Identification of Pedestrian Bridge Dynamic Response trough Field Measurements and Numerical Modelling: Case Studies

Open access


In this work, we develop a technique for performing system identification in typical pedestrian bridges, using routine equipment at a minimal configuration, and for cases where actual structural data are either sparse or absent. To this end, two pedestrian bridges were examined, modelled and finally instrumented so as to record their dynamic response under operational conditions. More specifically, the bridges were numerically modelled using the finite element method (FEM) according to what was deduced to be their current operating status, while rational assumptions were made with respect to uncertain structural properties. Next, results from field testing using a portable accelerometer unit were processed to produce response spectra that were used as input to a structural identification software program, which in turn yielded the excited natural frequencies and mode shapes of the bridges. The low level of discrepancy is given between analytical and experimental results, the latter are used for a final calibration of the numerical models.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • [1] Dallardal P. T. Fitzpatrick A. Flint A. Low R. Ridsdill-Smith M. Willford M. Roche. London Millennium Bridge: Pedestrian-induced Lateral Vibration. ASCE J. Bridge Eng. 6 (2001) No. 6 412-417.

  • [2] Fujino Y. B. M. Pacheco S. I. Nakamura P. Warnitchal. Synchro- nization of Human Walking Observer during Lateral Vibration of a Congested Pedestrian Bridge. Earthquake Eng. Struct. Dyn. 22 (1993) No. 9 741-758.

  • [3] Nakamura S. I. Model for Lateral Excitation of Footbridges by Synchronous Walking. ASCE J. Struct. Eng. 130 (2004) No. 1 32-37.

  • [4] Zivanovic M. A. Pavic. Dynamic Response due to Vertical Load Models of Pedestrians In: Proceedings of the 8th EURODYN International Conference on Structural Dynamics 4-6 July 2011 Belgium Leuven.

  • [5] Cunha A. E. Caetano. Experimental Modal Analysis of Civil Engineering Structures. Sound and Vibration 6 (2006) No. 40 12-20.

  • [6] Cunha A. E. Caetano R. Brincker P. Andersen. Identification from the Natural Response of the Vasco da Gama Bridge In: Proceedings of the 22nd InternationalModal Analysis Conference IMAC USA DearbornMichigan 2004 202-209.

  • [7] De Roeck G. B. Peeters J. Maerck. Dynamic Monitoring of Civil Engineering Structures In: Proceedings of Computational Methods for Shell and Spatial Structures IASS-IACM 2000 Conference Greece Athens 2000 1-24.

  • [8] Brincker R. L. Zhang P. Andersen. Modal Identification from Ambient Responses using Frequency Domain Decomposition In: Proceedings of the 18th International Modal Analysis Conference IMAC Society of Experimental Mechanics USA Texas San Antonio 2000 625-630.

  • [9] Brincker R. L. Zhang. Frequency Domain Decomposition Revisited In: Third International Operational Modal Analysis Conference 2009 Italy Ancona 615-626.

  • [10] Cantieni R. M. Brehm V. Zabel T. Rauert B. Hoffmeister. Ambient Testing and Model updating of a Bridge for High-speed Trains In: Proceedings of the 25th International Modal Analysis Conference IMAC February 4-7 2008 USA Florida Orlando 1005-1013.

  • [11] CEN EC1-2. Actions on Structures. Part 2: Traffic Loads on Road Bridges and Footbridges European Committee for Standardization 2003 Brussels Belgium.

  • [12] Setra. Service d’ Etudes sur les Transports Steel Concrete Composite Bridges: Sustainable Design Guide 2010 France Bagneux SETRA (downloaded elec- tronically).

  • [13] Hivoss. Human Induced Vibrations of Steel Structures Design of Footbridges I: Background II: Guidelines. Report No. RFS2-CT-2007-00033 2007 Germany Aachen Aachen University (downloaded electronically).

  • [14] Sap. (Structural Analysis Program). Integrated Finite Element Analysis and Design of Structures 2000 CSI Inc. USA California Berkeley (downloaded elec- tronically).

  • [15] Crocker M. J. Handbook of Noise and Vibration Control USA Hoboken New Jersey John Wiley 2007.

  • [16] Ntotsios E. C. Karakostas V. Lekidis P. Panetsos I. Nikolaou C. Papadimitriou T. Salonikios. Structural Identification of Egnatia Odos Bridges based on Ambient and Earthquake Induced Vibrations. Bull. Earthquake Eng. 7 (2009) No. 2 485-501.

  • [17] Peeters B. G. De Roeck. Reference-based Stochastic Subspace Identification for Output-only Modal Analysis. Mech. Systems and Signal Processing 13 (1999) No. 6 855-878.

  • [18] Peeters B. G. De Roeck. Stochastic System Identification for Operational Modal Analysis: A review. J. Dyn. Systems ASME 123 (2001) No. 4 659-667.

  • [19] Basseville M. A. Benveniste M. Goursat L. Hermans L. Mevel H. Van Der Auweraer. Output-only Subspace-based Structural Identification: From Theory to Industrial Testing Practice. J. Dyn. Syst. ASME 123 (2001) No. 4 668-676.

  • [20] Verboven P. Frequency Domain System Identification for Modal Analysis PhD Thesis Belgium Brussels Vrije Universiteit 2002.

  • [21] Gauberghe B. Applied Frequency-domain System Identification in the Field of Experimental and Operational Modal Analysis PhD Thesis Belgium Brussels Vrije Universiteit 2004.

  • [22] Peeters B. H. Van Der Auweraer. Recent Developments in Operational Modal Analysis In: Proceedings EURODYN 2005 edited by C. Soize and G. I. Schueller Netherlands Rotterdam Millpress 2005 149-154.

  • [23] Kyowa Sensor Interface PCD-300A. Hardware Instruction Manual KY- OWA Electronic Instruments Co. Ltd. Japan Tokyo 2009.

  • [24] Seismosignal Version 4.0. Earthquake Engineering Software Solutions Seis- moSoft Ltd. Italy Pavia 2010.

  • [25] ARTeMIS Extractor. Structural Vibration Solutions Electronic User’s Man- ual Denmark Aarhus Aarhus University 2006.

Journal information
Impact Factor

CiteScore 2018: 0.88

SCImago Journal Rank (SJR) 2018: 0.192
Source Normalized Impact per Paper (SNIP) 2018: 0.646

Mathematical Citation Quotient (MCQ) 2017: 0.01

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 210 120 1
PDF Downloads 115 81 4