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文中首先将桥梁横向振动实测記录分成“机車在桥上”、“貨物列車通过”以及“列車离桥”三个区段。由于各区段中引起振动的原因不同,基本規律也不同。然后进一步用概率統計方法按1%机率來統計分析横向振动的振幅值,这样得出的振幅值規律性比較好,且有安全度概念。此外,文中还根据实测記录提出桁梁桥空間振动振型以及确定横向摇摆力的方法。
First of all, the paper records the lateral vibration measurement of the bridge into three sections: “locomotive on the bridge”, “freight train passing” and “train leaving the bridge”. Due to the various causes of vibration in different sections, the basic rules are different. Then further use of probability and statistics method to 1% probability of statistical analysis of the amplitude of lateral vibration, so the amplitude of the law is better, and the concept of safety. In addition, the paper also based on the measured records proposed truss girder bridge vibration mode and the determination of lateral rocking force method.