高速铁路小半径曲线T形刚构桥设计

王建圣

济青高速铁路有限公司，山东 济南  250014

摘要：为减小某高速铁路连接线施工时对与其小角度交叉的运营高速铁路的影响，采用大跨度小半径曲线T形刚构桥转体桥梁施工方案，设计曲线T形刚构桥主梁和主墩的结构形式，采用有限元软件MIDAS Civil和BSAS计算分析曲线T形刚构桥在施工阶段、运营阶段及地震等工况下的结构应力、挠度和支反力等，采用MIDAS Civil计算分析成桥阶段小半径曲线T形刚构桥的动力特性。结果表明：曲线T形刚构桥主梁及主墩结构的应力、挠度、自振频率等控制性指标均符合设计要求。

关键词：高速铁路；小半径曲线；T形刚构桥；结构设计；动力特性

Design of T-shaped rigid frame bridge with small radius curve for high speed railway

WANG Jiansheng

JiQing High Speed Railway Co., Ltd., Jinan 250014, China

Abstract: In order to reduce the impact of the construction of a high speed railway connecting line on the operating high speed railway crossing with it at a small angle, the construction scheme of a large-span T-shaped rigid frame bridge with small radius curve is adopted. Structural form of main girder and main pier of curved T-shaped rigid frame bridge is designed. The structural stress, deflection and support reaction of curved T-shaped rigid frame bridge is calculated and analyzed under construction stage, operation stage and earthquake conditions with the finite element software MIDAS civil and BSAS. The dynamic characteristics of T-shaped rigid frame bridge with small radius curve at completion stage are analyzed with MIDAS Civil. The results show that the stress, deflection, natural vibration frequency and other control indexes of the main girder and main pier structure of the curved T-shaped rigid frame bridge meet the design requirements.

Keywords: high speed railway; small radius curve; T-shaped rigid bridge; structural design; dynamic characteristics