时速200 km城际铁路双线圆端形空心墩受力性能分析

摘要

With reference to the design of hollow pier for 200 km/h inter-city railway, this paper focuses on the stress analysis of railway bridge hollow pier under the working condition of non-temperature difference and temperature load, and summarizes the stress particularities and reinforcement requirement for the hollow pier. The conclusions are as follows:(1)Under the working condition of non-temperature difference, the stress level of pier shaft is low and only structural steel bar is needed, and the pier shaft is verified as a concrete member. ( 2 ) Under the working condition of temperature difference, part of the pier cross-section stress excesses the allowable stress of concrete, steel bar is arranged according to calculation and the pier shaft is verified as a reinforced concrete member. ( 3 ) Obvious fixed end interference effect exists in solid and hollow juncture, which requires additional local reinforcement.%结合时速200 km城际铁路双线圆端形空心墩设计实例，阐述铁路空心墩在非温差工况和温差荷载工况作用下的受力分析思路，总结出空心墩的受力特点和配筋原则。结论为：非温差工况作用下，墩身应力水平较低，仅需配置构造钢筋，按混凝土构件对墩身进行检算；温差工况作用下，部分墩身截面应力已超出混凝土的容许应力，需按计算配置钢筋，按钢筋混凝土构件对墩身进行检算；实体和空心交界处存在明显固端干扰效应，需局部加强钢筋布置。