混凝土斜拉桥毕业的设计正文.doc

鄂州市方家园桥设计 摘 要 斜拉桥，又称斜张桥，是指一种由一条或多主塔与钢缆组成来支撑桥面的桥梁。是由承压的塔，受拉的索和承弯的梁体组合起来的一种结构体系。其可看作是拉索代替支墩的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。斜拉桥是我国大跨径桥梁最流行的桥型之一。目前为止建成或正在施工的斜拉桥共有30余座，仅次于德国、日本，而居世界第三位。而大跨径混凝土斜拉桥的数量已居世界第一。本设计为墩、塔、梁固结的塔双索面预应力混凝土斜拉桥，选择桥梁专用软件 可视化结构计算软件来建模分析，先采用刚性支承连续梁计算在自重作用下成桥状态斜拉索的受力，从而设计出拉索的截面尺寸，斜拉索全部安装后，一次性整体张拉到位，无需进行索力的二次调整。进而建立整体结构模型，计算该桥在自重、汽车的作用效应。然后进行主梁的作用效应组合，并估算预应力筋。 Design of Ezhou City home bridge Abstract The cable-stayed bridge, cable-stayed bridge and mean one by one or more of the main tower and wire to support the bridge deck. Is by the pressure of the tower, the tension of cable and the combination of curved beam element is a structural system. It is considered to be a lasso instead of piers across more elastic support continuous beam. It can reduce beam bending moment in the body, reduce the building height, reduced the weight of the structure, saving materials. Cable-stayed bridge is composed of towers, girders and cables. Cable-stayed bridge is one of the most popular bridge long-span Bridges in our country. So far built or under construction of cable-stayed bridge with a total of more than 30 seats, second only to Germany, Japan, and the third world. And the number of long-span concrete cable-stayed bridge has been the first in the world. This design for consolidation of the twin towers ShuangSuoMian pier, tower and beam prestressed concrete cable-stayed bridge, bridge choose specialized software VSES visual structure calculation software for modeling analysis, first by rigid support continuous Liang Fa calculation under the action of gravity into the bridge state of cable, so as to design the section size of cable, all cables installed, one-time whole tensioning in place, the need for cable force of the second adjustment. To establish the overall structure model, the calculation on the effects of gravity, car. Then the effects of main girder, and estimate the prestressed reinforcement. Key Words: Cable-stayed bridge； St