Measurements and Prediction of Pedestrian Walking Loads on an Aluminium Catwalk

Fernández Martínez, Javier and Fraile de Lerma, Alberto and Alarcón Álvarez, Enrique and Hermanns, Lutz Karl Heinz (2012). Measurements and Prediction of Pedestrian Walking Loads on an Aluminium Catwalk. In: "11th International Conference on Computational Structures Technology", 04/09/2012-07/09/2012, Dubrovnik (Croatia). ISBN 1759-3433.

Description

Title: Measurements and Prediction of Pedestrian Walking Loads on an Aluminium Catwalk
Author/s:
  • Fernández Martínez, Javier
  • Fraile de Lerma, Alberto
  • Alarcón Álvarez, Enrique
  • Hermanns, Lutz Karl Heinz
Item Type: Presentation at Congress or Conference (Article)
Event Title: 11th International Conference on Computational Structures Technology
Event Dates: 04/09/2012-07/09/2012
Event Location: Dubrovnik (Croatia)
Title of Book: Proceedings of the Eleventh International Conference on Computational Structures Technology
Date: 2012
ISBN: 1759-3433
Subjects:
Freetext Keywords: Aluminium structure, human induced vibration, structural dynamics, structural damping, finite element method, walking load model, system identification, indirect methods
Faculty: E.T.S.I. Industriales (UPM)
Department: Mecánica Estructural y Construcciones Industriales [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

During the last two decades the topic of human induced vibration has attracted a lot of attention among civil engineering practitioners and academics alike. Usually this type of problem may be encountered in pedestrian footbridges or floors of paperless offices. Slender designs are becoming increasingly popular, and as a consequence, the importance of paying attention to vibration serviceability also increases. This paper resumes the results obtained from measurements taken at different points of an aluminium catwalk which is 6 m in length by 0.6 m in width. Measurements were carried out when subjecting the structure to different actions:1)Static test: a steel cylinder of 35 kg was placed in the middle of the catwalk; 2)Dynamic test: this test consists of exciting the structure with singles impulses; 3)Dynamic test: people walking on the catwalk. Identification of the mechanical properties of the structure is an achievement of the paper. Indirect methods were used to estimate properties including the support stiffness, the beam bending stiffness, the mass of the structure (using Rayleigh method and iterative matrix method), the natural frequency (using the time domain and frequency domain analysis) and the damping ratio (by calculating the logarithmic decrement). Experimental results and numerical predictions for the response of an aluminium catwalk subjected to walking loads have been compared. The damping of this light weight structure depends on the amplitude of vibration which complicates the tuning of a structural model. In the light of the results obtained it seems that the used walking load model is not appropriate as the predicted transient vibration values (TTVs) are much higher than the measured ones.

More information

Item ID: 26408
DC Identifier: http://oa.upm.es/26408/
OAI Identifier: oai:oa.upm.es:26408
Official URL: http://www.civil-comp.com/conf/cst2012.htm
Deposited by: Biblioteca ETSI Industriales
Deposited on: 26 May 2014 08:33
Last Modified: 22 Sep 2014 11:41
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