轻型智能预应力开启桥的设计探讨  

Discussion on Design of Light Smart-prestressed Bascule Bridges

作　　者：徐伟炜[1] 吕志涛[1] 丁汉山[1] 

机构地区：[1]东南大学土木工程学院,南京210096

出　　处：《特种结构》2007年第2期87-89,共3页Special Structures

基　　金：国家自然科学基金项目(编号:50378015)资助

摘　　要：轻型开启桥的设计是以尽可能减少开启部分的结构重量为目标的。与传统开启桥相比,它采用无背索斜塔斜拉桥作为其开启结构,并采用移动开合压重作为其开合方式。本文提出了该类开启桥的两种开合方式,使用接触弹簧对其进行辅助开合,同时对智能预应力体系在控制结构变形方面进行了探讨。The light bascule bridge is a new kind of bridge with the aim of reducing the weight of bascule structure. Comparing with the traditional bascule bridge, cable-stayed bridge without backstays as its bascule structure and moving ballast as its opening-closing mode are choosed with it. This article puts forward two kinds of opening-closing mode, and uses touch-spring to assistant unseal. Simultaneously the smart prestressing system for distortion control is discussed.

关 键 词：开启桥 斜拉桥 开合方式 接触弹簧 智能预应力 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]