摘要
外倾式箱型拱肋的定位,采用控制点的绝对误差为准则,往往会隐藏定位节段的偏转误差,影响安装节段与整体的控制精度。以总跨径231 m的外倾式非对称吊杆拱桥为研究对象,建立有限元分析模型,分析非对称外倾式桥梁钢拱肋、钢箱梁的安装控制过程,提出采用轴线和偏角双控的定位方法,可靠地控制外倾式拱肋、非对称受力的箱梁节段的安装与施工精度。通过该方法在建工程外倾式拱肋节段的空间定位过程中的应用,验证了方法的实用性,可靠地减小拱肋、箱梁在安装过程中的施工误差,为外倾式拱桥等类似工程的拼装施工提供借鉴。
For locating the normal arch bridges, absolute errors of key points are usually taken as a criterion.However, this criterion will conceal the inclination angle error and affect the accuracy of construction stages andthe final bridge. In order to avoid this problem, a FEM was established to analyze the construction stage and anew method was proposed, which takes axis position and declination control at the same time into consideration.With the advantages of reducing installation errors for rib and steel box girder, this method was tested on one realbridge, which is extroversive and unsymmetrical. The results show that the method is effective in reducingconstruction errors and providing construction reference for the extroversive arch bridges or similar projects.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2017年第11期2384-2389,共6页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(51478193)
中央高校基本科研业务费专项资金资助项目(2015ZM114)
中国博士后科学基金资助项目(2016M592490)
关键词
外倾式拱肋
定位方法
偏转误差
施工控制
extroversive arch rib
orientation method
inclination angle error
construction control
