道路与桥梁工程概论论文.doc

道路和桥梁工程概论论文
——浅谈斜拉桥基础概况及发展前景
摘要：斜拉桥是将主梁用很多拉索直接拉在桥塔上一个桥梁，是一个由塔、梁、索三种基础构件组成组合桥梁结构体系，可看作是拉索替换支墩多跨弹性支承连续梁。其可使梁体内弯矩减小，降低建筑高度，减轻了结构重量，节省了材料。斜拉桥由索塔、主梁、斜拉索组成。斜拉桥在现在全部桥型中含有鲜明特征和优势。在此浅述相关斜拉桥发展历程和建造技术关键点，和斜拉桥在世界桥梁发展史上地位和发展前景。
关键字：跨径 结构体系 结构 建筑美学
Abstract：With many girder cable-stayed bridge is will draw directly lasso in bridge tower bridge, is a kind of by a tower, beams, cable three basic components combination bridge structure system, can be considered a lasso more instead of a pier across the elastic supporting continuous beam. It can make the beam is reduced, reduce body bending moment the height and reduce the weight, saving material structure. Cable-stayed bridge by cable tower, girders, composed stay-cables. Cable-stayed bridge in the present in all the distinctive characteristics and advantages. In the light of the development process and relevant cable-stayed bridge built technological essencials, as well as in world history of cable-stayed bridge bridge the status and development prospects.
Key Words： span structure
structural system architectural aesthetics
正文：
身处三大，身在宜昌这个坐落在长江之滨魅力城市，自然和跨江桥梁组成了密不可分关系。夷陵长江大桥，作为宜昌近几年新地标，见证了宜昌十年来发展史。夷陵长江大桥是一座是长江上唯一一座三塔倒Y型单索面混凝土加劲梁斜拉桥，其跨度在同类桥梁中为世界之最。大桥在建设中前后利用了20项新技术、新材料、新工艺。
桥梁已经成为了和我们生活密不可少生活建筑，斜拉桥作为近代兴起一个桥型，含有她自己独特美感和视觉享受。
一、斜拉桥演变历史
斜拉桥源于吊索桥。从斜拉桥演变历史能够表明，在很早以前大家就掌握了从塔架上悬吊斜拉索来支撑梁知识。中国是世界上最早有吊桥国家之