abstract]:Bridge engineering is the throat of traffic engineering. In China, with the rapid development of the economy, the transportation industry has been greatly developed while it has become the second largest economy in the world, and the transportation network has spread all over the country, which is the result of economic growth. At the same time is also the premise of rapid and steady economic growth. Moreover, it is also of great significance to promote cultural exchanges, strengthen national unity, narrow regional disparities and consolidate national defense. The cable-stayed bridge is a kind of cable system, which realizes the transformation of the long-span type of the bridge, and is better than the girder bridge in the aspect of span. It is a common bridge type in the rapid development of economy today. So far, the cable-stayed bridge has the advantages of large span ability, clear transmission path, strong mechanical performance, good seismic performance, and its unique economic and architectural advantages, which makes the cable-stayed bridge have the upper hand in competitive bidding compared with other bridge types. Has been widely concerned by the industry, and has been widely used in bridge engineering. Liandao East Bridge of Panjin Liaodong Bay New area is located in the new area of Liaodong Bay, with a span of 335 meters. It is a steel box girder with orthotropic steel bridge face slab. The cable-tower is a kind of spatial structure of "head" and "neck" which looks like a swan. The structure is more complicated and has a unique shape of single tower space cable plane steel cable-stayed bridge. This paper takes Liandao Dongqiao Bridge of Panjin Liaodong Bay New area as the engineering background. The main research contents include the following aspects: (1) the development of seismic theory of long-span bridge is introduced firstly. Several research methods of bridge seismic resistance are introduced and discussed. (2) using Midas / Civil software and referring to relevant codes, the finite element modeling and dynamic characteristic analysis of each part of the bridge are carried out. The vibration characteristics of the model of the bridge are analyzed. (3) based on the modal analysis, Senfer-t wave is selected as the input of ground motion according to the seismic design requirements of the topographic data of the bridge site and the specifications. The spatial seismic time-history response analysis under the excitation of the seismic wave (longitudinal vertical combination) is carried out. (4) the seismic theory is applied to establish the model of the isolation measures for the east bridge by software. The calculated results of the bridge are compared with those of the bridge without seismic isolation, and the results are compared with the internal force of the bridge model with the consolidation method, and the relevant conclusions are drawn. Through the performance of the cable-stayed bridge under earthquake action, it can be used as a reference for the seismic design of the bridge in the future.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U442.55

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本文編號：2072455