桥梁工程毕业设计计算书解析

湖南科技大学

桥梁工程毕业设计（论文）

摘要

本设计为如海河桥主桥上部结构,本桥主跨度是33m+55m+33m，主梁截面为单箱三室，拱肋为钢管混凝土结构，吊杆为柔性吊杆。悬臂桥施工方法用平衡悬臂施工，拱肋钢管采用分段吊装方式施工。设计荷载为公路-Ⅰ级，设计抗震烈度7度。

主桥上部结构计算按施工阶段采用“桥梁博士V3.0”进行计算，结合工程实际情况，施工计算共分了39个受力阶段。设计中主桥按先边跨合拢，然后中跨合拢的顺序考虑，合拢温度严格控制在15~16℃。

拟定主梁纵、横断面尺寸；采用桥梁博士结构设计程序计算施工阶段和成桥后的主梁各控制截面的恒载内力、活载内力、温度内力及基础沉降引起的内力，分别按承载能力极限状态和正常使用极限状态进行荷载效应组合；估算预应力钢束数量并确定束数；布置钢束位置；对各控制截面进行强度、应力验算，各项验算均满足《公路钢筋混凝土及预应力混凝土桥涵设计规范》要求。

关键词：预应力混凝土梁拱组合桥；悬臂浇注施工；分段吊装施工；吊杆；作用效应组合；桥梁博士；

Q765978417

Abstract

The design is for the Ru-Hai-He bridge topside structure the span of which is 33m+55m +33m.and the section is single box girder cross-section of three rooms, rib of steel concrete structure, flexible boom. The cantilever bridge use the method of Balanced Cantilever construction ,Arch steel construction with sub-lifting means.As a result of the design load for one, we use seven for security.

Calculation of the main bridge structure used by the construction phase, "Dr. Bridges V3.0" calculated, combined with the actual situation in the project, construction of the calculation is divided into 39 by the power stage. The design of the bridge by the first side of the main cross-fold, after the lifting of the interim anchor, the last in order to consider cross-fold, close up to strictly control the temperature in the 15 ~ 16 ℃.

The development of the main longitudinal beams, cross-sectional size; the use of the structural design of the bridge, Dr. calculated into the construction phase and after the bridge girder cross-section of the control of internal forces of the dead load, live load internal forces, temperature, and the basis for the settlement of internal forces caused by internal forces, respectively, according to carrying capacity limit state and serviceability limit state load combination effects; to estimate the number of pre-stressed beam of steel and to determine the number of beam; layout steel beam position; cross-section of the control strength, stress check, the check are to meet the "Highway of reinforced concrete and prestressed Concrete Bridge Design Code "requirements.

Keywords: Prestressed concrete beam arch combination bridge; cantilever construction pouring;Break Erection; Tensioning;portfolio effect; Bridge Dr.

Q765978417

目录

第一章前言 (1)

第二章概述 (2)

2.1 设计依据及标准 (2)

2.1.1 设计标准 (2)

2.1.2 主要材料 (3)

2.1.3 桥面铺装 (4)

2.1.4 施工方式 (4)

2.2 桥型及纵、横断面设计 (4)

2.2.1 桥型布置及孔径划分 (4)

2.2.2 截面型式及截面尺寸拟定 (4)

2.3 毛截面几何特性 (6)

第三章内力计算 (7)

3.1 恒载内力的计算 (7)

3.1.1 施工方案施工顺序的确定 (7)

3.1.2 单元划分 (7)

3.1.3 恒载集度计算 (9)

3.1.4 恒载内力计算 (9)

3.2 内力影响线计算 (15)

3.3 活载内力计算 (21)

3.4 温度次内力计算 (35)

3.5 支座沉降次内力的计算 (41)

3.6 内力组合 (45)

第四章预应力钢束估算与布置以及吊杆张拉力的确定 (54)

4.1 钢束估算原理 (54)

4.1.1 按正常使用极限状态的应力要求计算 (54)

4.1.2 按承载能力极限状态的强度要求计算 (56)

4.2 钢束估算 (57)

4.3 钢束布置 (61)

4.3.1配筋数目的确定 (61)