列车提速下32m PC简支T梁的横向刚度加固方案研究

Study on Lateral Rigidity Reinforcement Schemes for 32 m Simply-supported PC T-beams under Train Speed Raising

对既有单线铁路32m标准预应力混凝土简支T梁在列车提速条件下的几种横向刚度加固方案进行研究。采用车桥系统动力相互作用分析的方法,考虑轨道不平顺和车辆蛇行运动影响,针对铁道专业设计院提出的几种加固方案,计算了不同列车速度下桥梁与车辆的动力响应。分析影响桥梁横向振动的主要因素,指出进行桥梁加固时应注意采取的措施,并对各加固方案进行了分析比较。

Several lateral rigidity reinforcement schemes for 32 m simply-supported PC T-beams on existing single-line railway bridges under train speed raising are studied. The dynamic responses of vehicles and bridges with the various reinforcement schemes are calculated by means of the vehicle-bridge interaction model, in which track irregularities and wheel hunting movement are taken into account. Comparison and evaluation are made among the schemes proposed by the design institute, factors influencing lateral bridge vibration are investigated, and measures are proposed for what are needed in reinforcing bridges.