本文選題：鋼管混凝土拱橋 + 灌注順序��； 參考：《鄭州大學(xué)》2015年碩士論文

【摘要】：鋼管混凝土拱橋具有承載能力大、自重輕、橋型美觀、施工便捷,適宜建造大跨度橋梁等優(yōu)點(diǎn),近年來(lái)在我國(guó)的橋梁工程中得到了廣泛運(yùn)用。鋼管混凝土拱橋施工過(guò)程復(fù)雜且影響因素多,為了保證橋梁順利建成并符合設(shè)計(jì)要求,需要對(duì)其進(jìn)行施工監(jiān)控。本文以寧西鐵路西安?南陽(yáng)段增建第二線趙河特大橋主橋——跨徑64m鋼管混凝土系桿拱橋?yàn)橐劳泄こ?建立橋梁有限元計(jì)算模型開展現(xiàn)場(chǎng)施工監(jiān)控,同時(shí)為保證橋梁施工監(jiān)控取得較好的效果,就拱肋混凝土的灌注順序、結(jié)構(gòu)參數(shù)的敏感性及其識(shí)別進(jìn)行了分析研究。主要內(nèi)容有:(1)利用有限元軟件Midas/civil建立計(jì)算模型,采用施工階段聯(lián)合截面模擬鋼管混凝土拱肋,就拱肋灌注這一關(guān)鍵施工過(guò)程進(jìn)行模擬計(jì)算,對(duì)比分析不同灌注順序?qū)袄叩膽?yīng)力及變形的影響,確定趙河橋拱肋的合理灌注順序。(2)以趙河橋系梁的變形為控制目標(biāo),對(duì)結(jié)構(gòu)參數(shù)進(jìn)行敏感性分析,比較各結(jié)構(gòu)參數(shù)對(duì)控制目標(biāo)的影響程度,確定主要結(jié)構(gòu)參數(shù)。(3)結(jié)合趙河橋的結(jié)構(gòu)特點(diǎn)和施工工藝,制定適合本橋的施工監(jiān)控方案,對(duì)趙河橋施工過(guò)程中系梁的應(yīng)力及變形、拱肋的應(yīng)力及變形、吊桿索力、環(huán)境溫度進(jìn)行現(xiàn)場(chǎng)監(jiān)測(cè)。(4)實(shí)施橋梁施工監(jiān)控,采用最小二乘法對(duì)主要結(jié)構(gòu)參數(shù)進(jìn)行識(shí)別,根據(jù)參數(shù)識(shí)別的結(jié)果對(duì)計(jì)算模型進(jìn)行修正,對(duì)比分析各施工階段下結(jié)構(gòu)狀態(tài)的理論計(jì)算值與現(xiàn)場(chǎng)實(shí)測(cè)值。結(jié)果表明:趙河橋系梁和拱肋各關(guān)鍵截面的應(yīng)力及變形、吊桿索力的實(shí)測(cè)值與理論值的偏差較小,施工監(jiān)控效果良好。
[Abstract]:The concrete filled steel tube arch bridge has the advantages of large bearing capacity, light weight, beautiful bridge type, convenient construction and suitable for the construction of long-span bridges. In recent years, it has been widely used in the bridge engineering in China. The construction process of the concrete filled steel tube arch bridge is complex and has many factors. In order to ensure the smooth completion of the bridge and meet the design requirements, it needs to be introduced into the bridge. In this paper, based on the main bridge of the second line of the Xi'an and Nanyang section of Ningxi railway, the main bridge of the second line of Zhao he bridge, the span 64M steel tube concrete tied arch bridge is supported by the project, the bridge finite element calculation model is set up to carry out the site construction monitoring. At the same time, the better effect of the bridge construction monitoring is achieved. The sequence of the concrete in the arch rib is given. The sensitivity and identification of the structure parameters are analyzed and studied. The main contents are as follows: (1) using the finite element software Midas/civil to establish the calculation model, using the joint section of the construction stage to simulate the steel tube concrete arch rib, the key construction process of the arch rib perfusion is simulated, and the stress and deformation of the arch ribs with different perfusion sequence are compared and analyzed. The rational perfusion sequence of the bridge arch rib of the Zhao river is determined. (2) taking the deformation of the Zhao river bridge system beam as the control target, the sensitivity analysis of the structural parameters is carried out, the influence degree of the structural parameters on the control target is compared and the main structural parameters are determined. (3) the construction monitoring party suitable for the bridge is formulated in combination with the construction characteristics and construction technology of the Zhao River Bridge. The stress and deformation of the beam in the construction process of Zhao he bridge, the stress and deformation of the arch rib, the cable force of the hanger, the environment temperature are monitored in the field. (4) the construction monitoring of the bridge is carried out, the main structural parameters are identified by the least square method, and the calculation model is amended according to the results of the parameter identification, and the structure under each construction phase is compared and analyzed. The theoretical calculation and field measured values show that the stress and deformation of the key sections of the beam and arch ribs of the Zhao River Bridge, the deviation between the measured value of the cable force of the hanger and the theoretical value is small, and the effect of the construction monitoring is good.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 吳文清;王成樹;劉國(guó)昌;葉見曙;;大跨度系桿拱橋柔性吊桿張力監(jiān)測(cè)和參數(shù)識(shí)別研究[J];公路交通科技;2007年01期

2 馬卓群;;鋼管混凝土結(jié)構(gòu)概述[J];科學(xué)之友;2012年03期

3 涂勇;涂清艷;;大跨度鋼管混凝土拱橋施工控制的理論研究[J];中國(guó)水運(yùn)(下半月刊);2011年03期

相關(guān)碩士學(xué)位論文 前4條

1 張玉萍;鋼管混凝土拱橋的抗震性能分析[D];武漢理工大學(xué);2005年

2 肖志輝;大跨度鋼管混凝土拱橋成拱過(guò)程施工控制技術(shù)的研究及應(yīng)用[D];長(zhǎng)沙理工大學(xué);2007年

3 王劍;鋼管混凝土拱橋灌注施工仿真分析[D];西安建筑科技大學(xué);2009年

4 付建宇;鋼管混凝土剛架系桿拱橋施工監(jiān)控的研究和應(yīng)用[D];內(nèi)蒙古科技大學(xué);2012年

，

本文編號(hào)：2034734