DOC《南京林业大学》

南京林业大学本科毕业论文 题目:自锚式悬索桥主塔结构设计与分析 学院: 南方学院专业:土木工程 (交通土建方向) 学号: N080606127 学生姓名: 杨杰指导教师: 李建慧职称: 讲师二O一二年五月十五日摘要通过对南京市江宁区小龙湾大桥桥塔结构的设计情况的简单介绍,论述了桥塔计算的主要内容.

主塔结构总高35.4m,其中桥面以上结构高22.6m,为C40钢筋混凝土结构. 本设计以悬索桥设计基本理论和静动力分析为理论基础,以成功修建的悬索桥为例,根据桥梁的位置、布置形式,拟定桥梁的跨度、矢高、吊杆间距、锚索倾角、桥塔高度和截面、塔基形式、锚碇构造等,说明选择相关参数的过程、依据、和考虑的主要因素. 桥塔用C40钢筋混凝土,本桥相对悬索桥跨度较小,设计考虑恒载、风荷载和温度荷载,人行荷载,不考虑地震荷载. 由于悬索桥是超静定结构,计算较为烦琐,故在该设计中,结构单元划分和内力计算采用专业设计软件桥梁博士进行,计算方法为有限元法,使设计工作量大大的简化,内力求出后,根据桥梁规范进行结构内力组合.最后,按容许应力法和极限状态法来验算主要截面,以判定设计的合理性. 关键词:小龙湾大桥、桥塔、内力分析 Abstract Through to the Nanjing city Jiangning District Longwan bridge pylon structure design situation briefly, discusses the main content of tower calculation. The design of the suspension bridge design theory and the static and dynamic analysis for the theoretical basis, to the successful construction of the suspension bridge as an example, according to the bridge location, layout, make the span of bridge, suspender anchor spacing, rise, inclination, tower height and cross-section, base form, anchor structure, choose the related parameters in the process, basis, and the main factor of the consideration Tower of reinforced concrete bridge with C40, the relatively small span of suspension bridge, design considerations of constant load, wind load and temperature load, live load for steam - I and pedestrian load, without regard to earthquake load. As a result of suspension bridge is a statically indeterminate structure, calculation is complex, so the design of the structure internal force calculation, unit division and the professional design software bridge doctor, for the finite element method, so that the design of the workload is greatly simplified, the internal force of bridge, according to the norms of the structure endogenic force combination. Finally, according to the allowable stress method and the limit state method to checking the main section, in order to judge the rationality of the design Key words: Longwan bridge, pylon, internal force analysis 目录

第一章 绪论11.1工程概况

1 1.1.1工程设计依据

2 1.1.2设计采用规范

2 1.1.3主要技术标准

2 1.1.4工程沿线自然地理特征

3 1.2 自锚式悬索桥主塔设计与分析综述

4 1.2.1自锚式悬索桥发展综述

4 1.2.2国内外悬索桥发展史

5 1.2.3自锚式悬索桥主塔结构设计与分析综述

7 1.2.4 小结

7 1.3本文所做内容

7 1.4本次毕业设计的意义

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第二章 模型计算

9 2.1 桥梁博士软件介绍

9 2.2 Auto CAD介绍

10 2.3小龙湾大桥主塔建立模型

10 2.3.1施工阶段划分

10 2.3.2建立模型过程

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第三章 小龙湾主塔结构设计

15 3.1方案构思

15 3.2基本资料

15 3.2.1计算软件