From continuous vibration monitoring to FEM-based damage assessment: Application on a stone-masonry tower

Abstract The paper presents a damage assessment strategy suitable to historic masonry towers. The methodology is exemplified using the data collected in the continuous dynamic monitoring of the San Vittore bell-tower (Arcisate, Northern Italy). The proposed damage assessment procedure aims not only at detecting the occurrence of structural anomalies, but also at localising the damage in the investigated structure. After a brief description of the tower and past diagnostic survey (including ambient vibration tests and Finite Element modelling), the results of the continuous dynamic monitoring are highlighted and the effect of temperature on automatically identified resonant frequencies is discussed. Subsequently, regression models based on Principal Component Analysis are applied in order to filter out the fluctuations caused by the environmental effects on the identified resonant frequencies. The damage detection and damage localisation issues are then addressed by using novelty analysis tools. The effectiveness of the proposed strategy is demonstrated through the detection and localisation of realistic damage scenarios simulated with the baseline Finite Element model. Specifically, the damage localisation has been tackled by using the “cleaned” modal properties within a continuous Finite Element model updating scheme.

[1]  G. Roeck,et al.  Structural damage identification of the highway bridge Z24 by FE model updating , 2004 .

[2]  Reto Cantieni.  One-Year Monitoring of a Historic Bell Tower , 2014 .

[3]  Babak Moaveni,et al.  Environmental effects on the identified natural frequencies of the Dowling Hall Footbridge , 2011 .

[4]  Carmelo Gentile,et al.  Ambient vibration testing of historic masonry towers for structural identification and damage assessment , 2007 .

[5]  Subhash Sharma.  Applied multivariate techniques , 1995 .

[6]  Alessandro Cabboi,et al.  Structural Identification of a Masonry Tower Based on Operational Modal Analysis , 2015 .

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

[8]  Rune Brincker,et al.  Vibration Based Inspection of Civil Engineering Structures , 1993 .

[9]  Douglas C. Montgomery,et al.  Introduction to Statistical Quality Control , 1986 .

[10]  Michele Dilena,et al.  Reconstruction Method for Damage Detection in Beams Based on Natural Frequency and Antiresonant Frequency Measurements , 2010 .

[11]  Michele Dilena,et al.  Dynamic identification of a reinforced concrete damaged bridge , 2011 .

[12]  Czesław Szymczak,et al.  Identification of the Vistula Mounting tower model using measured modal data , 2012 .

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

[14]  James M. W. Brownjohn,et al.  Long-term monitoring and data analysis of the Tamar Bridge , 2013 .

[15]  Charles R. Farrar,et al.  Novelty detection in a changing environment: Regression and interpolation approaches , 2002 .

[16]  Gaëtan Kerschen,et al.  Structural damage diagnosis under varying environmental conditions—Part I: A linear analysis , 2005 .

[17]  Salvador Ivorra,et al.  Dynamic investigations on a masonry bell tower , 2006 .

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

[19]  Nicola Ivan Giannoccaro,et al.  Ambient vibration testing, dynamic identification and model updating of a historic tower , 2012 .

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

[21]  Babak Moaveni,et al.  Effects of changing ambient temperature on finite element model updating of the Dowling Hall Footbridge , 2012 .

[22]  Gabriele Comanducci,et al.  Vibration-based structural health monitoring of a historic bell-tower using output-only measurements and multivariate statistical analysis , 2016 .

[23]  Luigia Binda,et al.  On Site Investigation and Crack Monitoring of an Ancient Bell-Tower , 2012 .

[24]  Angelo D'Ambrisi,et al.  Seismic assessment of a historical masonry tower with nonlinear static and dynamic analyses tuned on ambient vibration tests , 2012 .

[25]  Guido De Roeck,et al.  One-year monitoring of the Z24-Bridge : environmental effects versus damage events , 2001 .

[26]  G. De Roeck,et al.  Vibration based Structural Health Monitoring using output-only measurements under changing environment , 2008 .

[27]  Filipe Magalhães,et al.  Vibration based structural health monitoring of an arch bridge: From automated OMA to damage detection , 2012 .

[28]  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 .

[29]  Bruce M. Douglas,et al.  DYNAMIC TESTS AND SYSTEM IDENTIFICATION OF BRIDGES , 1982 .

[30]  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.

[31]  C. Fritzen,et al.  DAMAGE DETECTION BASED ON MODEL UPDATING METHODS , 1998 .

[32]  Carlos Sousa Oliveira,et al.  Minaret behavior under earthquake loading: The case of historical Istanbul , 2012 .