【正文】 . 5 7 2 . 5 7 5 7 ) 8 7 . 5 c m22A ? ? ? ? ? ? ? ? ? ?絞 毛截面重心離 1/2 板高處的距離為： 1 / 2 2 5 3 8 . 1 0 . 7 9 c m3 2 0 6 . 3hhSd A? ? ?板 高 （向下移）； 鉸縫重心對(duì) 1/2 板高處的距離為： 2 5 3 8 .1 2 9 cm8 7 .5d ??鉸； 由此得空心板毛截面對(duì)重心軸的慣矩 hI ： 32 229 9 7 0 3 8 1 89 9 7 0 0 . 7 9 2 3 8 1 8 0 . 7 9 4 1 4 3 0 41 2 1 2hI ????? ? ? ? ? ? ? ? ? ? ? ????? 2 ? ? ? = 103cm 4 TI —— 空心板截面的抗扭剛度 沈陽工業(yè)大學(xué)本科畢業(yè)設(shè)計(jì) 4 圖 31 計(jì)算 TI 的空心板截面簡(jiǎn)化圖 ? ? ? ?? ? ? ?78992877027708994224 222122????????????tbthhbIT = 34131469156 3 1 5 0 . 4 7 1 0 c m1 5 . 7 3 2 6 ??? 沈陽工業(yè)大學(xué)本科畢業(yè)設(shè)計(jì) 5 第 4 章 作用效應(yīng)計(jì)算 永久作用效應(yīng) 空心板自重 ： 41 32 06 .3 10 25 2 kN /mhgA ? ?? ? ? ? ? ?。 空心板塊混凝土采用 C40； 橋面鋪裝采用 C30 瀝青混凝土； 欄桿及人行道板為 C25 混凝土。 ：汽車荷載：公路－Ⅱ級(jí)荷載：人群荷 載： 。 關(guān)鍵詞： 橋梁 ； 跨徑 ； 空心板 ； 預(yù)應(yīng)力 ； 結(jié)構(gòu) II Abstract Bridge is a road traffic in the important part. Economically, the cost of bridges and culverts, roads generally accounted for an average total cost of 10% 20%, especially in the modern highway and the city in the construction of viaducts, bridges not only on the size of the project is huge, but also is often the key to ensure that the opening line of the early Universe Bridge is through three specific programs meet the elected election, economy, structure size, structure, construction, aesthetic requirements to make several options, and finally through the technical, economic and other aspects of the prehensive parative optimal design is a secondary road on a simply supported prestressed hollow slab bridge, a single span of 15 meters, hollow section can not only reduce weight but also make good use of materials This design is divided into upper and lower structural design structural design of two parts. Superstructure design, first determine the type of bridge, structural design, the choice of slab layout and positioning, the bridge uses a prefabricated prestressed concrete hollow slab bridge, followed by the structure has been set according to the design and calculation of the assigned tendons. Including crosssectional dimension, calculation diagram to determine, calculation method, load calculation, force calculation and draw force diagram, affecting lines. Some structural requirements for checking a series of classes to determine the feasibility of the structure, if the calculation failed to redesign Substructure design, identified as gravity piers, pier caps and carried out the design of pier, there were basic checking, to meet the design requirements. Finally designed using CAD drawings to the construction and reinforcement for the construction described. Keywords: bridge； span； hollow slab； prestressed； structural III 目 錄 摘 要 ...........................................................................................................................I Abstract ......................................................................................................................... II 第 1 章 設(shè)計(jì)資料 .......................................................................................................... 1 第 2 章 構(gòu)造形式及尺寸選定 ...................................................................................... 2 第 3 章 空心板毛截面幾何特性計(jì)算 .......................................................................... 3 毛截面面積 ..................................................................................................... 3 毛截面對(duì)中心的慣矩 ..................................................................................... 3 第 4 章 作用效應(yīng)計(jì)算 .................................................................................................. 5 永久作用效應(yīng) ................................................................................................. 5 空心板自重： ...................................................................................... 5 橋面系自重： ...................................................................................... 5 絞縫自重 .............................................................................................. 5 可變作用效應(yīng)計(jì)算 ......................................................................................... 6 汽車荷載橫向分布系數(shù)計(jì)算 .............................................................. 6 汽車荷載沖擊系數(shù)計(jì)算 .................................................................... 10 可變作用效應(yīng)計(jì)算 ....................................................................................... 11 車道荷載效應(yīng) .................................................................................... 11 人群荷載效應(yīng) ..................................................................................... 13 作用效應(yīng)組合 ............................................................................................... 14 第 5 章 預(yù)應(yīng)力鋼筋數(shù)量估算及布置 ........................................................................ 17 預(yù)應(yīng)力鋼筋數(shù)量估算 ................................................................................... 17 預(yù)應(yīng)力鋼筋的布置 ....................................................................................... 19 普通鋼筋數(shù)量的估算及布置 ....................................................................... 19 第 6 章 換算截面幾何特性計(jì)算 ................................................................................ 22 換算截面面積 ............................................................................................... 22 換算截面重心位置 ....................................................................................... 22 換算截面的慣矩 ........................................................................................... 23 換算截面彈性抵抗矩 ................................................................................... 23 第 7 章 承載能力極限狀態(tài)計(jì)算 ................................................................................ 24 跨中截面正截面抗彎承載力計(jì)算 ............................................................... 24 IV 斜截面抗剪承載力計(jì)算 ....................................