Pre-diagnostic prompt investigation and static monitoring of a historic bell-tower

Abstract An extensive research program is currently in progress to assess the structural condition of the bell-tower of the Church Santa Maria del Carrobiolo in Monza, Italy and to address the preservation of the historic building. The research program was consequent to the direct survey of the tower, carried out within a wide cataloguing activity of the main religious buildings in Monza and highlighting a weak structural layout of the bell-tower. The paper presents the main results of the investigation program performed to date and including: (a) documentary research, systematic visual inspection on site and experimental evaluation of the fundamental period of the tower, carried out using an industrially engineered microwave interferometer; (b) installation of a static monitoring system aimed at surveying the opening of the main cracks, possibly related to the recent construction of an underground car park in the close neighbourhood of the church; (c) dynamic tests in operational conditions, performed using conventional high-sensitivity accelerometers with the twofold objective of validating a FE model of the tower and implementing the installation of a continuous dynamic monitoring system.

[1]  Guido De Roeck,et al.  REFERENCE-BASED STOCHASTIC SUBSPACE IDENTIFICATION FOR OUTPUT-ONLY MODAL ANALYSIS , 1999 .

[2]  Miguel Cervera,et al.  Structural Analysis of Masonry Historical Constructions. Classical and Advanced Approaches , 2010 .

[3]  Paulo B. Lourenço,et al.  Numerical models for the seismic assessment of an old masonry tower , 2010 .

[4]  Rune Brincker,et al.  Modal identification of output-only systems using frequency domain decomposition , 2001 .

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

[6]  Carlo Atzeni,et al.  High-speed CW step-frequency coherent radar for dynamic monitoring of civil engineering structures , 2004 .

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

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

[9]  Antonella Saisi,et al.  INVESTIGATION PROCEDURES FOR THE DIAGNOSIS OF HISTORIC MASONRIES , 2000 .

[10]  Carmelo Gentile,et al.  Pre-diagnostic prompt investigation of a historic Bell Tower by visual inspection and microwave remote sensing , 2015 .

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

[12]  Carmelo Gentile,et al.  Output-only modal identification of a reinforced concrete bridge from radar-based measurements , 2008 .

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

[14]  Walter Salvatore,et al.  Dynamic Behavior of a Medieval Masonry Bell Tower. II: Measurement and Modeling of the Tower Motion , 2005 .

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

[16]  Antonella Saisi,et al.  Post-earthquake diagnostic investigation of a historic masonry tower , 2015 .

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

[18]  Giuseppe Lacidogna,et al.  Numerical assessment of three medieval masonry towers subjected to different loading conditions , 2006 .

[19]  Edwin Reynders,et al.  System Identification Methods for (Operational) Modal Analysis: Review and Comparison , 2012 .

[20]  Carmelo Gentile,et al.  Operational modal testing of historic structures at different levels of excitation , 2013 .

[21]  Carmelo Gentile,et al.  Radar-based vibration measurement on historic masonry towers , 2012 .