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Passive 3D motion optical data in shaking table tests of a SRG-reinforced masonry wall
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  • Journal title : Earthquakes and Structures
  • Volume 10, Issue 1,  2016, pp.53-71
  • Publisher : Techno-Press
  • DOI : 10.12989/eas.2016.10.1.053
 Title & Authors
Passive 3D motion optical data in shaking table tests of a SRG-reinforced masonry wall
De Canio, Gerardo; de Felice, Gianmarco; De Santis, Stefano; Giocoli, Alessandro; Mongelli, Marialuisa; Paolacci, Fabrizio; Roselli, Ivan;
 Abstract
Unconventional computer vision and image processing techniques offer significant advantages for experimental applications to shaking table testing, as they allow the overcoming of most typical problems of traditional sensors, such as encumbrance, limitations in the number of devices, range restrictions and risk of damage of the instruments in case of specimen failure. In this study, a 3D motion optical system was applied to analyze shake table tests carried out, up to failure, on a natural-scale masonry structure retrofitted with steel reinforced grout (SRG). The system makes use of wireless passive spherical retro-reflecting markers positioned on several points of the specimen, whose spatial displacements are recorded by near-infrared digital cameras. Analyses in the time domain allowed the monitoring of the deformations of the wall and of crack development through a displacement data processing (DDP) procedure implemented ad hoc. Fundamental frequencies and modal shapes were calculated in the frequency domain through an integrated methodology of experimental/operational modal analysis (EMA/OMA) techniques with 3D finite element analysis (FEA). Meaningful information on the structural response (e.g., displacements, damage development, and dynamic properties) were obtained, profitably integrating the results from conventional measurements. Furthermore, the comparison between 3D motion system and traditional instruments (i.e., displacement transducers and accelerometers) permitted a mutual validation of both experimental data and measurement methods.
 Keywords
3D optical measurement;passive markers;steel reinforced grout;shaking table;structural damage monitoring;modal analysis;
 Language
English
 Cited by
1.
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Quasi real-time FEM calibration by 3D displacement measurements of large shaking table tests using HPC resources, Advances in Engineering Software, 2016  crossref(new windwow)
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Full-scale tests on masonry vaults strengthened with Steel Reinforced Grout, Composites Part B: Engineering, 2018, 141, 20  crossref(new windwow)
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Round Robin Test on tensile and bond behaviour of Steel Reinforced Grout systems, Composites Part B: Engineering, 2017, 127, 100  crossref(new windwow)
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Retrofitting Masonry Vaults with Basalt Textile Reinforced Mortar, Key Engineering Materials, 2017, 747, 250  crossref(new windwow)
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Methods and Challenges for the Seismic Assessment of Historic Masonry Structures, International Journal of Architectural Heritage, 2016, 1  crossref(new windwow)
8.
Experimental analysis on tensile and bond properties of PBO and aramid fabric reinforced cementitious matrix for strengthening masonry structures, Composites Part B: Engineering, 2017, 127, 175  crossref(new windwow)
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