本文關(guān)鍵詞： 彎梁橋 偏位機(jī)理 加固方案 跟蹤觀　出處：《長(zhǎng)安大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：彎梁橋是橋梁結(jié)構(gòu)的重要形式之一,它能很好地適應(yīng)橋址受地形地物限制的需要,而且現(xiàn)代人不斷提高審美水平,線條平順流暢才能滿足要求。隨著城市公路和高速公路的快速發(fā)展,高架橋和互通式立交被大量修建。由于結(jié)構(gòu)受力上的特點(diǎn),曲線梁橋、尤其是小半徑彎梁橋比直線梁橋更容易出現(xiàn)各種病害,上部結(jié)構(gòu)主梁移位并發(fā)生局部扭轉(zhuǎn)、梁體開(kāi)裂、支座及伸縮縫損壞失效。近些年來(lái),全國(guó)各地的彎梁橋普遍存在各種病害,以偏位出現(xiàn)最多。所以彎梁橋的養(yǎng)護(hù)加固研究迫在眉睫。本文分析了彎梁橋偏位的機(jī)理是多方面累積的效應(yīng),并陳述了幾種常用的彎梁橋偏位加固方案,分別討論了各加固方案的適用條件。綜合LD高速十六標(biāo)的依托工程,分析依托工程實(shí)橋的偏位原因,并針對(duì)第二聯(lián)的高程和線形變化分別分析了變位原因。根據(jù)實(shí)際情況做對(duì)比分析后確定了加固方案,并對(duì)加固方案具體細(xì)節(jié)進(jìn)行陳述。使用有限元軟件Midas/Civil對(duì)依托工程大橋進(jìn)行仿真模擬,采用頂升時(shí)的支反力控制頂升量,以8號(hào)墩為例分別計(jì)算頂升3.0cm、4.0cm、4.5cm、5.0cm時(shí)箱梁底板的應(yīng)力。結(jié)合后期觀測(cè)數(shù)據(jù),經(jīng)加固一年后梁體位置穩(wěn)定,基本沒(méi)有位移。
[Abstract]:Curved beam bridge is one of the important forms of bridge structure, it can meet the needs of the bridge site limited by terrain and objects, and modern people constantly improve the aesthetic level. With the rapid development of urban highways and highways, viaduct and interchange have been built. Because of the structural characteristics, curved girder bridge. Especially, small radius curved beam bridge is more prone to various diseases than linear beam bridge, superstructure main beam displacement and local torsion, beam body cracking, failure of support and expansion joint. In recent years. There are many kinds of diseases in curved beam bridges all over the country, and most of them appear in skew position. Therefore, it is urgent to study the maintenance and reinforcement of curved beam bridges. This paper analyzes the mechanism of deflection of curved beam bridges is a cumulative effect of many aspects. Several commonly used deflection reinforcement schemes of curved girder bridge are stated, and the applicable conditions of each reinforcement scheme are discussed respectively. The reason of the deflection of the bridge is analyzed by synthesizing the 16 standard backing project of LD high speed. According to the second combination of elevation and linear changes respectively analyzed the reasons for the displacement. According to the actual situation of comparative analysis to determine the reinforcement scheme. The finite element software Midas/Civil is used to simulate the supporting engineering bridge, and the support reaction force is used to control the uplift. Taking Pier 8 as an example, the stress of the bottom plate of the box girder is calculated when the uplift is 3.0cm ~ 4.0cm ~ (-1) ~ 4.5cm ~ (-1). Combined with the observation data, the position of the beam body is stable after one year's reinforcement. There is basically no displacement.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.72

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本文編號(hào)：1493185