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Ara es mostren els items 102-121 de 166

    • New methodology for calculating damage variables evolution in Plastic Damage Model for RC structures 

      Alfarah, Bashar; López Almansa, Francisco; Oller Martínez, Sergio Horacio (2017-02-01)
      Article
      Accés obert
      The behavior of reinforced concrete (RC) structures under severe demands, as strong ground motions, is highly complex; this is mainly due to joint operation of concrete and steel, with several coupled failure modes. ...

    • New tension-compression damage model for complex analysis of concrete structures 

      Paredes, Jairo A.; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (American Society of Civil Engineers (ASCE), 2016-10)
      Article
      Accés obert
      A new damage model, based on continuum damage mechanics and simulating the opening, closing, and reopening of cracks in concrete using only one surface of discontinuity, is proposed in this article. The model complies with ...

    • Non linear structural analysis: application for evaluating seismic safety 

      Vielma Pérez, Juan Carlos; Barbat Barbat, Horia Alejandro; Oller Martínez, Sergio Horacio; Alvarado, Lisandro (Nova Science Publishers, Inc.,, 2010-01-04)
      Capítol de llibre
      Accés restringit per política de l'editorial
      Performance-Based Design is currently accepted commonly as the most advanced design and evaluation approach. However, successful application of this procedure depends largely on the ability to accurately estimate the ...

    • Non-linear mechanical damage modelling for long fibre-reinforced laminates 

      Rastellini, Fernando G.; Salomón, Ramón Omar; Oller Martínez, Sergio Horacio; Oñate Ibáñez de Navarra, Eugenio (2006)
      Text en actes de congrés
      Accés obert
      A computational methodology is presented for modelling the material non-linear mechanical behaviour of composite structures made of FRP (Fibre-Reinforced Plastic) laminates. The model is based on the appropriate combination ...

    • Nonlinear constitutive formulation for a finite deformation beam model based on the mixing rule for composites 

      Mata Almonacid, Pablo; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro; Boroschek Krauskopf, Rubén Luis (2007)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Constitutive nonlinearity for beam models has been traditionally described by means of concentrated and distributed models, in the most cases, formulated assuming infinitesimal deformation. The concentrated models consider ...

    • Novel approach combining two homogenization procedures for the analysis of nonwoven biocomposites 

      Martínez García, Javier; Bachmann, Jens; Otero Gruer, Fermín Enrique; Oller Martínez, Sergio Horacio; Bugeda Castelltort, Gabriel (Taylor & Francis Group, 2022-11-29)
      Article
      Accés obert
      Composite materials with complex internal microstructures, such as the flax nonwoven bio-composite studied in this work, require advanced numerical models in order to predict their mechanical performance. Otherwise, the ...

    • Numerical code for seismic analysis of structures incorporating energy dissipating devices 

      Mata Almonacid, Pablo; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro; Boroschek Krauskopf, Rubén Luis (2007-09-03)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The nonlinear dynamic response of civil structures with energy dissipating devices is studied. The structure is modeled using the Vu Quoc–Simo formulation for beams in finite deformation. The effects of shear stresses are ...

    • 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 obert
      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 modeling of a cervical spine discectomy 

      Comellas Sanfeliu, Ester; Oller Martínez, Sergio Horacio; Poblete, José; Berenguer, Joan; Prats-Galino, Alberto (Asociación Argentina de Mecánica Computacional, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Cervical spine discectomy is a relatively common medical procedure which entails the surgical removal of a herniated intervertebral disc which is then replaced with an adequate prosthesis. Surgeons rely on their expertise ...

    • Numerical modelling of behaviour of carbon nanotube-reinforced composites 

      Otero-Gruer, Fermín; Oller Martínez, Sergio Horacio; Martínez García, Javier; Salomón, Ramón Omar (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2011)
      Text en actes de congrés
      Accés obert
      Since their discovery by Lijima in 1991[1], carbon nanotubes (CNTs), are considered a new generation of reinforcement [2]. Their "nano" size structure makes them potentially free of defects, which provides them with ...

    • Numerical modelling of behaviour of carbon nanotube-reinforced composites 

      Otero Gruer, Fermín Enrique; