Evaluating vibrations on a small-scale model of a timber footbridge

Authors

  • Pedro Gutemberg de Alcântara Segundinho University of São Paulo
  • Antonio Alves Dias University of São Paulo
  • Marcelo Rodrigo Carreira Federal Technological University of Paraná

Keywords:

timber footbridges, pedestrian-induced vibrations, serviceability limit state, small-scale model

Abstract

In Brazil, the study of pedestrian-induced vibration on footbridges has been undertaken since the early 1990s, for concrete and steel footbridges. However, there are no recorded studies of this kind for timber footbridges. Brazilian code ABNT NBR 7190 (1997) gives design requirements only for static loads in the case of timber footbridges, without considering the serviceability limit state from pedestrianinduced vibrations. The aim of this work is to perform a theoretical dynamic, numerical and experimental analysis on simply-supported timber footbridges, by using a small-scale model developed from a 24 m span and 2 m width timber footbridge, with two main timber beams. Span and width were scaled down (1:4) to 6 m e 0.5 m, respectively. Among the conclusions reached herein, it is emphasized that the Euler-Bernoulli beam theory is suitable for calculating the vertical and lateral first natural frequencies in simply-supported timber footbridges; however, special attention should be given to the evaluation of lateral bending stiffness, as it leads to conservative values.

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Author Biographies

Pedro Gutemberg de Alcântara Segundinho, University of São Paulo

Ph.D., Structural Engineering Department, São Carlos School of Engineering, University of São Paulo. São Carlos. Brazil.

Antonio Alves Dias, University of São Paulo

Assistant Professor, Structural Engineering Department, São Carlos School of Engineering, University of São Paulo. São Carlos. Brazil.

Marcelo Rodrigo Carreira, Federal Technological University of Paraná

Ph.D. Student, Coordination of Civil Engineering, Federal Technological University of Paraná, Campus Campo Mourão. Campo Mourão. Brazil.

How to Cite

Gutemberg de Alcântara Segundinho, P., Alves Dias, A., & Rodrigo Carreira, M. (2014). Evaluating vibrations on a small-scale model of a timber footbridge. Maderas-Cienc Tecnol, 13(2), 143–152. Retrieved from https://revistas.ubiobio.cl/index.php/MCT/article/view/1317

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