發(fā)布時間：2018-11-11 20:48

【摘要】：隨著國家對交通事業(yè)的投入增大,大量的匝道橋、互通立交橋和高架橋隨著交通事業(yè)的飛速發(fā)展而被建設,彎梁橋因具備有彎、斜、坡、異形等特點而能靈活地適應實際線路情況,不受復雜線路結構限制,而且還具備有優(yōu)美的線形外觀以及節(jié)省工程占地等優(yōu)點,近年來被運用的越來越廣泛。彎梁橋遠比正交橋梁復雜,在我國發(fā)展相對比較緩慢,隨著國內(nèi)工程界研究學者逐步提高了對彎梁橋的重視,已經(jīng)取得了很大的成就,但目前對彎梁橋受力特性仍存在許多問題有待解決。本文以太原市環(huán)線道路—北中環(huán)至西中環(huán)立交工程第四聯(lián)為背景,利用有限元分析程序,討論了彎梁橋的受力特性及圓心角和支座布置形式對彎梁橋的受力影響,具體內(nèi)容包括以下幾點：1、針對3跨連續(xù)彎箱梁橋工程實例,基于梁格理論分析結構內(nèi)力(包括彎矩、扭矩和剪力)、反力及變形特點,總結了連續(xù)彎箱梁橋的受力特性。2、結合工程實例,建立多個空間梁格模型,控制其他影響參數(shù)不變,取不同的圓心角0°-50°,以10°為一個差度,分析討論了控制截面在不同荷載作用下因圓心角因素對彎矩、扭矩、剪力及反力的影響。3、結合背景工程支座布置形式,控制上部結構不變,研究不同支承形式對彎梁橋內(nèi)力的影響及中墩支座的徑向偏移對支反力的影響。4、根據(jù)彎梁橋的分析理論,對背景工程模型分析結果進行試驗驗證,并通過彎梁橋結構響應特征,對該類彎梁橋的荷載試驗提供一定的建議。
[Abstract]:With the increase of national investment in transportation, a large number of ramps, interchanges and viaducts have been built with the rapid development of the transportation industry. The special-shaped can adapt to the actual line situation flexibly and not be restricted by the complex line structure. It also has the advantages of beautiful line appearance and saving the engineering space. It has been used more and more widely in recent years. Curved beam bridge is much more complex than orthogonal bridge, and its development is relatively slow in China. With the increasing attention paid by domestic engineering scholars to curved beam bridge, great achievements have been made. However, there are still many problems to be solved for the mechanical characteristics of curved girder bridge. In this paper, based on the fourth connection of Taiyuan Ring Road-North Central to West Central Interchange, using finite element analysis program, the force characteristics of curved beam bridge and the influence of center angle and bearing arrangement on the force of curved beam bridge are discussed. The concrete contents include the following: 1. Based on the theory of beam lattice, the internal force (including moment, torque and shear force), reaction force and deformation characteristics of the structure are analyzed based on the three span continuous curved box girder bridge engineering example. The mechanical characteristics of continuous curved box girder bridge are summarized. 2. Combined with engineering examples, several space girder models are established, other influence parameters are not changed, different center angle 0 擄-50 擄is taken, and 10 擄is taken as a difference. This paper analyzes and discusses the influence of the control section on bending moment, torque, shear force and reaction force due to the factors of center angle under different loads. 3. In combination with the supporting layout of the background engineering, the control superstructure remains unchanged. The influence of different supporting forms on the internal force of curved beam bridge and the influence of radial offset of middle pier support on supporting reaction force are studied. 4. According to the analysis theory of curved beam bridge, the analysis results of background engineering model are tested and verified. According to the structural response characteristics of curved beam bridge, some suggestions are provided for the load test of this kind of curved beam bridge.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U441

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本文編號：2326091