This chapter utilizes the four wheels' signals of a scanning vehicle fully to detect the frequencies, damping ratios, and mode shapes of the bridge. To offer a theoretical basis, it derives closed‐form solutions for the responses of a damped monosymmetric beam. The chapter aims to calculate the wheel–bridge contact responses from those of the vehicle to eliminate the vehicle frequencies' masking effect. It establishes a complete theory for simultaneously scanning the vertical and torsional frequencies, damping ratios, and mode shapes of thin‐walled girders, by making full use of the data generated by the four wheels of a moving test vehicle. The chapter presents the VBI element that will be used to verify the accuracy of the analytical solutions and the formula for back‐calculating contact responses. It also presents a parametric study to discuss the effects of bridge damping, vehicle suspension damping, vehicle speed, vehicle eccentricity, and pavement roughness.


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    Title :

    Theory for Simultaneously Scanning Modal Properties of Thin‐Walled Girders


    Contributors:

    Published in:

    Publication date :

    2025-08-12


    Size :

    31 pages




    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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