京沪高铁天津西站曲线变宽异型钢箱梁设计实践

在恒载、温度荷载和活载等因素作用下连续曲线钢箱梁会出现支座脱空、梁体侧移和翻转等问题。同时相对直梁桥,弯桥扭转效应明显,应引起重视。该文通过京沪高铁天津西站异型连续曲线钢箱梁的设计实践,探讨该类桥梁设计中应注意的若干问题,使连续曲线钢箱梁设计安全、合理、经济。

Design of Curve Widening Special-shaped Steel Box Girder for Tianjin West Station of Beijing-Shanghai High-speed Railway

There are the problems of bearing cavity,beam displacement and turning of the continuous curve steel box girder under the factors of dead load,temperature load and living load.And the torsional effect of the curved bridge is obvious relatively to the straight beam bridge.The article discusses several problems fro attention in the design of this bridge by the design cases of the special-shaped continuous curve steel box girder for Tianjin West Station of Beijing-Shanghai High-speed Railway to make the design of continuous curve steel box girder safe,reasonable and economical.