柳州市白沙大桥西岸引道立交异型箱梁分析

Analysis of Special-shaped Box Girder at West Approach Overpass of Baisha Bridge in Liuzhou City

城市立交桥分流及合流段常采用适应性较好的现浇箱梁,为满足交通需要而顺应路线布置成异型结构。以柳州市白沙大桥西岸引道立交异型箱梁为研究背景,论述了采用空间梁格法进行异型箱梁空间受力的计算过程。结果表明梁格法作为一种简便、有效的实用型计算方法,对桥梁结构设计具有指导性的意义。

The good adaptability of cast-in-situ box girder is often used in the separated and combined sections of urban overpasses in order to meet the traffic demand and follow the line arrangement into special-shaped structure.Based on the research background of the special-shaped box girder at the west approach overpass of Baisha Bridge in Liuzhou City,this paper discusses the calculation process of the spatial stress of the special-shaped box girder by the spatial grillage method.The results show that the grillage method as a simple and effective practical calculation method is of guiding significance to the design of bridge structure.