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Ara es mostren els items 158-177 de 213

    • Rain-wind-induced cable vibrations in the Alamillo cable-stayed bridge (Sevilla, Spain): assessment and remedial action 

      Casas Rius, Joan Ramon; Aparicio Bengoechea, Ángel Carlos (2010-10)
      Article
      Accés obert
      Rain combined with wind action provoking vibration has been observed in the longest stays of the Alamillo cablestayed bridge in Sevilla (Spain). The maximum displacements observed are in the order of magnitude of 0.5 m and ...

    • Refuerzo de puentes por cambio de esquema estructural: optimización mediante algoritmo genético 

      Valenzuela, Matías A.; Casas Rius, Joan Ramon (Asociacion Científica del Hormigón Estructural (ACHE), 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      La presente comunicación entrega un estudio detallado del proceso constructivo y de tesado para el refuerzo de puentes con tipología longitudinal de vigas continuas convirtiéndolos en puentes en arco atirantado (tipo ...

    • Reliability and redundancy of bridge systems under lateral loads 

      Anitori, Giorgio; Casas Rius, Joan Ramon; Ghosn, Michel (American Society of Civil Engineers (ASCE), 2011)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      A methodology is proposed to analyze the structural redundancy of bridge systems under lateral loads. The paper compares the results obtained from a probabilistic approach to those of a simplified deterministic analysis. ...

    • Reliability-based approach to the robustness of corroded reinforced concrete structures 

      Cavaco, E. S.; Neves, Luís A.C; Casas Rius, Joan Ramon (2017-04)
      Article
      Accés obert
      Currently, decisions on the maintenance and repair of infrastructural assets, structures in particular, are mostly based on the results of inspections and the resulting condition index, neglecting system robustness and ...

    • Reliability-based assessment of masonry arch bridges 

      Casas Rius, Joan Ramon (2011-04)
      Article
      Accés obert
      The paper presents a methodology for the probabilistic assessment of masonry arches at the serviceability and ultimate limit states. First, it explains the definition of the different failure modes and corresponding limit ...

    • Remote sensing-based structural health monitoring and damage assessment 

      Valença, Jonatas; Qin, Xiaoqiong; Chang, Ling; Dong, Jie; Shi, Xuguo; Casas Rius, Joan Ramon (Multidisciplinary Digital Publishing Institute (MDPI), 2024-03-26)
      Article
      Accés obert
      With the rapid development of society and the economy, significant infrastructure, such as roads, buildings, high-speed railways, and bridges, have been built all over the world. However, the increase in operating time ...

    • Requirements and challenges for infusion of SHM systems within Digital Twin platforms 

      Chacón Flores, Rolando Antonio; Casas Rius, Joan Ramon; Ramonell Cazador, Carlos; Posada Cárcamo, Héctor José; Stipanovic, Irina; Škaric Palic, Sandra (Taylor & Francis Group, 2023-06)
      Article
      Accés obert
      The need for measurable data from physical assets to actively feed a living Digital Twin (DT) is paramount. The requirements and needs that the gathered data should fulfill in order to be practically implemented in the ...

    • Residual service life of a deteriorated retaining wall near the Terrassa railway station based on evidence 

      Casas Rius, Joan Ramon; Alegre Heitzmann, Vicente; Comellas Oliva, Josep (Féderation Internationale du Béton (fib), 2023)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A part of the retaining earth wall of the main line of the Catalonian railways (FGC), close to the station of Terrassa collapsed abruptly and without any previous warning. The collapse of this part of the wall provoked the ...

    • Respuesta de puentes frente a acciones sísmicas 

      Maldonado Rondón, Esperanza; Canas Torres, José Antonio; Casas Rius, Joan Ramon; Pujades Beneit, Lluís (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 1998)
      Llibre
      Accés obert
      Este trabajo tiene como objetivo el estudiar los aspectos más importantes involucrados en la respuesta de un puente ante la acción símica. Aspectos como la modelación del puente ante la acción sísmica, la determinación de ...

    • 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 ...

    • Robustness analysis of deteriorating reinforced concrete slabs 

      Cavaco, E. S.; Neves, L. A. C.; Gonçalves, Rui; Casas Rius, Joan Ramon (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Corrosion of reinforcement bars in concrete structures is the most significant deterioration mechanism in these structures. Corrosion is extremely difficult to predict and, consequently, can be regarded as an unpredictable ...

    • Robustness and health monitoring of existing bridges 

      Casas Rius, Joan Ramon (Associação Portuguesa para a Segurança e Conservação de Pontes (ASCP), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The paper shows how the robustness concept, mainly developed and thought for the design of new structures, and the monitoring by suitable sensors based on fiber optics can also play a relevant role in the safety and ...

    • Robustness of optimal sensor methods in dynamic testing–comparison and implementation on a footbridge 

      Lizana Vilaseca, Marc; Casas Rius, Joan Ramon (2022-06)
      Article
      Accés obert
      One of the objectives of structural health monitoring (SHM) is to maximize the information while keeping the number of sensors, and consequently the cost of the sensor system, to a minimum. Besides, the sensor configurations ...

    • Role of sensors in error propagation with the dynamic constrained observability method 

      Peng, Tian; Nogal Macho, María; Casas Rius, Joan Ramon; Turmo Coderque, José (Multidisciplinary Digital Publishing Institute (MDPI), 2021-05)
      Article
      Accés obert
      The inverse problem of structural system identification is prone to ill-conditioning issues; thus, uniqueness and stability cannot be guaranteed. This issue tends to amplify the error propagation of both the epistemic and ...

    • Safety factor calibration for a new model of shear strength of reinforced concrete building beams and slabs 

      Bairán García, Jesús Miguel; Casas Rius, Joan Ramon (2018-10)
      Article
      Accés obert
      When assessing existing structures, the availability of adequate safety factors, calibrated with the most accurate models, and for established target reliability indexes, is of critical importance in order to take the right ...

    • Safety factors for CFRP strengthening in bending of reinforced concrete bridges 

      Trentin, Caterina; Casas Rius, Joan Ramon (2015-09)
      Article
      Accés obert
      Concerning the strengthening in bending of reinforced concrete bridge decks, the use of fiber reinforced polymers (FRP) has increased due to its easy application and excellent mechanical and chemical properties. However, ...

    • Seismic behavior of RNC-isolated bridges: a comparative study under near-fault, long-period, and pulse-like ground motions 

      Ismail, Mohammed; Rodellar Benedé, José; Casas Rius, Joan Ramon (2016-01)
      Article
      Accés obert
      This paper introduces a recent seismic isolation system, named Roll-in-Cage (RNC) isolator, for efficient protection of bridges against destructive earthquakes. The RNC isolator is a rolling-based isolation system with ...

    • Seismic performance of deteriorated concrete bridges: bonding failure effects 

      Bartolozzi, Mara; Casas Rius, Joan Ramon; Domaneschi, Marco (Féderation Internationale du Béton (fib), 2020)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Nowadays, seismic study of corroded reinforced concrete elements is a matter of increasing concern, in particular for links such as bridges in infrastructural networks. In a starting step of an ongoing research, a bridge ...

    • Seismic performance of deteriorating concrete bridges 

      Domaneschi, Marco; De Gaetano, Antonino; Cimellaro, Gian Paolo; Casas Rius, Joan Ramon (CRC Press, 2021)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This study examines the effect of corrosion on reinforced concrete structural elements of a bridge overpass in seismic affected areas. Starting from a literature review to identify the existing deteriorating models, a case ...

    • 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 ...