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

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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.

[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, Dearborn,Michigan, 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 of Theoretical and Applied Mechanics

The Journal of Institute of Mechanics of Bulgarian Academy of Sciences

Journal Information

CiteScore 2017: 1.14

SCImago Journal Rank (SJR) 2017: 0.217
Source Normalized Impact per Paper (SNIP) 2017: 0.583

Mathematical Citation Quotient (MCQ) 2017: 0.01


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