1 / 18 可伸缩桁架桥的设计系别：专业：姓名：学号：摘要论文内容主要包括： 对桁架桥的历史和发展的介绍，在设计的初期通过手算，对主桁的受力进行了分析，包括对主桁、平纵联、桥面系的结构设计计算 . 然后根据采用了桥梁规范和HA 两种加载方式对模型进行加载和进行计算，最后对计算结果做出分析并得出结论. 从而达到对桁架桥的强度验算的目的 . 关键词：折叠伸缩 桁架桥 结构设计、强度验算Abstract Paper content mainly includes：Introduces the history of steel truss bridge and the development of steel truss bridge，in the early design by hand to calculate， analyzes the main truss stress， including the main truss, flat longitudinal coupon, the structure design and calculation of bridge. In the final analysis, the result, and draw the conclusion. So as to achieve the purpose that calculating the intensity of steel truss bridge. Key words: folding ，retractable，truss bridge，structural design, intensity checking 目录1、绪论 ............................................................................................................................................ 21.1 课题的背景 ........................................................................................................................ 21.2 课题的内容 ........................................................................................................................ 22、桁架桥的总体设计 .................................................................................................................... 32.1 主桁的结构形式、基本尺寸及总体布置方案................................................................ 32.1.1主桁结构形式的选择............................................................................................ 32 / 18 2.1.2主桁的基本尺寸.................................................................................................... 42.2 桁桥的总体布置方案.......................................................
