桥梁预拱度设置牵涉到行车安全与舒适,是结构设计工作中一个必不可少的环节。目前国内针对钢桁梁的拱度设计研究相对较少,起拱方式也较为单一。本文总结了目前桁梁常用的几种起拱方式,探讨了各种起拱方式存在的优缺点和各自的适用性,提出多种起拱方式相互结合的设计理念,并以工程实例说明,多种方式结合的设计方案可以获得较为理想的拱度曲线,为该类桥梁共度设计提供新的思路。 Pre-camber setting of the bridge involves driving safety and comfort, and is an indispensable part of the structural design work. At present, the research on the crown design of steel truss girders is relatively few in China, and the arching method is relatively simple. This paper summarizes the commonly used several arch-ways for truss girders, discusses the advantages and disadvantages of various arch-ways and their respective applicability, and proposes a variety of design concepts of arch-ways combined with each other. The project example shows that more The combination of the kinds of ways the design scheme can obtain the ideal camber curve, to provide new ideas for the design of such bridges.