本文選題：斜拉橋　切入點：空間扭索面　出處：《長安大學》2015年碩士論文

【摘要】：斜拉橋自誕生以來為人類的交通發(fā)展帶來很多便利,其跨越能力已經成為幾乎和懸索橋相媲美的第二類橋型。近幾年來,空間扭索面斜拉橋作為一種優(yōu)美的橋型備受人們的青睞,其獨特的布索方式給觀賞者帶來視覺上空間的美感,改變了以往斜拉橋單調的布索方式。然而,這種橋型同樣具有斜拉橋本身不可避免的問題:拉索的銹蝕損傷。拉索作為斜拉橋的重要受力構件,其承載力對大橋的結構安全性至關重要,但是由于拉索自身及其所處的工作環(huán)境,使得運營多年的斜拉橋因拉索的銹蝕損傷而面臨著換索的問題�？臻g扭索面斜拉橋作為一種新的橋型,在運營多年以后同樣不可避免的需要進行拉索的更換。然而,目前國內外對這橋型的結構性能研究較少,如何對其進行換索同樣需要更多的研究。本文在對普通斜拉橋換索方法的分析總結基礎上,對空間扭索面斜拉橋進行換索方案的研究對比。首先,本文介紹了斜拉橋的一些布索方式和其結構的特性,并闡述了目前斜拉橋的換索理論及方法;其次,本文就空間扭索面斜拉橋自身的特點,初定其整體的換索方案;最后,本文選定四種換索方案對空間扭索面斜拉橋進行對比分析得出:方案四采用同時對稱更換四根拉索和同時對稱更換兩根拉索交替的換索方法,在主跨靠近支座處采用同時更換四根拉索的方法進行換索;在跨中主梁位移變化較敏感的索段,采用一次對稱更換兩根拉索的方法換索;在靠近橋塔的處再同時對稱更換四根拉索。這種交替的換索方法,既不對主梁的變形和內力產生較大的影響,又加快了施工進度,因此本文推薦使用方案四對本文的空間扭索面斜拉橋進行拉索的更換。
[Abstract]:The cable-stayed bridge has brought a lot of convenience to the development of human transportation since its birth, and its span ability has become the second type of bridge almost comparable to the suspension bridge.In recent years, as a kind of beautiful bridge type, the cable-stayed bridge with spatial twisting cable plane is favored by people. Its unique cable-style brings the aesthetic feeling of visual space to the viewer, and changes the monotonous cable-style of the cable-stayed bridge in the past.However, this type of bridge also has the inevitable problem of cable-stayed bridge itself: corrosion damage of cables.As an important bearing member of cable-stayed bridge, the bearing capacity of cable is very important to the safety of the bridge, but because of the cable itself and its working environment,The cable-stayed bridge which has been in operation for many years is faced with the problem of cable replacement due to the corrosion damage of the cables.As a new type of bridge, cable-stayed bridge with space torsional cable plane is inevitable to be replaced after many years of operation.However, there is little research on the structure performance of this bridge at home and abroad, and more research is needed on how to change the cable.On the basis of analyzing and summarizing the cable changing methods of ordinary cable-stayed bridge, this paper studies and compares the cable-changing schemes of space torsional cable-plane cable-stayed bridge.First of all, this paper introduces some cable-style and structural characteristics of cable-stayed bridge, and expounds the theory and method of cable-changing of the cable-stayed bridge at present, secondly, this paper, according to the characteristics of the spatial cable-plane cable-stayed bridge, initially determines the whole scheme of cable-changing.Finally, this paper selects four cable-changing schemes to compare and analyze the cable-stayed bridge with space torsional cable plane. The conclusion is as follows: scheme four adopts the method of replacing four cables symmetrically at the same time and replacing two cables alternately at the same time.The method of replacing four cables simultaneously at the position of the main span near the support, and the method of replacing two cables symmetrically in the section of cable which is sensitive to the displacement change of the main beam in the span, is adopted.At the same time, the four cables are symmetrically replaced near the bridge tower.This alternate cable exchange method has no great influence on the deformation and internal force of the main beam, and accelerates the construction progress. Therefore, this paper recommends the use of scheme four to replace the cables of the cable-stayed bridge with space torsional cable plane in this paper.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U448.27;U445.7

【共引文獻】

相關期刊論文 前10條

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本文編號：1722333