An Automatic Modal Identification Procedure for the Permanent Dynamic Monitoring of the Sanctuary of Vicoforte

ABSTRACT The interest in automatic modal parameter extraction techniques has increased significantly in recent years because of the rising demand for Continuous Structural Health Monitoring (CSHM) of civil structures and infrastructures. The wider use of CSHM is related to its capability for early damage detection and therefore to its usefulness for planning maintenance and strengthening interventions. This article presents the main steps followed in creating a robust routine to run on an online basis the first-ever Continuous Vibration-Based Structural Health Monitoring (CVB-SHM) of a large masonry oval dome, i.e., the dome of the Regina Montis Regalis Basilica, also known as Sanctuary of Vicoforte. The procedure uses an output-only stochastic subspace identification method complemented by an automatic analysis applied to identification results, which are typically provided in terms of stabilization diagrams. In this study, the fully automatic procedure also includes a hierarchical clustering algorithm to separate authentic from spurious modes.

[1]  Rosario Ceravolo,et al.  Soil-structure modeling and updating of the "Regina Montis Regalis" basilica at Vicoforte, Italy , 2014 .

[2]  Roberto Roccati,et al.  Non-destructive testing of the Sanctuary of Vicoforte , 2004 .

[3]  Joydeep Ghosh,et al.  Data Clustering Algorithms And Applications , 2013 .

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

[5]  A. De Stefano,et al.  Assessing the Health State of Ancient Structures: The Role of Vibrational Tests , 2007 .

[6]  Bart De Moor,et al.  Subspace Identification for Linear Systems: Theory ― Implementation ― Applications , 2011 .

[7]  Rosario Ceravolo,et al.  Monitoring of masonry historical constructions: 10 years of static monitoring of the world's largest oval dome , 2017 .

[8]  Filipe Magalhães,et al.  Explaining operational modal analysis with data from an arch bridge , 2011 .

[9]  R. Ceravolo,et al.  Monitoring of historical buildings: Project of a dynamic monitoring system for the world's largest elliptical dome , 2015, 2015 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems (EESMS) Proceedings.

[10]  Rosario Ceravolo,et al.  Time Domain Identification of Structures: Comparative Analysis of Output-Only Methods , 2013 .

[11]  Claudio Modena,et al.  Uncertainty quantification in structural health monitoring: Applications on cultural heritage buildings , 2016 .

[12]  B. Peeters,et al.  Stochastic System Identification for Operational Modal Analysis: A Review , 2001 .

[13]  Hoon Sohn,et al.  Effects of environmental and operational variability on structural health monitoring , 2007, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[14]  Carlo Rainieri,et al.  Near real-time tracking of dynamic properties for standalone structural health monitoring systems , 2011 .

[15]  Gabriele Comanducci,et al.  Earthquake-Induced Damage Detection in a Monumental Masonry Bell-Tower Using Long-Term Dynamic Monitoring Data , 2018 .

[16]  Guido De Roeck,et al.  Fully automated (operational) modal analysis , 2012 .

[17]  François M. Hemez,et al.  Guaranteeing robustness of structural condition monitoring to environmental variability , 2017 .

[18]  E. Parloo,et al.  AUTONOMOUS STRUCTURAL HEALTH MONITORING—PART I: MODAL PARAMETER ESTIMATION AND TRACKING , 2002 .

[19]  Sergio Lagomarsino,et al.  Modeling Strategies for the World's Largest Elliptical Dome at Vicoforte , 2008 .

[20]  H. Van der Auweraer,et al.  Discriminating physical poles from mathematical poles in high order systems: use and automation of the stabilization diagram , 2004, Proceedings of the 21st IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.04CH37510).

[21]  Rosario Ceravolo,et al.  Amplitude dependence of equivalent modal parameters in monitored buildings during earthquake swarms , 2017 .

[22]  Gabriele Comanducci,et al.  Environmental effects on natural frequencies of the San Pietro bell tower in Perugia, Italy, and their removal for structural performance assessment , 2017 .

[23]  Rosario Ceravolo,et al.  Vibration-Based Monitoring and Diagnosis of Cultural Heritage: A Methodological Discussion in Three Examples , 2016 .

[24]  Daniele Spina,et al.  Osservatorio sismico delle strutture: the Italian structural seismic monitoring network , 2017, Bulletin of Earthquake Engineering.

[25]  Mirko Corigliano,et al.  Ground shaking scenarios at the town of Vicoforte, Italy , 2011 .

[26]  Alessandro Cabboi,et al.  Automated Modal and Structural Identification of a Stone-Masonry Bell-Tower for SHM , 2014 .

[27]  D. J. Ewins,et al.  Modal Testing: Theory and Practice , 1984 .

[28]  Guido De Roeck,et al.  Reference-based combined deterministic–stochastic subspace identification for experimental and operational modal analysis , 2006 .

[29]  P. Andersen,et al.  Automated Frequency Domain Decomposition for Operational Modal Analysis , 2007 .

[30]  G. Jelicic,et al.  Automatic Operational Modal Analysis for Aeroelastic Applications , 2015 .

[31]  Xianggui Qu,et al.  Multivariate Data Analysis , 2007, Technometrics.

[32]  Paulo B. Lourenço,et al.  Monitoring historical masonry structures with operational modal analysis: Two case studies , 2007 .

[33]  Rosario Ceravolo,et al.  Dynamic Characterization of Complex Masonry Structures: The Sanctuary of Vicoforte , 2011 .

[34]  O. S. Salawu.  Detection of structural damage through changes in frequency: a review , 1997 .

[35]  Claudio Modena,et al.  Structural health monitoring of the Roman Arena of Verona, Italy , 2013 .

[36]  Alessandro Cabboi,et al.  Automated modal identification and tracking: Application to an iron arch bridge , 2017 .

[37]  B A Cunha,et al.  The atypical pneumonias: clinical diagnosis and importance , 2006, Clinical Microbiology and Infection.

[38]  Á. Cunha,et al.  Experimental Modal Analysis of Civil Engineering Structures , 2006 .

[39]  Patrick Guillaume,et al.  Structural health monitoring of offshore wind turbines using automated operational modal analysis , 2014 .

[40]  Filipe Magalhães,et al.  Online automatic identification of the modal parameters of a long span arch bridge , 2009 .

[41]  Adrian C. Orifici,et al.  Fully Automated Operational Modal Analysis using multi-stage clustering , 2017 .

[42]  Paul Sas,et al.  Modal Analysis Theory and Testing , 2005 .

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

[44]  Carmelo Gentile,et al.  Post-earthquake continuous dynamic monitoring of the Gabbia Tower in Mantua, Italy , 2015 .