【正文】 ............................................. 35 混凝土收縮效應(yīng) .......................................................................................... 35 與剪力相應(yīng)的軸向力 ................................................................................... 35 拱圈效應(yīng)標(biāo)準(zhǔn)值匯總 ............................................................................................ 35 拱圈截面強(qiáng)度驗(yàn)算 ................................................................................................ 37 拱圈整體“強(qiáng)度 — 穩(wěn)定”驗(yàn)算 ............................................................................ 42 拱腳截面直 接抗剪驗(yàn)算 ........................................................................................ 45 溫度上升 ....................................................................................................... 45 溫度下降 ....................................................................................................... 46 不計溫度作用 ............................................................................................... 46 拱圈配筋計算 ........................................................................................................ 46 第四章 拱上立柱的計算 ........................................................................................................ 46 立柱抗推剛度計算 .................................................................................................. 46 P1 立柱承載能力計算 ............................................................................................. 47 P1 立柱偏心距計算 ................................................................................................. 48 立柱配筋計算 .......................................................................................................... 49 第五章 空心板的計算 ............................................................................................................ 49 計算空心板的荷載橫向分布系數(shù)和沖擊系數(shù) ...................................................... 49 計算荷載橫向分布系數(shù) ................................................................................ 49 計算汽車沖擊系數(shù) ........................................................................................ 53 空心板內(nèi)力計算 ...................................................................................................... 54 恒載引起的一塊板的最大彎矩 .................................................................... 54 活載引起的彎矩計算 .................................................................................... 54 荷載組合 ........................................................................................................ 55 截面配筋及驗(yàn)算 ...................................................................................................... 55 截面等效換算 ................................................................................................. 55 配筋計算、判斷截面類型 ............................................................................. 56 截面復(fù)核 ......................................................................................................... 58 結(jié)論 .......................................................................................................................................... 59 參考文獻(xiàn) .................................................................................................................................. 61 致謝 .......................................................................................................................................... 62 本科畢業(yè)論文（設(shè)計） I 摘要 源石大橋位于貴州省金沙縣源鄉(xiāng)村，橋址地處山區(qū)丘陵地貌，地形起伏，喀斯特地貌明顯，地質(zhì)條件良好。 根據(jù)最基本設(shè)計資料，初步擬定了拱橋、等截面連續(xù)梁橋兩個方案。經(jīng)過綜合詳盡的比較，最終以拱橋?yàn)樵O(shè)計方案。該拱橋?yàn)樯铣惺娇崭故焦皹?，全橋由一跨跨越山谷的拱橋及兩端引橋組成，拱橋的凈跨徑為 72m，矢跨比為 1/6。本橋主拱圈橫截面采用了單箱三室型截面，全空腹式布局，腹孔柱式墩采用普通鋼筋混凝土澆筑，腹孔上部結(jié)構(gòu)均采用標(biāo)準(zhǔn)跨徑 。引橋上部采用標(biāo)準(zhǔn)跨徑 12m的預(yù)制空心板。 確定橋梁形式后，計算拱軸系數(shù)為拱橋手算的重點(diǎn)部分，拱軸系數(shù)計算得準(zhǔn)確性將直接影響后續(xù)計算，所以在進(jìn)行拱軸系數(shù)計算過程中務(wù)必細(xì)心。本橋主拱采用懸鏈線作為拱軸線，拱軸系數(shù)經(jīng)多次手算獲得最佳值。 第二步就要進(jìn)行結(jié)構(gòu)計算，計算取得最佳拱軸線系數(shù)后，再計算主拱圈內(nèi)力以及溫度混凝土收縮徐變的影響。 完成以上工作之后，接下來進(jìn)行結(jié)構(gòu)驗(yàn)算，拱橋設(shè)計需要驗(yàn)算的方面有：①拱圈截面的承載能力；②拱圈拱腳抗剪能力。 關(guān)鍵詞 ： 鋼筋混凝土拱橋；上承式；拱軸系數(shù)；結(jié)構(gòu)計算；拱橋驗(yàn)算 II Abstract Source direction is located in guizhou province was jinsha source country, the bridge is located in the mountainous hilly topography, relief, karst landform, geological condition is good. According to the basic design data, initially drawn up arch bridge, such as section of continuous girder bridge two solutions. After prehensive detailed parison, finally to arch bridge design. The CFST arch bridge bearing type hollow type, the whole bridge by a cross of arch bridge across the valley and both ends of bridge approach, the span of arch bridge is 72 m, risespan ratio is 1/6. This bridge main arch ring cross section adopts single box type 3 rooms section, all type layout on an empty stomach, abdomen bore log pier using ordinary reinforced concrete pouring, ventral holes of the upper structure adopts the standard m span precast hollow slab. Approach of upper with standard 12 m prefabricated hollowcore slab. Bridge after the form is determined, calculation of arch axis coefficient for the key parts of arch bridge by hand, arch axis coefficient calculation accuracy will directly affect the subsequent calculations, so must be careful in the process of the arch axis coefficient calculation. The main arch bridge using catenary as arch axis, coefficient of arch axis by hand is to get the best value for many times. the second step is to structure to calculate the optimal arch axis coefficient, then calculate the internal forces of the main arch ring and temperature effect of concrete shrinkage and creep. After finish the above work, the structure calculation, arch bridge design need to check the aspects are: (1) the bearing capacity of arch ring cross section。 (2) the shear capacity of arch ring of arch feet. Key words: reinforced concrete arch bridge。 Deck type。 The arch axis coefficient。 Structural calculation。 Arch bridge calculation 貴州大學(xué)本科畢業(yè)論文（設(shè)計）