本文選題：設(shè)計荷載 + 線形��； 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：對一座橋梁施工質(zhì)量的衡量,其主要標(biāo)準(zhǔn)就是看橋梁的實際受力狀態(tài)及線形是否達(dá)到設(shè)計的要求。在大跨徑拱橋中,拱橋內(nèi)力的分布在很大程度上取決于拱圈線形,而對其進行線形控制就是為了使內(nèi)力及成橋線形達(dá)到設(shè)計要求。對于大跨度鋼筋混凝土拱橋,線形控制就是使拱箱的實際成拱線形在設(shè)計要求范圍內(nèi),并使其達(dá)到目標(biāo)成拱線形。本文以位于云南省迪慶州瀾滄江上的托巴大橋為工程背景,對以上問題進行研究,該橋?qū)儆谥剌d拱橋。由于工程實際的需要,汽車-60級,掛車-300驗算(當(dāng)使用汽-60,掛-300的荷載設(shè)計時,橋梁上至少可以通過300噸的汽車荷載)。(1)拱橋載重越大,其設(shè)計要求越高,對其線形和應(yīng)力則更需是在設(shè)計要求之內(nèi)。應(yīng)用有限元軟件對該橋施工預(yù)拱度進行合理設(shè)置,分析重載拱橋的預(yù)拱度設(shè)置。為今后重載拱橋的預(yù)拱度設(shè)置提供一定的參考依據(jù)。(2)重載拱橋的設(shè)計載重越是增大,其對線形的影響越是嚴(yán)重。因各種誤差因素的影響,實測線形是很難做到與設(shè)計線形完全一致。結(jié)合有限元分析軟件對施工各階段的沉降進行分析,并分析拱上建筑隊拱圈線形的影響。(3)論文結(jié)合托巴拱橋,對拱上建筑應(yīng)力對線形的影響進行分析研究,同時總結(jié)各施工階段應(yīng)力和線形之間的影響和變化規(guī)律。分析重載拱橋施工中應(yīng)力和線形之間關(guān)系,并通過此規(guī)律,在以后的重載鋼筋混凝土拱橋施工中,可以通過位移變化情況,大概計算出全橋的應(yīng)力分布情況,能在一定程度上解決應(yīng)力監(jiān)測困難的問題。對重載拱橋拱圈最不利受力和位移變化最大位置進行重點監(jiān)控,對今后重載拱橋在拱圈線形和應(yīng)力控制方面有一定的參考意義。(4)對托巴大橋進行荷載試驗,檢測其承載力是否達(dá)到設(shè)計荷載標(biāo)準(zhǔn)。通過試驗研究分析重載拱橋的線形、內(nèi)力受外力影響與普通橋梁的不同,對其穩(wěn)定性進行分析判斷,為以后同類橋梁的施工及監(jiān)控提供參照研究打下一定基礎(chǔ)。
[Abstract]:To measure the construction quality of a bridge, its main criterion is to see whether the actual force state and the line shape of the bridge meet the design requirements. In the long span arch bridge, the distribution of the internal force of the arch bridge to a great extent depends on the arch ring shape, and the linear control of the arch bridge is to make the internal force and the bridge alignment meet the design requirements. For long span reinforced concrete arch bridge, linear control is to make the actual arch shape of the arch box within the design requirements, and to achieve the goal of the arch line. In this paper, the Toba Bridge, located on the Lancang River in Diqing Prefecture, Yunnan Province, is taken as the engineering background, and the above problems are studied. The bridge belongs to the heavy-haul arch bridge. Because of the actual engineering needs, the larger the load of the arch bridge, the higher the design requirement of the arch bridge, the greater the load on the arch bridge is, the greater the load of the automobile class -60, the trailer -300 (when the load of the automobile is 60, hanging, 300) is used, the bridge can pass through at least 300 tons of vehicle load. For its shape and stress, it is more necessary to be within the design requirements. This paper applies finite element software to set the pre-arch degree of the bridge, and analyzes the pre-arch degree setting of the heavy-load arch bridge. The design load of the heavy-haul arch bridge increases, and the influence on the alignment becomes more serious, which provides a certain reference basis for setting the pre-arch degree of the heavy-haul arch bridge in the future. Due to the influence of various error factors, it is difficult for the measured alignment to be completely consistent with the design line. Combined with finite element analysis software, the settlement of each stage of construction is analyzed, and the influence of arch ring shape on arch construction team is analyzed in this paper. In combination with Toba arch bridge, the influence of building stress on line shape on arch is analyzed and studied in this paper. At the same time, the influence and variation law of stress and line shape in each construction stage are summarized. This paper analyzes the relationship between stress and line shape in the construction of heavy-duty arch bridge, and through this rule, the stress distribution of the whole bridge can be calculated by the change of displacement in the later construction of heavy-duty reinforced concrete arch bridge. It can solve the problem of stress monitoring to some extent. This paper focuses on monitoring the most unfavorable force and the maximum position of displacement change of arch ring of heavy-haul arch bridge, which has certain reference significance for the arch ring shape and stress control of heavy-haul arch bridge in the future. Check whether the bearing capacity is up to the design load standard. Through experimental study and analysis of the alignment of heavy-duty arch bridge, the internal force affected by external force is different from that of common bridge. The stability of the bridge is analyzed and judged, which will provide a reference for the construction and monitoring of similar bridges in the future.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U445.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 包儀軍;王常峰;趙繼康;;基于改進灰色預(yù)測GM(1,1)模型的大跨度橋梁施工控制[J];鐵道建筑;2016年02期

