本文關(guān)鍵詞：大跨曲線連續(xù)梁橋與軌道相互作用　出處：《中南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 連續(xù)曲線梁 有砟軌道 梁軌相互作用 制動力 伸縮力 撓曲力

【摘要】：摘要：高速鐵路大跨度曲線連續(xù)梁橋可較好的適應(yīng)地形、水利、交通等條 件,在高速鐵路中應(yīng)用日益廣泛,梁軌間相互作用成為大跨度曲線橋梁與 無縫線路設(shè)計(jì)及安全使用的重要控制因素之一。本文針對高速鐵路線上 的大跨度曲線連續(xù)梁橋,對有砟軌道與橋梁相互作用進(jìn)行了系統(tǒng)的研究, 主要內(nèi)容如下：(1)以高速鐵路48m+7×80m+48m長聯(lián)大跨度雙線有砟軌道曲線連 續(xù)梁橋?yàn)楣こ瘫尘?建立了鋼軌-扣件-軌枕-道砟-梁體-墩臺的一體化空間 有限元模型,模擬了線路的縱、橫向阻力及豎向剛度,更準(zhǔn)確地反映軌道、 軌枕、橋面、橋墩等各組成間的關(guān)系。(2)研究了橋上有砟軌道在列車制動、溫度和豎向活載作用下的受 力和變形規(guī)律,探討了高速鐵路曲線連續(xù)梁橋伸縮附加力、撓曲附加力及 制動附加力的大小及分布規(guī)律。(3)針對大跨曲線連續(xù)梁橋的計(jì)算,結(jié)果表明設(shè)置小阻力扣件和鋼 軌伸縮調(diào)節(jié)器組合布置方案是必須的,且可以很大程度上減小鋼軌中的受 力。此外探討了墩柱與梁間縱向剛度、制動墩位置以及墩柱與梁間約束條 件的改進(jìn)方法,提出了制動跨度的概念,結(jié)果表明改變墩柱與梁間的約束 可以達(dá)到降低鋼軌應(yīng)力的目的。
[Abstract]:Abstract: High-speed railway long-span curved continuous beam bridge can adapt to terrain, water conservancy, traffic and so on. In high speed railway, the interaction between beam and rail becomes a kind of curve bridge with long span One of the important control factors for the design and safe use of the seamless track. The interaction between the ballasted track and the bridge is studied systematically. The main contents are as follows: 1) the curve of double-track ballasted track with a span of 48m 7 脳 80m 48m is connected to the high-speed railway. In the engineering background of continuous beam bridge, the integrated space of rail, fastener, sleeper, ballast, beam body and pier platform is established. The finite element model is used to simulate the longitudinal, transverse resistance and vertical stiffness of the track to reflect the track more accurately. The relationship among the components of sleepers, deck, piers, etc. (2) the study of the bearing of ballasted track on the bridge under the action of train braking, temperature and vertical live load The law of force and deformation is discussed in this paper. The extension and additional force of curved continuous beam bridge on high speed railway, flexural additional force and flexural additional force are discussed. The size and distribution of braking additional force (3) for the calculation of long-span curved continuous beam bridge, the result shows that the small resistance fastener and steel are set up. The combined arrangement of rail expansion regulator is necessary, and it can greatly reduce the load of rail. In addition, the longitudinal stiffness between the pier and the beam, the position of the brake pier and the restraint strip between the pier and the beam are discussed. The concept of braking span is put forward, and the result shows that the constraint between pier column and beam is changed. The purpose of reducing rail stress can be achieved.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U441;U211

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