跨徑20m主梁全長(zhǎng)1996m橋梁凈寬7米預(yù)應(yīng)力混凝土T形橋

1、摘 要本次設(shè)計(jì)的題目預(yù)應(yīng)力混凝土 T型梁橋的設(shè)計(jì)。本設(shè)計(jì)采用預(yù)應(yīng)力混凝土 T型梁橋，跨徑布置為（4x20）m,主梁為變 截面T型梁?？缰辛焊邽?.33m，支點(diǎn)梁高為1.33m。橋墩為重力式橋墩、橋 臺(tái)。本文主要闡述了該橋的設(shè)計(jì)和計(jì)算過(guò)程。首先進(jìn)行橋型方案比選，對(duì)主橋 進(jìn)行總體結(jié)構(gòu)設(shè)計(jì)，然后對(duì)上部結(jié)構(gòu)進(jìn)行內(nèi)力、配筋計(jì)算，再進(jìn)行強(qiáng)度、應(yīng)力及 變形驗(yàn)算，最后進(jìn)行下部結(jié)構(gòu)驗(yàn)算。具體包括以下幾個(gè)部分：橋型方案比選；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；預(yù)應(yīng)力損失計(jì)算；截面強(qiáng)度驗(yàn)算；截面應(yīng)力及變形驗(yàn)算；下部結(jié)構(gòu)驗(yàn)算。關(guān)鍵詞：預(yù)應(yīng)力混凝土T型簡(jiǎn)支梁橋

2、 重力式橋墩 重力式橋臺(tái)ABSTRACTThis design is of the same section about the PingYuan StreetSuoLong Monastery 11 free way contracts to local farmland Road 1 (K0+288.50) Prestressed Concrete t-shaped supported beam bridge design.The bridge belongs to the prestressed concreted structuer which is a simple supporte

3、d beam bridge.The span arrangement is (4X20) m.The superstructure is variable T shaped supported beam bridge.The height of the girder on the support is1.33m,and the height of the middle is 1.33m too.The pier is gravity pier. The abutment is gravity abutment.This essay focuses on the design and calcu

4、lation process of the bridge.Firstly,compare and choose a best scheme from several bridge types;and make an overall structure design of the main span.Secondly perform the calculation of the internal force and reinforcing bar on the superstructure.Thirdly,check the intensity,stress and deflection.Fin

5、ally,check the substructure.The main points of the design are as the follows.The comparison of several bridge types;The arrangement of the bridge types;The units partition of the structute;The calculation of the internal force of dead load;The calculation of the internal force of movable load;The co

6、mbination of every kind of load;The arrangement of prestressed reinforcing bar;The calculation of the prestressed loss;The check of the section intensity;The check of the section stress and deflection;The check the substructure.Keywords: Prestressed conctete T shaped supported beam bridge Gravity pierGravity abutment目 錄 TOC o 1-5 h z 一、工程概況及方案比選 1（一）概述1（二）工程概況1（三）方案比選6二、主梁設(shè)計(jì)8（一）設(shè)計(jì)概況及構(gòu)造布置8（二）橫截面布置8（三）梁毛截面幾何特性計(jì)算 10（四）主梁內(nèi)力計(jì)算16（五）預(yù)應(yīng)力鋼束的估算及其布置33（六）主梁截面幾何特性計(jì)算 39（七）鋼束布置位置（束界）的校核 41（八）鋼束預(yù)應(yīng)力損失估算43 TOC o 1-5 h z （九）預(yù)加應(yīng)力階段的正截面應(yīng)力驗(yàn)算 4843（十）使用階段的正應(yīng)力驗(yàn)算49（十一）使用階段的主應(yīng)力驗(yàn)算 51（十二）截面強(qiáng)度計(jì)算 58（十三）錨固區(qū)