2 葛海燕;;橋梁施工監(jiān)控的必要性和目的[J];黑龍江水利科技;2012年12期

3 顧飛;;基于自適應(yīng)系統(tǒng)的預(yù)應(yīng)力混凝土橋梁施工控制研究[J];21世紀(jì)建筑材料;2010年06期

4 趙洋;周水興;劉靜;;鋼管混凝土拱橋拱肋吊裝線形控制的分步算法[J];重慶交通大學(xué)學(xué)報(自然科學(xué)版);2010年01期

5 李建紅;盛靖;楊東;;纜索吊裝法鋼筋混凝土拱橋的施工誤差分析[J];四川建筑;2009年06期

6 唐弘玻;;淺析橋梁施工監(jiān)控的重要性[J];知識經(jīng)濟;2009年13期

7 陳寶春;葉琳;;我國混凝土拱橋現(xiàn)狀調(diào)查與發(fā)展方向分析[J];中外公路;2008年02期

8 董道海;;鐵路客運專線仰拱長棧橋施工技術(shù)[J];鐵道工程學(xué)報;2007年S1期

9 齊林;黃方林;賈承林;;連續(xù)剛構(gòu)橋施工線形和應(yīng)力的分析與控制[J];鐵道科學(xué)與工程學(xué)報;2007年02期

10 張建民,肖汝誠;千米級斜拉橋施工過程中的索力優(yōu)化與線形控制研究[J];土木工程學(xué)報;2005年07期

相關(guān)碩士學(xué)位論文 前10條

1 趙衛(wèi)冬;拱橋雙向移動纜索吊裝系統(tǒng)研究與應(yīng)用[D];昆明理工大學(xué);2016年

2 王帆;分階段施工橋梁線形控制[D];西南交通大學(xué);2015年

3 翟磊;鋼筋混凝土橋梁荷載試驗中的應(yīng)變測試方法研究[D];重慶交通大學(xué);2013年

4 范慶華;2×90m多拱肋式鋼筋混凝土拱橋荷載試驗及承載能力評估[D];吉林大學(xué);2013年

5 曹宇;大跨徑上承式拱橋施工控制研究[D];吉林大學(xué);2013年

6 蔣英杰;大跨度預(yù)應(yīng)力混凝土連續(xù)梁橋的施工控制方法[D];西南交通大學(xué);2010年

7 付宇斌;最小二乘法在混合梁斜拉橋施工控制中的應(yīng)用[D];西南交通大學(xué);2010年

8 梁曉菊;拱橋有限元設(shè)計計算原理及程序開發(fā)[D];重慶交通大學(xué);2008年

9 陳江華;菜園壩長江大橋荷載試驗方案研究[D];重慶交通大學(xué);2007年

10 段瑞芳;鋼管混凝土拱橋拱肋纜索吊裝施工預(yù)拱度設(shè)置研究[D];長安大學(xué);2006年

，

本文編號：2048986