平山冶河大桥设计 桥梁毕业设计.doc

摘要 本次设计的题目为平山冶河大桥设计，本设计采用预应力混凝土箱型梁桥，跨径布置为3×45m，主梁为变截面箱型梁。跨中梁高为1.60m，支点梁高为1.60m。桥墩为重力式桥墩、桥台。 本文主要阐述了该桥的设计和计算过程。首先进行桥型方案比选，对主桥进行总体结构设计，然后对上部结构进行内力、配筋计算，再进行强度、应力及变形验算。 具体包括以下几个部分： 1. 桥型方案比选； 2. 桥型布置，结构各部分尺寸拟定； 3. 选取计算结构简图； 4. 恒载内力计算； 5. 活载内力计算； 6. 荷载组合； 7. 配筋计算； 8. 预应力损失计算； 9. 截面强度验算； 10. 截面应力及变形验算； 关键词：预应力混凝土；箱型简支梁桥；计算；验算 Abstract This design is of the same section about the Prestressed Concrete box-shaped supported beam bridge design. The bridge belongs to the prestressed concreted structure which is a simple supported beam bridge.The span arrangement is 3×45 m.The superstructure is variable Box shaped supported beam bridge.The height of the girder on the support is1.60m,and the height of the middle is 1.60m too.The pier is gravity pier. The abutment is gravity abutment. This essay focuses on the design and calculation process of the bridge.Firstly,compare and choose a best scheme from several bridge types;and make an overall structure design of the main span.Secondly perform the calculation of the internal force and reinforcing bar on the superstructure.Thirdly,check the intensity, stress deflection.Finally,check the substructure.. The main points of the design are as the follows. 1.The comparison of several bridge types; 2.The arrangement of the bridge types; 3.The units partition of the structure; 4.The calculation of the internal force of dead load; 5.The calculation of the internal force of movable load; 6.The combination of every kind of load; 7.The arrangement of prestressed reinforcing bar; 8.The calculation of the prestressed loss; 9.The check of the section intensity; 10.The check of the section stress and deflection; Keywords: Prestressed concrete;Box-shaped supported beam bridge; Calculating computations;Checking computations 目 录 摘要 I Abstract II 前言 1 第1章 原始资料、设计要求及方案比选 2 1.1 概述 2 1.2 原始资料 2 1.3 设计要求 2 1.4 方案比选 3 第2章 设计资料及构造布置 6 2.1 设计资料 6 2.1.1 桥面跨径及桥宽 6 2.1.2 设计荷载 6 2.1.3 材料及工艺 6 2.1.4 设计依据