大跨度上承式钢管混凝土拱桥拱顶桥面断缝研究

The Principal Long-span Arch Bridge of Concrete-filled Steel Tube Broken Seam on the Vault Deck

一座大跨度上承式钢管混凝土拱桥,拱顶一段设计为框架式结构,为了减小混凝土桥面板应力,框架段桥面每隔一定距离设一道断缝。本文主要研究拱顶框架段桥面断缝对全桥结构静力特性与动力特性的影响。结果表明,拱顶框架段桥面设置断缝可降低框架范围内桥面板的应力,但拱肋混凝土应力有所回增,时结构的动力特性影响不大。

Bid on a large-span arch bridge of concrete pipe, a section designed to vault framework structure, in order to reduce stress concrete bridge decks, the framework of the bridge located at a certain distance with broken joints. This paper studies the framework of the vaults broken joints on the bridge deck structure of static full-bridge with the dynamic characteristics of the impact. The results show that the framework of the deck vaults broken joints can be installed within the framework of the lower deck of stress, but stress has concrete arch back by the structure little effect on the dynamic characteristics.