【摘要】：隨著生產(chǎn)力水平的逐步提高,橋梁結(jié)構(gòu)在數(shù)量上大力發(fā)展的同時,也對美觀性提出了要求。目前的橋梁跨越能力在逐步提高,新型材料的使用更加頻繁,結(jié)構(gòu)形式向多樣化發(fā)展。組合式體系橋梁結(jié)構(gòu)在適用性和美觀性方面的優(yōu)勢,使其應(yīng)用廣泛。對該類橋型設(shè)計、施工關(guān)鍵技術(shù)的研究,對該類橋型的推廣應(yīng)用,有重要的意義。本文針對V墩三角剛架無系桿懸吊連續(xù)梁組合體系橋的特點,從設(shè)計和施工方面對其進(jìn)行研究,為類似結(jié)構(gòu)的設(shè)計和施工提供借鑒。針對橋址的環(huán)境特點,構(gòu)思了異型系桿拱橋和多點彈性支撐連續(xù)梁橋兩種組合橋型方案,通過對比論證,多點彈性支承連續(xù)梁(剛梁柔索)方案進(jìn)行橋梁設(shè)計。對比了三角剛架懸吊連續(xù)梁組合體系、V形剛構(gòu)體系和連續(xù)梁結(jié)構(gòu)下的結(jié)構(gòu)性能。對房山五渡橋的主墩、主梁、剛架(主塔)、吊桿、限位阻尼裝置等局部結(jié)構(gòu)的設(shè)計進(jìn)行了研究。根據(jù)設(shè)計結(jié)構(gòu)尺寸,對該橋的變形、應(yīng)力和索力進(jìn)行了有限元分析。驗證本方案以連續(xù)梁橋受力為基礎(chǔ),通過在主梁跨中設(shè)置吊桿來減小活載對梁體的作用,減小活載對主梁的變形影響;V墩增跨措施減小梁體內(nèi)力進(jìn)而減小截面尺寸和配筋。針對V墩三角剛架無系桿懸吊連續(xù)梁組合體系橋的結(jié)構(gòu)特點,創(chuàng)立了傾斜型內(nèi)錨預(yù)壓式鋼-混結(jié)合段精細(xì)化施工工藝,實現(xiàn)了帶高強(qiáng)螺栓預(yù)壓力的傾斜型鋼-混凝土結(jié)合段的順利施工。通過開發(fā)鋼框架組合模板定型產(chǎn)品和與之配套的施工技術(shù),解決了大體積V型墩施工問題。研究了剛塔架預(yù)制、吊裝、焊接的施工關(guān)鍵技術(shù),對安全度汛措施進(jìn)行了優(yōu)化。
[Abstract]:With the gradual improvement of productivity level, the bridge structure develops energetically in quantity, but also puts forward the request for aesthetics. At present, the bridge span capacity is gradually improved, the use of new materials is more frequent, and the structural forms are diversified. The advantages of composite bridge structure in applicability and aesthetics make it widely used. The research on the key technology of design and construction of this kind of bridge is of great significance to the popularization and application of this kind of bridge. In view of the characteristics of V-pier triangular rigid frame bridge without tie rod suspension continuous beam composite system bridge, the design and construction of the bridge are studied in order to provide reference for the design and construction of similar structures. In view of the environmental characteristics of the bridge site, two kinds of combined bridge schemes are conceived, which are irregular tied arch bridge and multi-point elastic support continuous beam bridge. Through comparison and demonstration, the multi-point elastic support continuous beam (rigid beam flexible cable) scheme is designed. The structural properties of suspension continuous beam system with triangle rigid frame, V rigid frame system and continuous beam structure are compared. The design of main pier, main beam, rigid frame (main tower), suspender and limit damping device of Fangshan Wudu Bridge is studied. The deformation, stress and cable force of the bridge are analyzed by finite element method. It is verified that this scheme is based on continuous beam bridge, by setting suspenders in the main beam span to reduce the effect of live load on beam body, and reducing the influence of live load on the deformation of main beam, and reducing the internal force of beam body by increasing the span of V pier and then reducing the section size and reinforcement. According to the structural characteristics of V-pier triangulated rigid frame suspension continuous beam composite bridge without tie bar, the fine construction technology of steel-concrete composite section with inclined internal anchor preloading is established. The smooth construction of inclined steel-concrete joint section with high-strength bolt pre-pressure is realized. The construction problem of large volume V-shaped pier is solved by developing steel frame composite formwork and matching construction technology. The key construction techniques of precast, hoisting and welding of the rigid tower are studied, and the safety flood control measures are optimized.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U445.4

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