Calderón García, PA.; Glisic, B. (2012). Influence of mechanical and geometrical properties of embedded long-gauge strain sensors on the accuracy of strain measurement. Measurement Science and Technology. (23):1-15. doi:10.1088/0957-0233/23/6/065604
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/50308
Title:
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Influence of mechanical and geometrical properties of embedded long-gauge strain sensors on the accuracy of strain measurement
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Author:
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Calderón García, Pedro Antonio
Glisic, B.
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UPV Unit:
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Universitat Politècnica de València. Departamento de Ingeniería de la Construcción y de Proyectos de Ingeniería Civil - Departament d'Enginyeria de la Construcció i de Projectes d'Enginyeria Civil
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Issued date:
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Abstract:
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In many civil and geotechnical applications it is of interest to monitor the strain deep inside the structure; consequently, it is necessary to embed the sensors into the structure's material. Construction and geotechnical ...[+]
In many civil and geotechnical applications it is of interest to monitor the strain deep inside the structure; consequently, it is necessary to embed the sensors into the structure's material. Construction and geotechnical materials, such as concrete and soil, can be affected by local defects, e.g. cracks, air pockets and inclusions. To monitor these materials at a structural level it is necessary to use long-gauge sensors. As the sensor has to be embedded in the host material, its presence causes perturbation of the strain field and influences the accuracy of the strain measurement. The aim of this research was to identify the critical parameters that influence the accuracy of the strain measurement, to study how these parameters affect the accuracy, and to give recommendations for sensor users. The study was based on finite element analysis and all involved materials were assumed to have the MöhrCoulomb elastic, perfectly plastic behavior. A suitability of the numerical model for the analysis was verified using the experimental results of two cases reported in the literature and one on-site application. The study revealed that the most important parameters that influence the accuracy of the strain measurement are the goodness of interaction (strain transfer) between the host material and the anchor pieces of the sensor, the ratio between equivalent Young's modulus of the sensor and the Young's modulus of the host material, the radius of the anchor piece and the gauge length. The numerical model and parametric study are presented in detail along with practical recommendations. © 2012 IOP Publishing Ltd.
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Subjects:
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Accuracy of strain measurement
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Concrete structures
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Embedded fiber optic sensors
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Geotechnical applications
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Long-gauge sensors
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Air pockets
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Critical parameter
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Equivalent Young's modulus
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Gauge length
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Geometrical property
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Geotechnical application
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Geotechnical material
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Host materials
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Local defects
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Parametric study
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Plastic behavior
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Practical recommendation
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Strain fields
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Strain sensors
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Strain transfer
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Young's Modulus
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Concrete construction
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Cracks
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Elastic moduli
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Elasticity
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Finite element method
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Gages
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Numerical models
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Sound insulating materials
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Strain measurement
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Sensors
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Copyrigths:
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Reserva de todos los derechos
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Source:
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Measurement Science and Technology. (issn:
0957-0233
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DOI:
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10.1088/0957-0233/23/6/065604
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Publisher:
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IOP Publishing: Hybrid Open Access
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Publisher version:
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http://dx.doi.org/10.1088/0957-0233/23/6/065604
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Project ID:
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Spanish Ministry of Education [O.M. EDU/1456/2010
PR2010-0293]
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Thanks:
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The authors would like to thank the Spanish Ministry of Education, with support received under the National Program for Mobility of Researchers (O.M. EDU/1456/2010, ref. PR2010-0293) which enabled the joint work that made ...[+]
The authors would like to thank the Spanish Ministry of Education, with support received under the National Program for Mobility of Researchers (O.M. EDU/1456/2010, ref. PR2010-0293) which enabled the joint work that made this study possible. The Streicker Bridge project was realized with help of Turner Construction Co., HNTB, AG Construction Corp., Vollers Excavating & Constr., SMARTEC SA, Micron Optics, Princeton Facilities, and staff and students of CEE department of Princeton University.
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Type:
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Artículo
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