摘要
文章以中南通道为工程背景,在75型钢轨、轨枕间距0.6m、轨下胶垫刚度140k N/mm及道床刚度150k N/mm的条件下,建立列车-过渡段-桥梁动力分析模型,结合理论分析和实测数据确定线桥过渡段有效深度和动刚度,通过列车、轨道结构和桥梁的动力响应考察不同过渡段长度对系统动力性能的影响。结果表明,设置过渡段对轨道和车辆的响应略有改善,但效果不甚明显,且过渡段长度从20m增加到50m,轨道和车辆的动力响应几乎无变化,过渡段的主要作用在于保证过渡段构造的稳定性和控制差异沉降。
Taking South-central Railway as the engineering background,under the condition of 75 kg rail,0. 6 m as sleeper spacing,140 kN / mm as stiffness of pads under rail and 150 kN / mm as stiffness of ballast bed,the train-transition section-bridge dynamic analysis model is built,effective depth and dynamic stiffness of transition section are determined by theoretical analysis and actual data,and the influence of different transition section lengths on system dynamic performance is studied through the dynamic response of train,track structure and bridge. The results show that the length of transition section increased from 20 m to 50 m will slightly improve the dynamic response of train and track,but the effect is not obvious,the main function of transition section is assurance of structure stability and decreasing of differential settlement.
出处
《高速铁路技术》
2016年第5期71-74,79,共5页
High Speed Railway Technology
基金
中国铁路总公司科技研究开发计划项目(2015G004-A)
关键词
重载铁路
线桥过渡段
路基动刚度
行车安全性
heavy haul railway
transition section of track and bridge
dynamic stiffness of subgrade
running safety
