Post-earthquake continuous dynamic monitoring of the Gabbia Tower in Mantua, Italy

Saisi, A.; Gentile, Carmelo; Guidobaldi, Marco

doi:10.1016/j.conbuildmat.2015.02.010

Cited by 145 publications

(105 citation statements)

References 20 publications

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“…The lower modes exhibit a strong positive correlation, being r and R 2 equal to 0.83 and 0.69 for mode 1, and equal to 0.86 and 0.74 for mode 3, respectively; whereas mode 4 is characterized by a frequency-temperature trend similar to mode 3 but less strong, as pointed out by the lower values of r (0.74) and R 2 (0.55). It is noted that the positive correlation between modal frequencies and temperature is often observed in long-term studies of masonry structures [8][9][10][11] and can be explained through the rise in stiffness induced by the thermal expansion of the materials with higher temperatures, lower moisture contents on the walls [7], and the consequent increase in frequency values. The plots relevant to modes 3 and 4 also highlight the considerable change in the frequency-temperature relationships triggered by the seismic event of February 2007.…”

Section: Results Of the Long-term Dynamic Monitoringmentioning

confidence: 99%

“…Like all parametric system identification techniques [9,11,23], a user-defined integer is required, i.e. the maximum model order.…”

Section: Automated Modal Parameter Estimationmentioning

confidence: 99%

“…Special regard is given to the environmental variability of the system, as subtle changes caused by damage in masonry structures may be often masked by changes due to varying ambient conditions [5][6]. Indeed, in the last decades, the analysis of the environmental effects on the system's behaviour has been regularly introduced in the common practice of structural health monitoring [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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A multidisciplinary approach to assess the health state of heritage structures: The case study of the Church of Monastery of Jerónimos in Lisbon

Masciotta

Roque

Ramos

et al. 2016

Construction and Building Materials

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Section: Results Of the Long-term Dynamic Monitoringmentioning

confidence: 99%

“…Like all parametric system identification techniques [9,11,23], a user-defined integer is required, i.e. the maximum model order.…”

Section: Automated Modal Parameter Estimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A multidisciplinary approach to assess the health state of heritage structures: The case study of the Church of Monastery of Jerónimos in Lisbon

Masciotta

Roque

Ramos

et al. 2016

Construction and Building Materials

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“…Within this framework, the dynamic monitoring of architectural heritage can be still considered as a challenge, due to the complexity of the structures and of their behaviour [1,2,3,4]. In particular, vibration-based SHM techniques applied to historical constructions are giving interesting results in terms of damage detection especially after earthquakes of even small intensity [5,6,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Monitoring and Nonlinear Analysis of the Dome of the Basilica of S.MARIA Degli Angeli in Assisi

Cavalagli¹,

Botticelli²,

Gioffré³

et al. 2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Abstract. During the last years, the application of Structural Health Monitoring (SHM) systems to heritage constructions has received a great interest due to the low invasiveness and low-cost of the necessary equipment. When applied to monumental structures and, more in general, to cultural heritage ones, such SHM systems represent an effective solution for preventive conservation against both material degradation and damages derived by natural hazards, such as earthquakes. Among the various technical solutions currently available for SHM, vibration-based systems deserve a special attention, but their application in the context of historical constructions is still quite rare and challenging, with very few documented applications, mostly limiting to masonry towers and bell-towers for their slenderness properties.In this work, the first months of continuous vibration monitoring of the dome of the Basilica of Santa Maria degli Angeli in Assisi are presented. At first, a dynamic identification has been carried out using five high-sensitivity accelerometers, three of them installed at the base of the drum and two at the base of the dome. Then, a fully automated identification technique has been used to extract time series of natural frequencies during the monitoring period. Moreover, some statistical tools have been applied in order to select the best configuration, in terms of number and position of sensors, necessary to obtain a continuous frequency tracking of the first natural modes in view of the use of this information for rapid post-earthquake structural assessment.Moreover, a preliminary investigation about the seismic assessment has been carried by means of a Finite Element (FE) nonlinear dynamic analysis. The damage map obtained by the numerical simulation has been compared with the actual crack scenario present on the structure, giving further information about the structural dynamic response.

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“…Several applications of vibration-based techniques to masonry towers can be found in literature [9,10,11,12,13,14], due to the slenderness and quite simple requirements in the interpretation of the structural behaviour. This paper is focused on the analysis of two historical masonry towers, located in Perugia, in the centre of Italy, and is essentially divided in two parts: the San Pietro bell-tower and the civic Sciri tower, both masonry towers.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Testing and Monitoring of Historic Towers for Seismic Damage Detection

Kita¹,

Cavalagli²,

Comanducci³

et al. 2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Abstract. Structural health monitoring (SHM) systems represent an acknowledged low-invasiveness and low-cost solution enabling real time condition assessment of civil structures, providing useful information for preventive conservation and maintenance activities. The various documented successful applications of SHM systems to bridges and large infrastructural systems has recently led many researchers to investigate their effectiveness in the case of monumental and historical buildings, often vulnerable to both anthropogenic a natural (e.g. seismic) hazards. The countries in the Mediterranean Basin are especially committed to this kind of research, being, at the same time, rich of built cultural heritage and highly exposed to seismic and other natural hazards. Among the various types of historic buildings, Italian Cities are especially characterized by an extensive presence of bell and civic masonry towers, which also deserve a special attention because of their slenderness, making them suitably monitored via vibration-based systems, and because of their seismic vulnerability.Framing in the afore-depicted scenario, the authors have started in the last years a research activity on vibration-based permanent SHM of slender historic towers, finalized at the implementation of new approaches for the optimal management of the limited available budgets for conservation and restoration activities. In the present paper the results concerning this activity are presented with specific reference to two study cases in the city of Perugia, Italy: the bell tower of the Basilica of San Pietro and the civic tower called "Torre degli Sciri". The two considered monuments present completely different characteristics and complexities from both structural and architectural points of view, making them worth interesting investigating as typological benchmarks. The work discusses both ambient vibration testing and permanent mon-itoring applications, including considerations regarding the adopted sensing hardware. The feasibility of a rapid post-earthquake damage detection via SHM is finally explored with reference to the study case of the San Pietro bell tower, with particular attention to the recent seismic events.

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Post-earthquake continuous dynamic monitoring of the Gabbia Tower in Mantua, Italy

Cited by 145 publications

References 20 publications

A multidisciplinary approach to assess the health state of heritage structures: The case study of the Church of Monastery of Jerónimos in Lisbon

A multidisciplinary approach to assess the health state of heritage structures: The case study of the Church of Monastery of Jerónimos in Lisbon

Dynamic Monitoring and Nonlinear Analysis of the Dome of the Basilica of S.MARIA Degli Angeli in Assisi

Dynamic Testing and Monitoring of Historic Towers for Seismic Damage Detection

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