30m預(yù)應(yīng)力簡(jiǎn)支T型梁橋設(shè)計(jì)

目錄
摘要 I
ABSTRACT II
第1章 設(shè)計(jì)內(nèi)容及構(gòu)造布置 1
1.1 設(shè)計(jì)內(nèi)容 1
1.2 方案比選 2
1.3 橫截面布置 4
1.4 橫截面沿跨長(zhǎng)的變化 7
1.5 橫隔梁的設(shè)置 7
第2章 主梁內(nèi)力計(jì)算 7
2.1 恒載內(nèi)力計(jì)算 7
2.2 活載內(nèi)力計(jì)算 10
2.3 主梁內(nèi)力組合 18
第3章 預(yù)應(yīng)力鋼束的估算以及布置 19
3.1 跨中截面鋼束的估算與確定 19
3.2 預(yù)應(yīng)力鋼束布置 19
3.3 非預(yù)應(yīng)力鋼筋截面積估算及布置 24
第4章 計(jì)算主梁截面幾何特性 24
4.1 主梁預(yù)制并張拉預(yù)應(yīng)力鋼筋 25
4.2 灌漿封錨，主梁吊裝就位并現(xiàn)澆300MM濕接縫 25
4.3 橋面、欄桿施工和運(yùn)營(yíng)階段 26
第5章 鋼束預(yù)應(yīng)力損失計(jì)算 27
5.1 預(yù)應(yīng)力鋼束與管道壁之間的摩擦引起的預(yù)應(yīng)力損失 27
5.2 由錨具變形、鋼束回縮引起的損失 28
5.3 混凝土彈性壓縮引起的損失 29
5.4 由鋼束應(yīng)力松弛引起的損失 30
5.5 混凝土收縮和徐變引起的損失 31
5.6 預(yù)應(yīng)力內(nèi)力計(jì)算及鋼束預(yù)應(yīng)力損失匯總 32
第6章 主梁截面驗(yàn)算 32
6.1 截面應(yīng)力驗(yàn)算 33
6.2 抗裂性驗(yàn)算 37
第7章 錨固區(qū)局部承壓驗(yàn)算 39
第8章 主梁變形驗(yàn)算 41
8.1 荷載短期效應(yīng)作用下主梁撓度驗(yàn)算 41
8.2 預(yù)加力引起的上拱度計(jì)算 42
8.3 預(yù)拱度的設(shè)置 43
第9章 橫隔梁計(jì)算 43
9.1 確定作用在跨中橫隔梁上的計(jì)算荷載 43
9.2 跨中橫隔梁的內(nèi)力影響 44
第10章 行車道板計(jì)算 47
10.1 懸臂板荷載效應(yīng)計(jì)算（邊梁） 47
10.2 鉸接懸臂板荷載效應(yīng)計(jì)算（中梁） 48
參考文獻(xiàn) 52
致謝 53
 

摘要：目前，預(yù)應(yīng)力混凝土被廣泛的使用于各種中小跨度的橋梁中，而且大量采用預(yù)應(yīng)力混凝土將是未來(lái)橋梁發(fā)展的趨勢(shì)。在本次畢業(yè)設(shè)計(jì)中，對(duì)目前在公路橋梁中經(jīng)常使用的預(yù)應(yīng)力混凝土簡(jiǎn)支T型梁橋的設(shè)計(jì)做了全面的介紹，其中包括調(diào)研，外文資料的翻譯，方案設(shè)計(jì)，結(jié)構(gòu)計(jì)算以及施工圖的繪制，并對(duì)預(yù)應(yīng)力混凝土梁橋的特點(diǎn)做了詳細(xì)的介紹。在確定方案時(shí)，根據(jù)調(diào)研及查閱大量的資料，在此橋位上布置了鋼管混凝土橋，鋼筋混凝土箱型拱橋及預(yù)應(yīng)力混凝土簡(jiǎn)支T型梁橋三種設(shè)計(jì)方案，根據(jù)“安全，功能，經(jīng)濟(jì)，美觀”的原則，對(duì)各種橋型的優(yōu)缺點(diǎn)進(jìn)行了比選，而預(yù)應(yīng)力混凝土簡(jiǎn)支T型梁橋在此橋位上更具有競(jìng)爭(zhēng)力，反映在工程造價(jià)比較低，施工工期短，施工技術(shù)成熟，因此，最終選擇了預(yù)應(yīng)力混凝土簡(jiǎn)支T梁橋?yàn)樵O(shè)計(jì)方案。 結(jié)構(gòu)計(jì)算著重進(jìn)行了上部結(jié)構(gòu)的計(jì)算，包括截面尺寸的擬定，內(nèi)力計(jì)算（恒載內(nèi)力，活載內(nèi)力和附加內(nèi)力的計(jì)算，內(nèi)力組合以及影響線），配筋設(shè)計(jì)，施工階段和使用階段的應(yīng)力驗(yàn)算，承載能力極限狀態(tài)強(qiáng)度驗(yàn)算，剛度驗(yàn)算，變形驗(yàn)算。
通過(guò)本次畢業(yè)設(shè)計(jì)，進(jìn)一步加深了我對(duì)橋梁以及預(yù)應(yīng)力混凝土的認(rèn)識(shí)。

關(guān)鍵詞：   預(yù)應(yīng)力混凝土   T型梁橋   結(jié)構(gòu)計(jì)算  設(shè)計(jì)方案    施工圖

The design and calculation of Fantang Bridge
--the design of a T section pre-stressed 
concrete beam with simply supported bridge in 30m span

Abstract: Nowdays, the pre-stressed concrete is extensively used in various kinds of bridges with medium and small span ,and it will be a development trend in future to adopt the bridge of the pre-stressed concrete in a large amount.In this paper,I made an overall introduction of the pre-stressed T-section concrete beam bridge which is ofen used among highway at present. Including investigation and research,translation,scheme design ,calculation of structure and drawing. According to the investigation, I give three schemes--the steel tube filled concrete,the reinforced concrete arch bridge and T-section beam with pre-stressed concrete bridge. According to the principle of “safe,capability,economical,artistic”, I choose the T-section beam bridge with pre-stressed concrete finally.The calculation of structure mainly includes the superstructure such as the size design of the section , the internal force calculation ,the steel bars calculation ,the stress and intensity and displacement.
Through this graduation design, my understanding of the pre-stressed concrete are strengthened further .

Keywords: pre-stressed concrete, T-section bridge ,steucture calculation ,construction design