Using Ground Radar Interferometry for Precise Determining of Deformation and Vertical Deflection of Structures

Talich, Milan

doi:10.1088/1755-1315/95/3/032021

Cited by 12 publications

(4 citation statements)

References 1 publication

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“…In the field of structural health monitoring [7], great benefits have been introduced by terrestrial radar interferometry with a real aperture antenna (also referred to as TInRAR), being such a technique contactless, non-destructive, non-sensitive to dust, and able to detect displacements with an accuracy of tenths of millimeters [8,9,10,11,12,13,14,15,16,17]. Moreover, several authors have introduced benefits in the dynamic surveying of historical buildings and towers from high-speed real aperture radar interferometry under static and dynamic loads, for instance in the procedures devoted to the static and seismic vulnerability analyses [1,18,19,20,21].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Assessment of Masonry Towers Based on Terrestrial Radar Interferometer and Accelerometers

Castagnetti

Bassoli

Vincenzi

et al. 2019

Sensors

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This paper discusses the performance of a terrestrial radar interferometer for the structural monitoring of ancient masonry towers. High-speed radar interferometry is an innovative and powerful remote sensing technique for the dynamic monitoring of large structures since it is contactless, non-destructive, and able to measure fast displacements on the order of tenths of millimeters. This methodology was tested on a masonry tower of great historical interest, the Saint Prospero bell tower (Northern Italy). To evaluate the quality of the results, data collected from the interferometer were compared and validated with those provided by two types of accelerometer-based measuring systems directly installed on the tower. Dynamic tests were conducted in operational conditions as well as during a bell concert. The first aimed at characterizing the dynamic behavior of the tower, while the second allowed to evaluate the bell swinging effects. Results showed a good agreement among the different measuring systems and demonstrated the potential of the radar interferometry for the dynamic monitoring of structures, with special focus on the need for an accurate design of the geometric aspects of the surveys.

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Section: Introductionmentioning

confidence: 99%

Dynamic Assessment of Masonry Towers Based on Terrestrial Radar Interferometer and Accelerometers

Castagnetti

Bassoli

Vincenzi

et al. 2019

Sensors

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“…Next examples, advantages, limitations and possible applications are for example in [Owerko et al, 2012], [Pieraccini, 2013] and [Talich, 2017].…”

Section: General Principles Of Using Technology In Practicementioning

confidence: 99%

Monitoring of Horizontal Movements of High-Rise Buildings and Tower Transmitters by Means of Ground-Based Interferometric Radar

Talich

2018

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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<p><strong>Abstract.</strong> The paper describes possibilities of the relatively new technics &ndash; ground based radar interferometry for precise determining of deformation of structures. Special focus on the horizontal movements of high-rise buildings and on the tower transmitters is presented. The technology of ground based radar interferometry can be used in practice to the contactless determination of deformations of such structures with accuracy up to 0.01&thinsp;mm in real time. It is also possible to capture oscillations of the object with a frequency up to 50&thinsp;Hz in real time. Deformations can be determined simultaneously in multiple places of the object, for example in the case of high-rise buildings it is possible to monitor the horizontal vibration of the whole object at its different height levels intervals of one or more meters. It is possible to detect and determine the compound oscillations that occur in some types of such buildings. This allows to obtain both overall and detailed information about the properties of the structure during its dynamic load e.g. by wind. Then prevent any damage or even disasters in these objects. In addition to the necessary theory basic principles of using radar interferometry for determining of deformation of structures are given. Practical examples of determining of horizontal movements of high-rise building and tower transmitter are also given. The IBIS-S interferometric radar of the Italian IDS manufacturer was used for the measurements.</p>

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“…The second stage of the experiment was performed in December 2019 when the dynamic response of the footbridge deck to pedestrian traffic was measured by two different methods using classical approach [1,2] carried out by six piezoelectric accelerometers and radar interferometry [3][4][5]. Basic objectives of the second stage were to evaluate the fundamental modal characteristics of the footbridge and to verify new approach to dynamic response measurement -radar interferometry realized by two synchronized radars.…”

Section: Introductionmentioning

confidence: 99%

Experimental dynamic analysis of the existing footbridge in Dobřichovice town

et al. 2020

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The paper presents an experimental dynamic analysis of the existing footbridge across the Berounka River in Dobřichovice town, Czech Republic. The experiment was realized in two stages. The main purpose of the first one was the vibration response determination of the footbridge induced by pedestrians. At first, the natural frequencies and mode shapes of its horizontal load-bearing structure were measured and then the footbridge was loaded by different groups of pedestrians. The response was observed and dynamic behaviour of the footbridge was evaluated. In the course of the second stage of the experiment, the dynamic response of the footbridge deck to pedestrian traffic was measured by two different methods using radar interferometry and classical approach realized by piezoelectric accelerometers. Basic objectives of the second stage were to evaluate the fundamental modal characteristics of the footbridge and to verify new approach to dynamic response measurement – radar interferometry realized by two synchronized radars.

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Using Ground Radar Interferometry for Precise Determining of Deformation and Vertical Deflection of Structures

Cited by 12 publications

References 1 publication

Dynamic Assessment of Masonry Towers Based on Terrestrial Radar Interferometer and Accelerometers

Dynamic Assessment of Masonry Towers Based on Terrestrial Radar Interferometer and Accelerometers

Monitoring of Horizontal Movements of High-Rise Buildings and Tower Transmitters by Means of Ground-Based Interferometric Radar

Experimental dynamic analysis of the existing footbridge in Dobřichovice town

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