毕业论文-51+72+51米预应力混凝土连续梁桥设计.doc

51+72+51米预应力混凝土连续梁桥设计 51+72+51米预应力混凝土连续梁桥设计 PAGE 2 PAGE 47 本科毕业设计 土木工程 51+72+51米预应力混凝土连续梁桥设计 The design of prestressed concrete of 51+72+51m Continuous Bridge  51+72+51米预应力混凝土连续梁桥设计 摘要：本设计为51米+72米+51米预应力混凝土变截面连续梁桥。变截面连续梁桥是我国使用较广泛的一种桥型。这种桥型具有外形美观，跨越能力大的特点。本设计采用三跨，标准跨径为174m，桥面净宽为2x（11.5+2x0.5）=25米。主要对桥的上部结构，正截面应力，弯矩，进行了设计与计算。通过本次设计，了解桥梁设计的一般过程，熟悉桥梁计算里面的几个重要因素，例如混凝土的收缩徐变，温度应力，支座的沉降，钢束的摩擦阻力，锚具的变形等。从而初步掌握桥梁的设计方法和思路。 关键词：变截面连续梁桥；正应力；弯矩。 The design of prestressed concrete of 51m+72m+51m Continuous Bridge Abstract: It is a design of prestressed concrete of non-uniform 51m+72m+51m continuous bridge.Non-uniform continuous bridge is widely used within china.The type of bridge is able to have a big span as well as a good sight.In this design,there are three totally spans,and the longth of the standard span is 174m,the clear width of the span is 25m.This paper mainly focus on the superstructure,cross-section stress and bending moment.Through this assignment,i am supposed to know the general process of bridge design,to be familiar with some important factors related to bridge design,such as the Shrinkage and Creep, the temperature stress,the settlement of the support,the resistance of friction,the deformation of the anchor device and so on.And thus i can have a general idea of how a bridge is designed and the guidelines in a designing project. Keywords:non-uniform continuous bridge;cross-section stress;bending moment. 目 录 TOC \o 1-3 \h \u HYPERLINK \l _Toc15883 1 工程说明 PAGEREF _Toc15883 1 HYPERLINK \l _Toc7063 1.1 方案简介 PAGEREF _Toc7063 1 HYPERLINK \l _Toc14283 1.1.1 主跨径的拟定 PAGEREF _Toc14283 1 HYPERLINK \l _Toc15385 1.1.2 纵向布置 PAGEREF _Toc15385 1 HYPERLINK \l _Toc32286 1.1.3 横截面设计 PAGEREF _Toc32286 1 HYPERLINK \l _Toc32305 1.2 其他介绍： PAGEREF _Toc32305 2 HYPERLINK \l _Toc21190 2 计算依据和内容 PAGEREF _Toc21190 3 HYPERLINK \l _Toc8457 2.1 计算依据 PAGEREF _Toc8457 3 HYPERLINK \l _Toc13037 2.2 计算内容 PAGEREF _Toc13037 3 HYPERLINK \l _Toc9509 3 技术标准 PAGE