簡支箱型橋梁設計(編輯修改稿)
2025-09-01 15:33 本頁面
【文章內(nèi)容簡介】 ...................................................................93...............................................................................................................94致謝..........................................................................................................................................96參考文獻......................................................................................................................................97附錄英語翻譯......................................................................................................................98 摘要 連續(xù)梁橋是工程上廣泛使用的一種橋型，它不但具有可靠的強度、剛度及抗裂性，而且具有行車舒適平穩(wěn)，養(yǎng)護工作量小，設計及施工經(jīng)驗成熟的特點。設計一座橋梁必須從橋跨布設，尺寸擬定，鋼束布置以及施工方法等方面綜合考慮，還要充分考慮設計參數(shù)和環(huán)境影響。本設計是五跨連續(xù)梁橋，截面形式為四片單箱單室預制箱型梁，縱向橫截面；施工方式是先簡支后連續(xù)施工的連續(xù)梁橋。該設計首先進行恒載、活載及次內(nèi)力的計算，在此基礎上進行荷載組合，繪制彎矩和剪力包絡圖；其次，根據(jù)短期效應組合配置預應力鋼筋，并進行預應力損失的計算；最后，對連續(xù)梁橋進行驗算，是否滿足設計要求。關鍵詞：設計；連續(xù)梁橋；先簡支后連續(xù)；預應力Abstract The continuous beam bridge is a kind of bridge type used widely on the not only has a reliable strength,stiffness and cracking,but also has a smooth journeyfortable,conservation work on the design and construction experience of the characteristics of a bridge must be laid across from the bridgelaying,the size of the development,steel beam layout and construction methods,but also give full consideration to the design parameters and environmental is a design for a fivespan continuous bridge,whose crosssection is onepartment and no changing on the road direction,constructed by after a first first design includes constant load,the live load and the calculation of the internal the basis of a load bination,we can draw moment and shear envelope ,according to the shortterm effect bination disposition prestressed reinforcement,and carries on the loss of prestress the ,carries on the checking calculation to this continuous bridge,whether to satisfy the design requirements. Key Words: design。 continuous bridge。 after a first simplysupported。 prestress 緒論預應力混凝土連續(xù)梁橋以結構受力性能好、變形小、伸縮縫少、行車平順舒適、造型簡潔美觀、養(yǎng)護工程量小、抗震能力強等而成為最富有競爭力的主要橋型之一。本章簡介其發(fā)展：由于普通鋼筋混凝土結構存在不少缺點：如過早地出現(xiàn)裂縫，使其不能有效地采用高強度材料，結構自重必然大，從而使其跨越能力差，并且使得材料利用率低。為了解決這些問題，預應力混凝土結構應運而生，所謂預應力混凝土結構，就是在結構承擔荷載之前，預先對混凝土施加壓力。這樣就可以抵消外荷載作用下混凝土產(chǎn)生的拉應力。自從預應
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