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Vandal Loads and Induced Vibrations on a Footbridge
Authors:Elsa Caetano  álvaro Cunha  Carlos Moutinho
Affiliation:1Univ. of Porto, Faculty of Engineering, Dept. Civil Engineering, R. Dr. Roberto Frias, 4200-465 Porto, Portugal. (corresponding author). E-mail: ecaetano@fe.up.pt
2Univ. of Porto, Faculty of Engineering, Dept. Civil Engineering, R. Dr. Roberto Frias, 4200-465 Porto, Portugal.
Abstract:
The paper describes a study to characterize intentional human dynamic loads (vandal loads) and their induced effects on a footbridge. A numerical model to characterize the dynamic behavior of the footbridge has been developed, is experimentally validated, and is used to numerically simulate the response induced by groups of pedestrians synchronized at critical bridge frequencies. The vandal load associated with a single pedestrian is characterized and compared with definitions in the literature. The response is then calculated considering the measured load and compared with the measured response to the excitation induced by a single pedestrian or a group with varying dimensions. The definition of a general load model for vandal excitation, including a tentative definition for synchronization is discussed.
Keywords:Bridges, pedestrian  Vibration  Stress  Dynamic loads  Human factors  
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