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摘要：桥梁是供汽车、火车、行人等跨越障碍（河流、海湾、湖泊、山谷或其他线路等）的建筑物。近现代以来，我国的桥梁建设发展迅速。先后建成了各种大跨径桥梁。而拱桥的发展同样迅速，拱桥造型宏伟壮观，且经久耐用。拱式结构在竖向荷载作用下，将会产生水平推力，可使拱体的弯矩大为减下。拱桥很适应于山区地区，其中尤以重庆万州长江大桥为例，充分发挥了拱桥优势，因此对拱桥的研究很有必要。30114
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钢管混凝土拱桥起步较晚，但其发展速度很快。分析认为与刚拱桥相比，钢管混凝土拱桥可节约刚才52%，降低造价20%。应用钢管混凝土修建的拱桥，根据钢管混凝土的两种材料在受力和施工中的作用，可分为两大类型。一种为钢管内填混凝土，既钢管表皮外漏，与核心混凝土共同作为结构的主要受力组成部分。狭义上的钢管混凝土拱桥即指这类拱桥。钢管混凝土拱桥在短短的十余年内在中国得到如此迅速的发展，无论是在世界桥梁史上还是在中国桥梁史上都是一个十分特殊的现象。但目前我们还是面临着严峻的问题。针对早期建成的钢管混凝土拱桥所暴漏出来的一些问题，应加紧研究对策。通过合理的使用管理与养护，使其交通功能正常发挥、甚至得到一定的改善，延长结构的使用寿命。论文网
本次设计的内容为昆山市正阳大桥的设计，在方案对比阶段，初选三个方案。分别为简支梁、连续梁和柔性系杆刚性拱。经过多方面比较对比，最终选定柔性系杆刚性拱为最终方案。本桥跨径为110米，矢高22米，矢跨比为1/5。拱肋为钢管混凝土。经计算后，桥梁验算通过。
毕业论文关键词: 系杆刚性拱；系梁；预应力；现浇。
Design of Zhengyang bridge (arch bridge) in Kunshan City
Abstract：Bridges are structures that span obstacles (rivers, bays, lakes, valleys or other routes) for cars, trains, pedestrians, etc. In recent years，because of China's rapid development of bridge construction. It has built a variety of long-span bridge. And the development of the arch bridge is also fast, the arch bridge modeling is magnificent, and durable. Under vertical load，arch structure will produce horizontal thrust it can be greatly reduce bending moment. The arch bridge is suitable for mountainous areas, especially in Wanzhou Yangtze River Bridge, the advantages of arch bridge are fully played, so the research on Arch is necessary.
In China, a relatively strong national economic development, bridge construction has made brilliant achievements. One of the most representative comes built in 606 AD Hebei Zhaoxian Anji Bridge. Concrete filled steel tubular arch bridge starts late, but its development speed is very fast. The analysis thinks that compared with the rigid arch bridge, the Concrete filled steel tubular arch bridge can save 52% and
reduce the cost 20%. The arch bridge constructed by steel tube concrete can be pided into two types according to the action of the two kinds of materials in the force and the construction. One is filled with concrete filled steel tubes, the outer leakage of the steel tube is outside the core, and the core concrete is the main force component of the structure. The concrete filled steel tube arch bridge is this kind of arch bridge. The concrete filled steel tube arch bridge has been developed rapidly in ten years, whether in the history of the world bridge or in the history of Chinese bridges. But now, we are facing a serious problem. In view of some problems that the early completion of the steel tube concrete arch bridge, should intensify countermeasures. Through the reasonable use of management and maintenance, make the traffic function of normal play, even get some improvement, prolong the structure of service life.
The design of the content is the Zhengyang Kunshan bridge design. In the scheme comparison stage, there are three programs. Simply supported beam, continuous beam, rigid flexible tied arch respectively. After many comparative contrast, the final selection of the rigid flexible tied arch for the final program. The bridge span is 110 meters, 22 meters high vector, span ratio of 1/5. Rib steel pipe concrete. After calculation, bridge checking through.