本文選題：連續(xù)剛構(gòu)橋 + 非對(duì)稱施工��； 參考：《長(zhǎng)安大學(xué)》2015年碩士論文

【摘要】：連續(xù)剛構(gòu)橋在國(guó)內(nèi)得到了廣泛的應(yīng)用。對(duì)于修建在山區(qū)峽谷地區(qū)的連續(xù)剛構(gòu)橋,由于受到地貌限制,主梁邊中跨比不得不做的異于普通橋梁,橋跨常常設(shè)置成不對(duì)稱的形式�？鐝讲粚�(duì)稱會(huì)造成橋墩上T構(gòu)兩邊梁段數(shù)量不一致,這樣的連續(xù)剛構(gòu)橋常常采用非對(duì)稱施工,合龍順序也會(huì)有所不同。云南省普宣高速公路小灣大橋是一座典型的采用非對(duì)稱施工的連續(xù)剛構(gòu)橋,邊跨比中跨多出兩個(gè)梁段,本文立足于非對(duì)稱施工的連續(xù)剛構(gòu)橋小灣大橋,采用橋梁結(jié)構(gòu)專用分析軟件MIDAS/Civil對(duì)施工過程進(jìn)行模擬,對(duì)比分析了兩種非對(duì)稱施工方法,進(jìn)行了合龍優(yōu)化研究,并擬合出頂推力的實(shí)用計(jì)算公式。本文的主要研究?jī)?nèi)容有:⑴針對(duì)邊跨多出梁段的非對(duì)稱施工,對(duì)比分析了兩種非對(duì)稱施工方法,方法一為在中跨配重、非對(duì)稱澆筑邊跨多出梁段,方法二為先中跨合龍后再非對(duì)稱澆筑邊跨多出梁段。從主梁應(yīng)力、主梁線形、橋墩內(nèi)力和墩頂位移四個(gè)方面對(duì)兩種方法進(jìn)行了對(duì)比分析。⑵針對(duì)先邊跨后中跨和先中跨后邊跨兩種不同合龍順序,從主梁應(yīng)力、主梁線形、橋墩內(nèi)力和墩頂位移四個(gè)方面進(jìn)行了對(duì)比分析。⑶針對(duì)溫度變化對(duì)主梁應(yīng)力和主梁線形的影響,以系統(tǒng)升溫為例,分析了兩種不同合龍順序下系統(tǒng)溫差效應(yīng)的差異。⑷針對(duì)混凝土收縮、徐變對(duì)橋梁施工過程和成橋狀態(tài)的影響,分析了收縮、徐變對(duì)主梁應(yīng)力和主梁線形的影響,并比較了兩種不同合龍順序的收縮、徐變效應(yīng)。⑸針對(duì)連續(xù)剛構(gòu)橋在合龍時(shí)要進(jìn)行頂推,闡述了計(jì)算頂推力的有限元方法。由MATLAB線性擬合出由合龍溫差計(jì)算頂推力的實(shí)用計(jì)算公式。國(guó)內(nèi)外有不少采用非對(duì)稱施工的連續(xù)剛構(gòu)橋,但是相關(guān)的文獻(xiàn)卻很少。通過本文對(duì)非對(duì)稱施工連續(xù)剛構(gòu)橋的詳細(xì)對(duì)比分析,得到的結(jié)果可以為同類橋梁的設(shè)計(jì)和施工提供很好的參考。
[Abstract]:Continuous rigid frame bridge has been widely used in China. For the continuous rigid frame bridge built in the mountain canyons, due to the geomorphological constraints, the ratio of middle to middle span of the main beam is different from that of the ordinary bridge, and the bridge span is often set in an asymmetric form. The dissymmetry of span will result in the different number of beams on both sides of T structure on the pier. Such continuous rigid frame bridge is often constructed by asymmetric construction, and the closure sequence will be different. Xiaowan Bridge of Puxuan Expressway in Yunnan Province is a typical continuous rigid frame bridge with asymmetric construction. The construction process is simulated with Midas / Civil, a special analysis software for bridge structure, two asymmetric construction methods are compared and analyzed, the optimization of closure is studied, and the practical calculation formula of thrust is fitted out. The main research contents of this paper are as follows: 1. Two asymmetric construction methods are compared and analyzed in view of asymmetric construction of multi-beam section with side span. The second method is that the middle span is closed and then the asymmetric casting edge span is more than the beam section. From four aspects of the stress of the main beam, the shape of the main beam, the internal force of the pier and the displacement of the pier top, the two methods are compared and analyzed .2 aiming at the two different closure sequences of the first span and the second span and the first middle span and the second side span, from the main beam stress, the main beam line shape, In view of the influence of temperature change on the stress and alignment of the main beam, the internal force of the pier and the displacement of the pier top are compared and analyzed in this paper. The temperature rise of the system is taken as an example. This paper analyzes the difference of system temperature difference effect under two different closure sequences. 4. Aiming at the influence of concrete shrinkage and creep on the bridge construction process and bridge state, the effects of shrinkage and creep on the stress of the main beam and the shape of the main beam are analyzed. This paper also compares the shrinkage of two different closure sequences. The creep effect of 5. 5 is a finite element method to calculate the thrust of the continuous rigid frame bridge. A practical formula for calculating the top thrust from the temperature difference of the closure is fitted linearly by MATLAB. There are many continuous rigid frame bridges with asymmetric construction at home and abroad, but there are few related documents. Through the detailed comparison and analysis of asymmetric continuous rigid frame bridges, the results obtained can provide a good reference for the design and construction of similar bridges.
【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)】：U445.4;U448.23

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 劉志軍;;長(zhǎng)聯(lián)高墩大跨不對(duì)稱連續(xù)剛構(gòu)橋設(shè)計(jì)與施工研究[J];鐵道工程學(xué)報(bào);2010年12期

2 馬明;;連續(xù)剛構(gòu)橋合龍頂推力的探討[J];交通科技;2013年S1期

3 陳秀清;裴萬勝;程菊紅;王賢斌;;預(yù)應(yīng)力混凝土連續(xù)梁橋合龍順序?qū)Τ蓸驙顟B(tài)的影響研究[J];鐵道建筑;2013年12期

4 陳嵐峰;楊靜瑜;崔崧;潘慶超;李柳;;基于MATLAB的最小二乘曲線擬合仿真研究[J];沈陽師范大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年01期

5 周偉;胡鐵山;賴敏芝;;四跨連續(xù)剛構(gòu)橋合龍頂推力計(jì)算與效應(yīng)分析[J];交通科技;2014年03期

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本文編號(hào)：2008481