赵晓旭毕业设计.doc

摘要
随着湘潭莲城大桥通车运营,主桥桥面组合梁的一些不合理因素日益凸显,现进行湘潭莲城大桥主桥主跨桥面组合梁优化设计。本方案整体思想是变更主拱圈在横向桥面的位置,由原方案中主拱圈位于桥面人行道外侧变更为主拱圈内移到人行道内侧以实现主桥主跨组合梁优化设计,并于主拱肋与桥面交汇处设置向外伸出的弧形观景台。优化后的主桥主跨桥面系较原方案有外形和谐、节省材料、优化结构受力等诸多优点。
本次毕业设计涉及的内容为桥面系的优化设计,涉及的知识面较广,能充分培养自己所学知识的综合应用能力。本次毕业设计内容涉及的知识有力学、结构设计原理、桥梁工程等专业知识,还有计算机应用、CAD绘图等方面的知识及大量设计规范及有关公路桥梁标准图。通过本次毕业设计真正熟练掌握各门所学专业知识,提高了所学知识的综合应用能力并锻炼了自己自学能力。
本次毕业设计具有较大难度,设计时间很仓促,。
关键词:莲城大桥;桥面优化;规范。
ABSTRACT
As the opening to traffic operation of Lian Cheng Bridge of Xiangtan city, posite beam of main deck appeared various unreasonable aspects. In this thesis, we devote our attention to optimize the bridge'posite main idea is to change the location of main arch ring. Instead of the phenomena that the main arch ring was located outside of the sidewalk,we try to put the ring inside and set a protrusive arc observation deck at the junction of main arch rib and the bridge floor. If all these could have been done, the main span bridge floor system would be more harmonious on its appearance,material saving and improved on the structure's internal force.
The main contents of this thesis are optimization of the bridge floor system, which involve extensive relative knowledge such as mechanics, structural design principle, bridge engineering professional knowledge puter application, CAD. By writing the graduation design,I really grasp skills and improve abilities prehensive application of knowledge and self-study.
Considering the fact that the content of this thesis is difficult and the time is very hasty, I met many difficulties in the process of design. I would like to thank Mrs Shu and Chen Hongbing ,Wang Zhimei for their advice and help.
Keywords: Continuous girder bridge; cross-section; standard
目录
第一章前言 1
第二章工程概况 2
工程概述 2
设计规范 2
主要设计技术指标 2
主要材料 3
第三章桥梁结构基本尺寸设计 4
优化方案:主拱结构布置和横梁布置 4
主跨桥面结构尺寸设计 4
第四章结构模型及计算参数 6
结构离散化的基本原则 6
结构离散化的基本原则 7
简化模型的选择 7
桥梁结构分