钢拱架裸拱线形及预抬高值迭代算法研究  

Research on Iterative Algorithm for Naked Arch Layout and Value of Pre-raise of Steel Arches

作　　者：张立永[1] 程俊[1] 杨晶晶[1] 余晓萌 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074

出　　处：《公路交通技术》2014年第3期54-58,共5页Technology of Highway and Transport

摘　　要：大跨径拱桥主拱圈施工特别是缆索吊装钢拱架现浇主拱圈施工是一个复杂的过程。为保证施工安全,控制施工精度,需要精确确定钢拱架裸拱线形及其吊装过程扣索的控制索力。以某主跨108 m的上承式钢筋混凝土拱桥为例,对缆索吊装钢拱架现浇主拱圈的施工过程进行模拟,给出钢拱架裸拱线形及预抬高值的迭代算法及合理的扣索索力,对同类型桥梁仿真计算具有借鉴意义。Construction of main arch rings of large-span arch bridges, especially construction of cast-in- situ main arch rings of cable-hoisting steel arches is a complicated process. In order to guarantee safety of construction and control precision of construction, the naked arch layout of steel arches and control cable force of pintle cables during hoisting should be accurately determined. With a deck type reinforced concrete arch bridge at 108 m main span as an example, this paper simulates the constructionprocess of cast-in-situ main arch rings of cable-hoisting steel arches and presents iterative algorithm for naked arch layout and value of pre- raise of steel arches and reasonable force of pintle cables with a reference significance for simulation calculation of bridges of the same type.

关 键 词：钢拱架 缆索吊装-斜拉扣挂法 裸拱线形 预抬高值 迭代算法 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]