Ara es mostren els items 17-33 de 33

    • 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 ...
    • On the bonding performance of Distributed Optical Fiber Sensors (DOFS) in structural concrete 

      Barrias, Antonio; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (CRC Press, 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Distributed optical fiber sensors (DOFS) is one of the most promising and exciting technolo-gies under research to be applied in civil engineering infrastructures structural health monitoring (SHM). There-fore, in this ...
    • Performance analysis of distributed optical fiber bonding adhesives to concrete 

      Barrias, Antonio; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, the authors conducted an experiment where a reinforced concrete beam was in-strumented with a single DOFS performing four equal segments externally bonded to the bottom surface of the element. Each segment ...
    • Performance analysis of Distributed Optical Fiber Sensors on reinforced concrete elements under fatigue testing 

      Barrias, Antonio; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (International Federation for Structural Concrete (fib), 2018)
      Text en actes de congrés
      Accés obert
      Optical fiber sensors (OFS) have become increasingly popular on civil engineering structural health monitoring (SHM) applications in the last two decades. This is due to several advantages when compared to the more ...
    • Performance assessment of embedded distributed optical fiber sensors in reinforced concrete structures 

      Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (International Association for Bridge and Structural Engineers (IABSE), 2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, an experiment where distributed optical fiber sensors (DOFS) were implemented in two small concrete beams subjected to a three-point load test is outlined. Here, an optical backscatter reflectometry based ...
    • Review of civil engineering applications with distributed optical fiber sensors 

      Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      It’s widely recognized that during its lifetime, civil engineering structures are subjected to adverse changes that affect their condition and structural safety. In this way, the application of Structural Health Monitoring ...
    • Shear crack pattern identification in concrete elements via distributed optical fibre grid 

      Rodríguez Gutiérrez, Gerardo; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (2019-12)
      Article
      Accés obert
      An experimental methodology to obtain the shear cracking pattern in concrete elements is presented. The method is based on the use of Distributed Optical Fiber Sensors (DOFS) connected to an Optical Backscattered Reflectometer ...
    • Shear crack width assessment in concrete structures by 2D distributed optical fiber 

      Rodríguez, Gerardo; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (Elsevier, 2019-09)
      Article
      Accés obert
      This paper outlines the second part of an experimental study to show the capabilities of distributed optical fiber sensors (DOFS) in their application to the structural health monitoring (SHM) of the shear performance of ...
    • SHM by DOFS in civil engineering: a review 

      Casas Rius, Joan Ramon; Rodríguez, Gerardo; Villalba Herrero, Sergi (2015-12)
      Article
      Accés obert
      This paper provides an overview of the use of different Distributed Optical Fiber Sensor systems (DOFSs) to perform Structural Health Monitoring (SHM) in the specific case of civil engineering structures. Nowadays, there ...
    • SHM of reinforced concrete elements by Rayleigh backscattering DOFS 

      Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (2019-03)
      Article
      Accés obert
      This document showcases the latest research conducted within UPC–BarcelonaTech on the performance of distributed optical fiber sensors (DOFS), more specifically the case of the optical backscattered reflectometry (OBR) ...
    • Strain-monitoring of a concrete tunnel lining with distributed optical fiber sensors 

      Gómez i Esteve, Judit; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (International Society for Structural Health Monitoring of Intelligent Infrastructure (ISHMII), 2021)
      Text en actes de congrés
      Accés obert
      Despite their advantageous performance and reliability, distributed optical fiber sensors (DOFS) still constitute a recent technology and their reliability and accuracy when applied to real world structures is still under ...
    • Structural health monitoring with distributed optical fiber sensors of tunnel lining affected by nearby construction activity 

      Gómez i Esteve, Judit; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (2020-09)
      Article
      Accés obert
      This paper addresses the implementation of a Distributed Optical Fiber Sensor system (DOFS) to the TMB L-9 metro tunnel in Barcelona for Structural Health Monitoring (SHM) purposes as the former could potentially be affected ...
    • UPC—BarcelonaTech experience on the use of Rayleigh based distributed optical fiber sensors for SHM of concrete structures 

      Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Rodríguez, Gerardo; Villalba Herrero, Sergi (CRC Press, 2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In the past decade, several works and studies have been performed with the goal of improving the knowledge and developing new techniques associated with the application of Distributed Optical Fiber Sensors (DOFS) in order ...