Experimental Modal Analysis of Civil Engineering Structures

Decades ago, a major concern of structural engineers was the development and application of new and powerful numerical methods for the static and dynamic analysis of large civil engineering structures. The rapid development of finite-element techniques accompanied by tremendous technological progress in the field of personal computers allowed structural designers to use software packages for accurate simulation of structural behavior. However, the design and construction of more and more complex and ambitious civil structures, like dams, large cablestayed or suspension bridges, or other special structures have led structural engineers to develop new experimental tools to enable the accurate identification of the most relevant static and dynamic properties. These tools would provide reliable data to support calibrating, updating, and validating of structural analysis numerical models used at the design stage. The continuous ageing and subsequent structural deterioration of a large number of existing structures have encouraged the development of efficient vibration-based damage detection techniques supported by structural health monitoring systems. The natural tendency of civil engineering researchers was to utilize well established input-output modal identification techniques to accurately identify the main dynamic properties of civil structures. However, it is difficult to excite large civil structures in a controlled manner. Fortunately, remarkable technological progress in transducers and analog-to-digital converters has supported modal analysis of large structures exclusively based on measuring the structural response to ambient excitations and applying suitable stochastic modal identification methods. The main purpose of this article is to briefly present our perspective concerning the evolution of experimental modal analysis in the civil engineering field, from input-output to output-only modal identification techniques. This discussion is strongly influenced by our experience as researchers.

[1]  I. R. Stubbs,et al.  Ambient Vibration of Two Suspension Bridges , 1971 .

[2]  Mihailo D. Trifunac,et al.  Comparisons between ambient and forced vibration experiments , 1972 .

[3]  E. C. Mikulcik,et al.  A method for the direct identification of vibration parameters from the free response , 1977 .

[4]  A. M. Abdel-Ghaffar.  Vibration studies and tests of a suspension bridge , 1978 .

[5]  David L. Brown,et al.  Parameter Estimation Techniques for Modal Analysis , 1979 .

[6]  Richard Russell,et al.  A Multi-Input Modal Estimation Algorithm for Mini-Computers , 1982 .

[7]  Poul Henning Kirkegaard,et al.  Identification of Dynamical Properties from Correlation Function Estimates , 1992 .

[8]  Andreas Johann Felber,et al.  Development of a hybrid bridge evaluation system , 1994 .

[9]  J. C. Asmussen,et al.  Modal Analysis Based on the Random Decrement Technique: application to civil engineering structures , 1997 .

[10]  Nuno M. M. Maia,et al.  Theoretical and Experimental Modal Analysis , 1997 .

[11]  Palle Andersen,et al.  Modal Identification from Ambient Responses using Frequency Domain Decomposition , 2000 .

[12]  Elsa Caetano,et al.  Ambient vibration data analysis of heritage court tower. Contribution of University of Porto to IMAC benchmark , 2000 .

[13]  E. Caetano,et al.  DYNAMIC TESTS ON A LARGE CABLE-STAYED BRIDGE AN EFFICIENT APPROACH By , 2000 .

[14]  Bart Peeters,et al.  System identification and damage detection in civil engineering , 2000 .

[15]  Elsa Caetano,et al.  Investigation of dynamic cable-deck interaction in a physical model of a cable-stayed bridge. Part II : seismic response , 2000 .

[16]  Elsa Caetano,et al.  Investigation of dynamic cable–deck interaction in a physical model of a cable‐stayed bridge. Part I: modal analysis , 2000 .

[17]  Álvaro Cunha,et al.  Ambient vibration test of a steel trussed arch bridge , 2000 .

[18]  Carlos E. Ventura,et al.  Damping estimation by frequency domain decomposition , 2001 .

[19]  Guido De Roeck,et al.  Dynamic study of the Vasco de Gama bridge , 2002 .

[20]  Alfredo Campos Costa,et al.  Dynamic tests of the structure for extension of the Madeira island airport , 2002 .

[21]  Rune Brincker,et al.  A Way of Getting Scaled Mode Shapes in Output Only Modal Testing , 2003 .

[22]  Anne Teughels,et al.  Inverse modelling of civil engineering structures based on operational modal data , 2003 .

[23]  Rune Brincker,et al.  Improvement of Frequency Domain Output Only Modal Identification from the Application of the Random Decrement Technique , 2004 .

[24]  Palle Andersen,et al.  Identification from the natural response of Vasco da Gama Bridge , 2004 .

[25]  Reto CANTIENI.  Assessing a Dam's Structural Properties Using Forced Vibration Testing , 2004 .

[26]  Herman Van der Auweraer,et al.  Operational PolyMAX for estimating the dynamic properties of a stadium structure during a football game , 2004 .