Various types of human running dynamic loads are numerically studied and compared to assess vibration characteristics of the light\r\nand slender composite footbridges. Running, which is a common human activity, has been categorized with respect to its intensity\r\ninto jogging, normal running, and sprinting. To explore the footbridge�s performance, the vibration responses are investigated\r\nthrough a series of analyses in terms of the peak accelerations and displacements. In the model verification, the acquired first\r\nnatural frequency of structure has shown good agreement with the value reported in the literature. The structural performance\r\nof the slender composite footbridge is then evaluated with regard to the serviceability requirement given by the current design\r\nstandards. It is generally found that the maximum acceleration of the composite footbridge due to the excitation of one person\r\nrunning varies under different running types because of diversities in the velocity and the step frequency. Furthermore, it is shown\r\nthat the investigated structure provides sufficient human comfort against vibrations for all the examined three types of running\r\nloads.
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