【正文】 摘 要 隨著我國(guó)經(jīng)濟(jì)建設(shè)的發(fā)展，橋梁現(xiàn)代化建設(shè)也在加快進(jìn)程。橋梁是交通的咽喉，作為跨越江河、山谷與公路、鐵路重要結(jié)構(gòu)物的橋梁其施工技術(shù)、施工工藝和施工組織方案等方面正在得到新的發(fā)展和提高。 混凝土梁式橋在我國(guó)橋梁建筑上占我重要的地位，在目前，對(duì)于中小跨徑的永久性橋梁，無(wú)論是公路橋梁或者城市橋梁，都在盡量采用混凝土梁式橋，因?yàn)檫@種橋梁具有就地取材，工業(yè)化施工，耐久性好，適應(yīng)性強(qiáng)。整體性好以及美觀等多種優(yōu)點(diǎn)。 本設(shè)計(jì)采用裝配式簡(jiǎn)支 T梁結(jié)構(gòu)，其上部結(jié)構(gòu)由主梁、橫隔梁、行車(chē)道板，橋面部分和支座等組成，顯然主 梁是橋梁的主要承重構(gòu)件。其主梁通過(guò)橫梁和行車(chē)道板連接成為整體，使車(chē)輛荷載在各主梁之間有良好的橫向分布。橋面部分包括橋面鋪裝、伸縮裝置和欄桿等組成，這些構(gòu)造雖然不是橋梁的主要承重構(gòu)件，但它們的設(shè)計(jì)與施工直接關(guān)系到橋梁整體的功能與安全。 本設(shè)計(jì)具體包括以下幾個(gè)部分：橋型布置，結(jié)構(gòu)各部分尺寸擬定；選取計(jì)算結(jié)構(gòu)簡(jiǎn)圖；恒載內(nèi)力計(jì)算；活載內(nèi)力計(jì)算；荷載組合；配筋計(jì)算；截面強(qiáng)度驗(yàn)算；橫隔梁的計(jì)算；行車(chē)道板的計(jì)算。 關(guān)鍵詞： 簡(jiǎn)支 T梁， 上部結(jié)構(gòu) ， 配筋 驗(yàn)算 Abstract With the development of China39。s economic construction, Bridges modernization is to speed up the is the throat of the traffic, as across rivers, valleys and highway, railway bridge of important structures its construction technology, construction technology and construction anization plan and so on is the new development and improve. Concrete beam bridge of my important position in the bridge construction in China, at present, for small and medium span of permanent bridge, highway Bridges and city Bridges, are used as far as possible concrete beam bridge, because this kind of Bridges with local materials, industrial construction, good durability, strong adaptability,.Integral sex is good and beautiful, and other advantages. This design adopts the fabricated simply supported T beam structure, the upper structure consists of main girder, transverse beam, driving, but the deck part and bearing etc, apparently girder bridge is the main bearing main girder by beams and driving but connected into one whole, make the vehicle load between the beams have good lateral deck consists of bridge deck pavement, telescopic device and railings, etc, the main bearing ponent not bridge structure, but their design and construction of the bridge is directly related to the overall function and safety. This design including the following several parts: bridge layout, structure size for each part。Select calculation structure diagram。Dead load internal force calculation。Live load internal force calculation。Load bination。Reinforcement calculation。Cross section strength calculation。The calculation of transverse beam insulation。The calculation of driving but I. Key words: simply supported T beam, the upper structure, reinforcement calculation 目 錄 前 言 ............................................................................................................................ 1 第 1 章 方案比選與擬訂 .............................................................................................. 2 考慮因素 ............................................................................................................. 2 設(shè)計(jì)方案 ............................................................................................................. 3 方案比選 ............................................................................................................. 4 第 2 章 設(shè)計(jì)基本資料 .................................................................................................. 5 第 3 章 橫截面布置 ...................................................................................................... 7 橋跨結(jié)構(gòu)橫縱斷面圖、 T 形梁一般構(gòu)造圖 ............................................................. 7 主梁截面尺寸 ...................................................................................................... 7 計(jì)算截面幾何特征 ............................................................................................... 8 橫隔梁設(shè)置 .......................................................................................................... 8 第 4 章 主梁計(jì)算 .......................................................................................................... 9 主梁的荷載橫向分布系數(shù) ..................................................................................... 9 跨中荷載彎矩橫向分布系數(shù) — 修正偏心壓力法 ............................................ 9 梁端荷載橫向荷載分布系數(shù)計(jì)算 — 杠桿原理法 .......................................... 12 作用效應(yīng)計(jì)算 .................................................................................................... 13 永久作用效應(yīng) ........................................................................................... 13 可變作用效應(yīng) ........................................................................................... 14 持久張拉承載能力極限狀態(tài)下截面設(shè)計(jì)、配筋與驗(yàn)算 ......................................... 22 配置主筋 .................................................................................................. 22 持久狀況截面承載能力極限狀態(tài)計(jì)算 ........................................................ 23 根據(jù)斜截面抗剪承載力進(jìn)行斜筋配置 ........................................................ 24 箍筋配置 .................................................................................................. 27 斜截面抗剪承載能力驗(yàn)算 ......................................................................... 28 ...................................... 32 持久狀況正常使用極限狀態(tài)下裂縫寬度驗(yàn)算 ....................................................... 32 持久狀況正常使用極限狀態(tài)下?lián)隙闰?yàn)算 .............................................................. 33 第 5 章 橫隔梁的計(jì)算 ................................................................................................ 37 橫隔梁內(nèi)力計(jì)算 — 偏心壓力法 ............................................................................ 37 橫隔梁的內(nèi)力影響線 ................................................................................ 37 作用在橫隔梁上的計(jì)算荷載 ...................................................................... 38 截面內(nèi)力計(jì)算 ........................................................................................... 39 橫隔梁截面配筋與驗(yàn)算 ...................................................................................... 40 正彎矩配筋 .............................................................................................. 40 負(fù)彎矩配筋 ..................................