摘要
Abstract
As a three-span cable suspension bridge with steel box girder,Lingdingyang Bridge is located at Shenzhen-Zhongshan Link,characterized with the main span of 1 666 m,the main pier cap of 36 m in diameter,8m in height,double-walled steel hanging box of 36.2 m in inner diameter,16 m in height,1 783 t in weight,which serves as temporary cofferdam and permanent anti-collision box.In addition,the construction encounters complex stress and frequent change of the whole system.A finite element model is built to analyze the variation in the stress on different stages of the whole construction process,including hoisting&floating,overall lowering,bottom sealing&pouring,and pier cap pouring.The FE calculation results are close to the field monitoring data.Meanwhile,MSC.Dytran software is used to simulate a 100 000 t ship colliding with the front and side of steel hanging box,which shows that the maximum impact force is reduced by 5.6%and 7.4%respectively.The researches of steel hanging box show reasonable structural design,overall calculation method and feasible construction method.关键词
悬索桥/钢吊箱/封底混凝土/有限元/现场监控/撞击影响Key words
cable suspension bridge/steel hanging box/bottom sealing concrete/finite element/field monitoring/collision influence分类
交通工程
