摘要
为研究钢箱梁斜拉桥主梁制造参数误差对主梁线形在制造阶段、施工阶段及成桥阶段的影响,以3种不同跨径的斜拉桥为研究对象,基于几何控制法的基本原理,并考虑施工全过程几何非线性影响,根据全过程自适应施工控制方法的具体特点和要求,对主梁钢箱梁在施工过程中的制造夹角误差变化及传递规律进行了研究。结果表明:制造夹角误差对新安装梁段在匹配阶段的线形误差影响较大,该梁段线形误差会随着后续施工阶段的推进而逐渐减小;已成梁段线形误差对后续新梁段匹配阶段的线形误差具有传递性,即随着梁段的增长,新梁段匹配阶段线形误差逐渐增大,但误差的传递能力在衰减;随着主梁刚度的增加,主梁夹角引起的误差传递越明显,误差传递能力越强。
In order to investigate the impact on the girder geometric shape caused by the girder manufacture parameters error in fabrication phase,construction phase and the finished phase for steel box girder of cable-stayed bridge. Taking three different span cable-stayed bridges as research subjects,based on the principle of geometry control method and considered the geometry non-linear effect during construction,the girder fabrication angle error changes and transfer law during construction phase for steel-box girder are carried out according to the specific characteristics and requirements of the geometry control of the whole-procedure adaptive construction control method. The results of the calculation and analysis demonstrate that the impact on alignment error caused by fabrication angle error during matching phase for the new installed beam is great,meanwhile the alignment error will decrease gradually with the development of the follow-up construction stage. The finished beam alignment error has transmission for the alignment error of the follow-up beam during matching phase. Namely,the alignment error of new matching beams increases gradually with the growth of the beam,but the capacity of error transmission decays off. The greater the girder stiffness,the more obvious error transfer caused by the girder angle error and the stronger the error transfer ability.
出处
《四川建筑科学研究》
北大核心
2016年第3期124-129,共6页
Sichuan Building Science
基金
国家自然科学基金(51178394)
中央高校基本科研业务费专项资金(2682013BR015EM)
关键词
斜拉桥
几何控制法
误差变化
制造夹角误差
cable-stayed bridge
geometry control method
error change
fabrication angle error
