Application of Particle Motion Technique to Structural Modal Identification of Heritage Buildings

Caselles, O.; Martínez, Guillermo; Clapés, J.; Roca, Pere; Pérez-Gracia, Maria de la Vega

doi:10.1080/15583058.2013.784824

Cited by 14 publications

(12 citation statements)

References 16 publications

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“…Unfortunately, the reason behind this dramatic change is not known with certainty. The imposing main large nave and the west facade (parts C and D in Figure ) were completed by the year 1601 .…”

Section: About Mallorca Cathedralmentioning

confidence: 99%

Dynamic investigation of a large historical cathedral

Elyamani

Caselles

Roca

et al. 2016

Struct. Control Health Monit.

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SUMMARYThe presented research aimed at studying the dynamic behavior of Mallorca cathedral (Mallorca Island, Spain) under ambient sources of vibration and seismic events. The cathedral is one of the greatest built masonry structures worldwide. It is characterized for its audacious dimensions and slender structural members. Because of it, the study of its dynamic behavior is a clear concern. The cathedral dynamic properties were firstly identified using ambient vibration testing. Afterwards, a dynamic monitoring system was implemented to continuously measure, record, and wirelessly transfer the acceleration records without having to set up an activating threshold. This monitoring type was implemented because of the low seismic intensity of Mallorca Island with a basic ground acceleration of only 0.04 g according to the Spanish seismic standard. The continuous monitoring allowed for capturing some seismic events and some drops in the natural frequencies were noticed because of a breathing crack effect. Using both ambient vibration testing and continuous monitoring system, global modes could be more accurately identified than more local ones. The identification of the global modes was more attainable than in the case of more local ones. The temperature was a more influential environmental parameter than humidity and wind for all of the identified modes except for one more directly depended on wind.

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Section: About Mallorca Cathedralmentioning

confidence: 99%

Dynamic investigation of a large historical cathedral

Elyamani

Caselles

Roca

et al. 2016

Struct. Control Health Monit.

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“…The result is a diaphanous single space ( Figure 1). This characteristic differs from the most part of the European gothic structures in which columns divide the church in three spaces, 5 being the lateral naves half width of the main nave and the same height width of the church.…”

Section: Introductionmentioning

confidence: 71%

“…Also, modes 2.05, 2.35, and 2.75 Hz, in Point 7 (Figures , , and ), are transformed from pure longitudinal to bidirectional components probably due to any asymmetry of the towers. Draws of particle motion for each mode show different comportments. The 2.05‐Hz mode changes from pure longitudinal to 70° clockwise; the 2.70 Hz changes to 45° opposite clockwise, and the 2.13 and 2.75 Hz change to torsion mode.…”

Section: Resultsmentioning

confidence: 99%

“…28 Also, modes 2.05, 2.35, and 2.75 Hz, in Point 7 (Figures 4, 14, and 15), are transformed from pure longitudinal to bidirectional components probably due to any asymmetry of the towers. Draws of particle motion for each mode 5 show different comportments. Soil sensor detects a very soft soil with energies at frequencies between 0.38 and 0.72 Hz, as it is expected in soft soils.…”

Section: Results Of the Seismic Monitoringmentioning

confidence: 99%

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Combining ground penetrating radar and seismic surveys in the assessment of cultural heritage buildings: The study of roofs, columns, and ground of the gothic church Santa Maria del Mar, in Barcelona (Spain)

Pérez-Gracia

Santos-Assunçao

Caselles

et al. 2019

Struct Control Health Monit

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Summary Combined non‐destructive techniques are applied in the study of a historical building in Barcelona. Santa Maria del Mar is a magnificent Mediterranean gothic church built between 1329 and 1383. Two of the most important characteristics of this building are the slender columns and the almost flat rooftop. This structure, used to create a visual impression of a unique space, transmits high loads to the tall columns. Previous to restoration, vaults, roofs, and columns were extensively assessed with non‐destructive tests, in order to improve the knowledge of those structures. This information will be used in further simulations to analyse load distributions at each part of the structure. Ground and floor were also studied. The analysis of the columns was based on ground‐penetrating radar (GPR) surveys and on seismic tomography. Finally, the dynamic behaviour of the structure was determined by seismic monitoring of the main nave and the bell tower. Results obtained at the radar survey highlight the existence of unexpected anomalies in homogeneous materials, supporting the hypothesis of an inner structure between arches and roof composed by hollow elements. Seismic tomography defined the inner geometry of the columns and detected some damage or lower quality stone in various zones. Seismic monitoring established the perfect junction between the bell tower and the main nave. GPR survey on the floor allowed detecting a large number of graves, and some images suggest the existence of large underground walls and some of the foundations of the main façade.

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“…The first two modal shapes at each measurement point are recognized by the particle movement technique [41] using accelerometer array. This technique requires filtering the signals on a narrow (e.g., 0.01 Hz) band-pass and setting the identified resonant frequencies as the center of the band-pass.…”

Section: Modal Identification By Accelerometer Arraymentioning

confidence: 99%

Dynamic Monitoring of a Mid-Rise Building by Real-Aperture Radar Interferometer: Advantages and Limitations

et al. 2020

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In this paper, remote and in situ techniques to estimate the dynamic response of a building to ambient vibration are reported: data acquired through a real-aperture radar (RAR) interferometer and conventional accelerometers are analyzed. A five-story reinforced concrete housing building, which was damaged during the May 11th 2011 Lorca (Spain) earthquake, is used as a case study. The building was monitored using both types of instruments. The dynamic properties of the building are estimated first taking acceleration measurements using a set of 10 high-precision accelerometers installed on the roof of the building. Further, the displacement–time histories, recorded with the RAR device pointing to a corner of the building, are analyzed. Then, the ability and shortcomings of RAR measurements to deal with the fundamental frequencies of vibration of the structure are investigated. The advantages and limitations of from-inside (accelerometric) and from-outside (RAR) measurements are highlighted and discussed. A relevant conclusion is that, after strong earthquakes, RAR may be an interesting and useful tool, as it allows surveying the structural response of mid-rise buildings remotely, without the need to enter the structures, which may be dangerous for inspectors or technicians in cases of severely damaged buildings. Given that the instrumented building suffered significant damage, the ability of these kinds of measurements to detect damage is also discussed.

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Application of Particle Motion Technique to Structural Modal Identification of Heritage Buildings

Cited by 14 publications

References 16 publications

Dynamic investigation of a large historical cathedral

Dynamic investigation of a large historical cathedral

Combining ground penetrating radar and seismic surveys in the assessment of cultural heritage buildings: The study of roofs, columns, and ground of the gothic church Santa Maria del Mar, in Barcelona (Spain)

Dynamic Monitoring of a Mid-Rise Building by Real-Aperture Radar Interferometer: Advantages and Limitations

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