Ara es mostren els items 1-20 de 30

  • Application of distributed optical fiber sensors for the health monitoring of two real structures in Barcelona 

    Barrias, Antonio Jose de Sousa; Rodríguez, Gerardo; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (2018-07)
    Article
    Accés obert
    The versatility and ease of installation of Distributed Optical Fibre Sensors (DOFS) compared with traditional monitoring systems are important characteristics to consider when facing the Structural Health Monitoring (SHM) ...
  • Application of optical fiber distributed sensing to health monitoring of concrete structures 

    Villalba Herrero, Sergi; Casas Rius, Joan Ramon (2013-08)
    Article
    Accés restringit per política de l'editorial
    The use of Optical Backscatter Reflectometer (OBR) sensors is a promising measurement technology for Structural Health Monitoring (SHM) as it offers the possibility of continuous monitoring of strain and temperature along ...
  • Application study of embedded Rayleigh based Distributed Optical Fiber Sensors in concrete beams 

    Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (Elsevier, 2017)
    Text en actes de congrés
    Accés obert
    In this work, an experiment on two small concrete beams is described where Rayleigh based distributed optical fiber sensors (DOFS) are implemented together with traditional electrical strain gauges for the monitoring of ...
  • A review of distributed optical fiber sensors for civil engineering applications 

    Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (2016-05)
    Article
    Accés obert
    The application of structural health monitoring (SHM) systems to civil engineering structures has been a developing studied and practiced topic, that has allowed for a better understanding of structures’ conditions and ...
  • Assessing cracking characteristics of concrete structures by distributed optical fiber and non-linear finite element modelling 

    Rodríguez, Gerardo; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (Institut Français des Sciences et Technologies des Transports (IFSTTAR), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This work shows how the experimental strain data obtained with an OBR (Optical Backscattered Reflectometer) measuring system can be used to locate cracking before being visually observable and also to estimate the crack ...
  • Cracking assessment in concrete structures by distributed optical fiber 

    Rodríguez, Gerardo; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (2015-03)
    Article
    Accés obert
    In this paper, a method to obtain crack initiation, location and width in concrete structures subjected to bending and instrumented with an optical backscattered reflectometer (OBR) system is proposed. Continuous strain ...
  • Diseño y validación experimental de uniones mediante superposición con lazos en viaductos de hormigón de sección transversal evolutiva 

    Villalba Herrero, Sergi; Aparicio Bengoechea, Ángel Carlos; Casas Rius, Joan Ramon (Asociacion Científica del Hormigón Estructural (ACHE), 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    En este trabajo se estudia el diseño y la posterior validación experimental de una unión estructural de longitud limitada, basada en la superposición a través de lazos de armaduras yuxtapuestas, confinadas en su interior ...
  • Distributed optical fibre sensors in concrete structures: performance of bonding adhesives and influence of spatial resolution 

    Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (Wiley, 2019-03)
    Article
    Accés restringit per política de l'editorial
    In this paper, the authors conducted an experiment where a reinforced concrete beam was instrumented with a 5-m long polyimide single distributed optical fibre sensors (DOFS) performing four equal segments externally bonded ...
  • Embedded distributed optical fiber sensors in reinforced concrete structures: a case study 

    Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (Multidisciplinary Digital Publishing Institute (MDPI), 2018-04)
    Article
    Accés obert
    When using distributed optical fiber sensors (DOFS) on reinforced concrete structures, a compromise must be achieved between the protection requirements and robustness of the sensor deployment and the accuracy of the ...
  • Fatigue performance of distributed optical fiber sensors in reinforced concrete elements 

    Barrias, Antonio; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (Elsevier, 2019-09)
    Article
    Accés restringit per política de l'editorial
    In this paper, the authors present the results of a laboratory test where two reinforced concrete beams were instrumented with Distributed Optical Fiber Sensors (DOFS) to allow the monitoring g of strain in four different ...
  • Fatigue testing of reinforced concrete beam instrumented with distributed optical fiber sensors (DOFS) 

    Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (Civil Engineering Research Association of Ireland (CERAI), 2018)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The use of fiber optic sensors on civil engineering structural health monitoring (SHM) applications have become quite popular for the past two decades. Within this type of sensors however, the study and use of Optical ...
  • Feasibility of structural health monitoring of concrete structures by optical backscatter reflectometer 

    Villalba Herrero, Sergi; Fernández López, Antonio; Casas Rius, Joan Ramon; Güemes Gordo, Alfredo (2009-09)
    Text en actes de congrés
    Accés obert
    The use of Optical Backscaterr Reflectometer (OBR) sensors is a promising measurement technology for SHM as it offers the possibility of continuous monitoring of strain and temperature along the fibre. Several applications ...
  • Fiber optics for load testing 

    Casas Rius, Joan Ramon; Barrias, Antonio Jose de Sousa; Rodríguez, Gerardo; Villalba Herrero, Sergi (CRC Press, 2019)
    Capítol de llibre
    Accés restringit per política de l'editorial
    This chapter presents the application of fiber optic sensor technology in the monitoring of a load test. First, the description of the fiber optic technology is described with main emphasis in the case of distributed optical ...
  • Health monitoring of real structures by distributed optical fiber 

    Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi; Rodríguez, Gerardo (2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Two different existing structures monitored with distributed optical fiber sensors, are described in this paper. The principal Structural Health Monitoring (SHM) results of a valuable hospital rehabilitation and the ...
  • Long-term reliability assessment of OBR based DOFS on reinforced concrete elements 

    Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (International Association for Structural Control and Monitoring (IASCM), 2018)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The authors conducted a laboratory experiment where two reinforced concrete beams were instrumented with a Distributed Optical Fiber Sensors that were adhered to allow the measuring of strain on four different longitudinal ...
  • Management and safety of existing concrete structures via optical fiber distributed sensing 

    Casas Rius, Joan Ramon; Villalba Herrero, Sergi; Villalba Herrero, Vicenç (CRC Press Taylor & Francis Group, 2014)
    Capítol de llibre
    Accés restringit per política de l'editorial
    The use of Optical Backscatter Reflectometer (OBR) as a distributed fiber optic system to measure strain and detect cracking in concrete structures is investigated. A laboratory experience in a concrete slab is first ...
  • Monitoring of flexural and shear crack pattern in concrete structures by distributed optical fiber 

    Rodríguez, Gerardo; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (International Society for Structural Health Monitoring of Intelligent Infrastructure (ISHMII), 2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In the present paper, two methodologies to obtain flexural and shear crack pattern in concrete elements using distributed optical fiber are proposed. The first has been validated through experimental results of tests carried ...
  • Monitoring of shear cracking in partially prestressed concrete beams by distributed optical fiber sensors 

    Rodríguez, Gerardo; Casas Rius, Joan Ramon; Villalba Herrero, Sergi; Barrias, Antonio Jose de Sousa (CRC Press Taylor, 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In the present paper, a novel technique is used to monitor shear crack patterns in Partially Prestressed Concrete (PPC) beams. The proposed technique is based on experimental data obtained in two PPC beams tested in ...
  • Monitorización y salud estructural: aplicación de la fibra óptica distribuida (OBR) en estructuras de hormigón 

    Villalba Herrero, Sergi; Casas Rius, Joan Ramon (Asociacion Científica del Hormigón Estructural (ACHE), 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    El uso de la fibra óptica Optical Backscatter Reflectometer (OBR), es una tecnología de sensores de medición prometedora para la monitorización estructural (SHM) “Structural Health Monitoring”, ya que ofrece la posibilidad ...
  • New structural joint by rebar looping applied to staged box girder bridge construction: static tests 

    Villalba Herrero, Sergi; Casas Rius, Joan Ramon (2016-04)
    Article
    Accés obert
    This paper shows the design, development and experimental checking of a modified type of structural joint with limited length between concrete segments cast “in-situ”. The design concept is based on the development length ...