Ara es mostren els items 4-14 de 14

  • Bridge condition and safety based on measured vibration level 

    Casas Rius, Joan Ramon; Rodrigues, J. Fernando (International Association for Bridge and Structural Engineers (IABSE), 2015)
    Text en actes de congrés
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    Along the years, there were efforts by researchers in quantifying structural performance and damage in function of vibration measurements. Curves proposed by several authors try to relate acceleration spectrum to damage ...
  • Effect of of ageing and temperature on the fatigue behaviour of bitumens 

    Miró Recasens, José Rodrigo; Martínez Reguero, Adriana Haydée; Moreno Navarro, Fernando; Rubio Gámez, María del Carmen (2015-12)
    Article
    Accés restringit per política de l'editorial
    Bitumen ageing plays a significant role in determining the resistance of asphalt mixes to fatigue cracking. Regardless of the type of ageing (oxidation during manufacture or during the service life), hardening effects ...
  • Geometry of nanoindentation cube-corner cracks observed by FIB tomography: Implication for fracture resistance estimation 

    Cuadrado Lafoz, Núria; Seuba, J.; Casellas, D.; Anglada, M.; Jiménez Piqué, Emilio (Elsevier, 2015-09-01)
    Article
    Accés restringit per política de l'editorial
    When indenting a brittle material with a sharp indenter, cracks can be generated at the corners of the imprint. From the length of these cracks, the fracture resistance can be estimated. This technique is simple and allows ...
  • Irreversible entropy model for damage diagnosis in resistors 

    Cuadras Tomàs, Àngel; Crisóstomo, Javier; Ovejas Benedicto, Victòria Júlia; Quílez Figuerola, Marcos (American Institute of Physics (AIP), 2015-10-28)
    Article
    Accés obert
    We propose a method to characterize electrical resistor damage based on entropy measurements. Irreversible entropy and the rate at which it is generated are more convenient parameters than resistance for describing damage ...
  • 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 ...
  • Modelling fluid flow in opalinus clay excavation damage zone: a semi-analytical approach 

    Alcoverro Bassols, Jordi; Olivella Pastallé, Sebastià; Alonso Pérez de Agreda, Eduardo (2014-12)
    Article
    Accés restringit per política de l'editorial
    The HG-A in situ test, located at the Mont Terri Underground Rock Laboratory (URL), was analysed as part of the FORGE project. This test investigated the behaviour of the excavation damage zone (EDZ) around a backfilled ...
  • Numerical homogenization for composite materials analysis: comparison with other micro mechanical formulations 

    Otero Gruer, Fermín Enrique; Oller Martínez, Sergio Horacio; Martínez García, Javier; Salomón, Ramón Omar (2015-04)
    Article
    Accés restringit per política de l'editorial
    This work presents a two-scale homogenization procedure to analyze three dimension composite structures by FEM. The theory implemented is compared with other micro-structural formulations: micro models and serial parallel ...
  • Numerical simulation of failure involving multiple cracks with smoothed displacements. 

    Olm Serra, Marc (Universitat Politècnica de Catalunya, 2013-05-13)
    Tesina
    Accés obert
    To numerically simulate a failure process, damage models can be used. In order to avoid mesh dependency problems of local damage models, nonlocal models are employed. The use of nonlocal displacements is an efficient ...
  • Reduced kinematic formulation based on the strong discontinuity method for reinforced concrete components 

    Kishta, E.; Richard, B.; Giry, C.; Ragueneau, F. (CIMNE, 2015)
    Text en actes de congrés
    Accés obert
    Damage models, developed in the last decades, insure a continuous description of the fracture process zone in quasi-brittle materials but fail at representing fine information of the cracking features such as openings and ...
  • Strain localization and failure mechanics for elastoplastic damage solids 

    Wu, Jian-Ying; Cervera Ruiz, Miguel (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
    Llibre
    Accés restringit per política de l'editorial
    This work investigates systematically strain localization and failure mechanics for elastoplastic damage solids. Two complementary methodologies, i.e., traction-based discontinuities localized in an elastic solid and strain ...
  • Structural system identification of cable-stayed bridges with observability techniques 

    Lozano Galant, Jose Antono; Nogal Macho, María; Payá Zaforteza, Ignacio Javier; Turmo Coderque, José (2014)
    Article
    Accés restringit per política de l'editorial
    Cable-stayed bridges are highly statically redundant, light and flexible structures. This complexity highlights the role of the structural system identification (SSI) method in the calibration of the actual properties of ...