大跨度高速铁路桥梁测试与分析中的技术问题

概述大跨度高速铁路桥梁评定标准,探讨测试中需注意的关键问题.桥梁结构在列车荷载作用下能否安全工作和桥上列车是否会脱轨是大跨度高速铁路通车鉴定的重要内容,需进行理论分析并逐步积累我国实测试验资料,完善适合于我国高速铁路的评估标准.根据大跨度高速铁路桥梁的信号特点对采样频率与滤波频率进行设置,对脱轨系数分析进行讨论.

Technical Issues in Testing and Analysis of Long Span High-Speed Railway Bridges

The assessment criteria for long span high-speed railway bridges are described in a summarized account and several critical issues in need of attention in the testing of the bridges are studied. Whether the structures of the bridges can safely work under the action of train load and whether the trains on the bridges will derail are the important contents for the assessment of o-pening of the bridges to traffic. In regard of these contents, the theoretic analysis and the gradual accumulation of field testing data of the bridges in our country are necessitated and the assessment criteria suitable for the bridges should be perfected. In the light of the characteristics of the signals collected from the bridges, the sampling frequency and filtering frequency are set and the a-nalysis of the derailing coefficients are discussed.