京沪高速铁路预应力简支箱梁结构参数优选

Optimization of the Structural Parameter for Prestressed Simple Support Box Girder of Beijing-Shanghai High-speed Railway

依据秦沈客运专线的设计、施工经验 ,结合京沪高速铁路建设的需要 ,对京沪高速铁路预应力混凝土简支箱梁的部分设计参数进行优化 ,包括箱梁结构的支点位置、腹板厚度和腹板坡度等。依据铁道专业设计院提供的原始资料 ,基于有限元分析 ,获得不同参数下的结构静力性能 ,综合结构力学效应、施工和维护 ,提出相应的设计参数优化建议、推荐方案和支座不平整限位值等。

Based on design and construction experience of Qinhuangdao\|Shenyang Passenger Dedicated Railway, and on demand of Beijing\|Shanghai High Speed Railway, part of design parameters for PC simple support box girder of Beijing\|Shanghai high speed railway were optimized, including position of supporting points, thickness of web plate, and gradient of web plate. Based on original data provided by Railway Professional Design Institute, and on finite element analysis, results were obtained on static structural performance, comprehensive mechanical effect, and construction and maintenance with different parameters. Corresponding suggestions on optimization of design parameters, recommendations, and limit value for bearing support unevenness were put forward.