【摘要】：隨著設(shè)計理論、建筑材料與施工技術(shù)的進(jìn)步,混凝土拱橋、鋼管混凝土拱橋和鋼拱橋都得到了快速發(fā)展。近年來,日本、克羅地亞以及歐洲一些知名國際公司相繼開展了600m～1000m級特大跨徑鋼筋混凝土拱橋試設(shè)計研究。由于拱上建筑構(gòu)造與布置直接影響到主拱圈內(nèi)力和線形,因此本文以600m跨鋼筋混凝土拱橋為工程背景,開展特大跨徑鋼筋混凝土拱橋拱上建筑構(gòu)造與布置形式研究： ①收集整理國內(nèi)外大跨徑、特大跨徑鋼筋混凝土拱橋拱上建筑構(gòu)造形式的資料,分析腹孔跨徑布置的影響因素； ②設(shè)計了拱上建筑為連續(xù)梁-連續(xù)剛構(gòu)、交界墩T形剛構(gòu)、拱頂段整體現(xiàn)澆、橋道梁為鋼-混組合結(jié)構(gòu)和拱上建筑全為鋼-混組合結(jié)構(gòu)五種形式,分別擬定了各自的截面形式和跨徑布置； ③圍繞上述五種拱上建筑布置方案,采用有限元軟件ANSYS開展主拱圈合理拱軸系數(shù)分析,在此基礎(chǔ)上計算分析不同形式的拱上建筑對內(nèi)力、位移以及穩(wěn)定性等影響規(guī)律； ④針對每一種拱上建筑形式,提出特大跨徑鋼筋混凝土拱橋拱上建筑合適的結(jié)構(gòu)類型和腹孔跨徑布置方案； ⑤分析比較五種不同拱上建筑形式在自重作用下和靜風(fēng)作用下的穩(wěn)定性能,判定特大跨徑鋼筋混凝土拱橋的失穩(wěn)模態(tài)； ⑥隨著拱上建筑的不斷加載,主拱圈截面發(fā)生轉(zhuǎn)角位移,由于特大跨徑拱橋靠近拱腳截面的立柱高度大而導(dǎo)致立柱也會發(fā)生較大偏位,因此,為了保證立柱成橋后的垂直度,在施工過程須預(yù)偏立柱。
[Abstract]:With the development of design theory, building materials and construction technology, concrete arch bridges, concrete filled steel tubular arch bridges and steel arch bridges have been developed rapidly. In recent years, some famous international companies in Japan, Croatia and Europe have carried out the trial design research of 600-1000m super-long span reinforced concrete arch bridges. The internal force and alignment of the main arch ring are directly affected by the arrangement of the arch ring. In this paper, 600 m-span reinforced concrete arch bridge is taken as the engineering background to carry out the research on the arch structure and layout of the super-long-span reinforced concrete arch bridge.
(1) Collect and collate the data of the arch structure of large-span and extra-long-span reinforced concrete arch bridges at home and abroad, and analyze the influencing factors of the abdominal span layout;
(2) Five kinds of structures, including continuous beam-continuous rigid frame, T-shaped rigid frame of junction pier, integral cast-in-place of arch top, steel-concrete composite structure of bridge girder and steel-concrete composite structure of arch structure, are designed, and their cross-section forms and span arrangements are worked out respectively.
(3) Around the above-mentioned five kinds of arch building layout schemes, the finite element software ANSYS is used to analyze the rational arch axis coefficient of the main arch ring, and on this basis, the influences of different types of arch buildings on internal force, displacement and stability are calculated and analyzed.
(4) For each type of arch structure, the appropriate structure type and the layout scheme of the abdominal span are proposed for the arch structure of the extra-long-span reinforced concrete arch bridge.
_By analyzing and comparing the stability performance of five different arch structures under the action of gravity and static wind, the instability modes of super-long-span reinforced concrete arch bridges are determined.
_With the continuous loading of arch buildings, the main arch ring section occurs angular displacement, because the height of the column near the arch foot section of the super-long-span arch bridge will lead to larger column deviation, therefore, in order to ensure the verticality of the column after completion of the bridge, it is necessary to pre-deflect the column in the construction process.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U448.22

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