鹦鹉洲接线工程立交匝道桥计算方法和设计要点

Calculation Methods and Design Features of Interchange Ramp Bridge in Parrot Continent Connection Projects

立交匝道桥由于其结构受力与直线桥存在差异,特别是由于弯扭耦合作用,其转矩通常比直线箱梁桥大。介绍了鹦鹉洲接线工程立交匝道桥的计算方法和特殊构造细节,如箱梁横隔板、抗扭钢筋、伸缩缝及支座选用布置等设计要点。

The structure stress of interchange ramp bridge is different from that of straight bridge. The torque of interchange ramp bridge is usually higher than the straight-line box girder bridge, espe- cially when the bridge is under the action of the coupling effect of bending and torsion. This paper mainly introduced computation method and the special structure detail of interchange ramp bridge in Parrot continent connection projects, including diaphragms of box girder, torsion resistance steel, ex- pansion joint and selection and arrangement of the supports.