交通科技
交通科技
교통과기
TRANSPORTATION SCIENCE & TECHNOLOGY
2015年
3期
8-10
,共3页
钢箱梁%独塔斜拉桥%转体施工%不对称孔跨
鋼箱樑%獨塔斜拉橋%轉體施工%不對稱孔跨
강상량%독탑사랍교%전체시공%불대칭공과
steel box girder%single-pylon cable-stayed bridge%swivel construction%asymmetric span arrangement
采用转体施工的大跨度不对称独塔斜拉桥，具有转体吨位大、转体伸臂长、转体梁重不平衡、转盘以上结构较高等特点，转体施工是其控制性风险因素。文中依托龙岩大桥，针对不对称转体施工独塔斜拉桥，构思了适用于该类桥式的合理转体平衡状态和优化思路；基于非线性空间有限元手段，采用非线性影响矩阵技术，实现了龙岩大桥转体平衡状态的优化，为该类桥式大吨位转体施工的顺利实施提供了技术支撑。
採用轉體施工的大跨度不對稱獨塔斜拉橋，具有轉體噸位大、轉體伸臂長、轉體樑重不平衡、轉盤以上結構較高等特點，轉體施工是其控製性風險因素。文中依託龍巖大橋，針對不對稱轉體施工獨塔斜拉橋，構思瞭適用于該類橋式的閤理轉體平衡狀態和優化思路；基于非線性空間有限元手段，採用非線性影響矩陣技術，實現瞭龍巖大橋轉體平衡狀態的優化，為該類橋式大噸位轉體施工的順利實施提供瞭技術支撐。
채용전체시공적대과도불대칭독탑사랍교，구유전체둔위대、전체신비장、전체량중불평형、전반이상결구교고등특점，전체시공시기공제성풍험인소。문중의탁룡암대교，침대불대칭전체시공독탑사랍교，구사료괄용우해류교식적합리전체평형상태화우화사로；기우비선성공간유한원수단，채용비선성영향구진기술，실현료룡암대교전체평형상태적우화，위해류교식대둔위전체시공적순리실시제공료기술지탱。
With the characteristics of great swiveling weight,long swiveled cantilever,unbalanced swiveling girder weight and great structure height above the pile cap,the greatest risk factor is the whole process of swivel construction for the long-span single-pylon cable-stayed bridge erected by swivel construction technology.In this paper,based on the background of Longyan Bridge,an ideal swivel balanced state which is fit for asymmetric steel box girder single-pylon cable-stayed bridges is conceived,and also an optimization method is presented.The proposed swivel balanced state is real-ized by nonlinear three-dimensional finite element method and nonlinear influence matrix technique which ensures the smooth operation of large-tonnage swivel construction.
