高速铁路槽形连续梁车-轨-桥相互作用动力分析

济青高速铁路(40+70+70+40) m槽形连续梁是国内外跨度最大的高速铁路双线预应力槽形连续梁。为分析其列车通过时的动力性能,建立列车-轨道-槽形连续梁动力相互作用模型,编制铁路列车-轨道-桥梁耦合动力仿真软件RTTB,利用现场实测数据验证仿真软件的工程可用性,对动车组与货车过桥时系统的动力响应进行数值计算和评估。结果表明:CRH2动车组、CRH3动车组、C64货车在设计速度范围内以单列或者双列的形式通过桥梁时,车辆的安全性指标均合格,平稳性指标为优秀,桥梁的各项动力响应指标均满足规范要求,槽形连续梁结构设计合理,满足设计要求。

Dynamic Responses of Continuous Trough Girder of High-speed Railway Based on Train-Track-Bridge Interactions

The(40+70+70+40) m continuous trough girder of Ji-Qing high-speed railway is a double track prestressed concrete continuous trough girder with the longest span at home and abroad. In order to analyze the dynamic responses of the bridge coupled with a passing train, a fundamental model is established for analyzing the train-track-continuous trough girder dynamic interactions. A railway train-track-bridge coupling dynamic simulation software RTTB is developed and its engineering usability is verified by field measured data. The dynamic response of the system when the emu crosses the bridge with the wagon is calculated and evaluated. The results show that vehicle safety indicators are qualified, stability indicators are excellent, and all the dynamic response indicators of the bridge meet the specification requirements when CRH2 emu, CRH3 emu and C64 wagon pass through the bridge in a single or double fleet within the designed speed. The structure design of the continuous trough girder is reasonable and meets the design requirements.