一、概 述 刚架拱桥是交通部科学研究院和无锡县交通局在吸取其它桥型优点的基础上构思的新桥型,是轻型的推力结构。结构的主要承重构件大部分为压弯构件,主拱肋片除主梁段为变截面外,其余均为等截面杆件。桥面系作为结构的组成部分,并以横系梁增强横向联系和结构的整体性。主拱肋片可根据施工条件采用预制吊装或就地浇注。因此,具有构件少、自重轻、整体性好、刚度大、施工简便、经济指标较先进、造型美观等优点。我省选择应城县杨 I. Overview Rigid frame arch bridge is a new bridge type conceived on the basis of absorbing the advantages of other bridge types by the Scientific Research Institute of Ministry of Communications and Wuxi Bureau of Communications. It is a lightweight thrust structure. The structure of the main load-bearing components for the majority of the bending member, the main arch fins in addition to the main beam section for the variable cross-section, the rest are equal cross-section rod. Bridge deck as a component of the structure, and horizontal beam to enhance the horizontal connection and the integrity of the structure. The main arch rib can be prefabricated or cast in place according to the construction conditions. Therefore, with less components, light weight, good overall, rigidity, construction is simple, more advanced economic indicators, attractive appearance and so on. Yingcheng County, Yang selected my province