体外预应力技术在连续钢箱梁桥中的应用

摘要:

随着桥梁预应力技术的日趋成熟,体外预应力技术作为后张预应力体系的重要分支之一也逐渐开始普及。目前,体外预应力技术已被灵活地运用于各种桥型结构的设计、加固,产生了许多高效快速的桥梁施工方法,但该技术与连续刚箱梁桥结合还较少。本文以上海市某桥为背景,采用有限元建模分析体外预应力技术在连续刚箱梁桥中的作用,为大跨径钢桥设计提供参考。

Abstract:

SWith the maturity of bridge prestressing technology external prestressing technology as an important branch of post-tensioning prestressing system is gradually becoming popular. At present, external prestressing technology has been flexibly applied to the design and reinforcement of various bridge structures, resulting in many efficient and fast bridge construction methods.The technology is seldom combined with continuous steel box girder Bridges. Taking a bridge in Shanghai as the background, this paper uses finite element modeling to analyze the role of external prestressing technology in continuous steel box girder bridge, providing reference for the design of long span steel bridge.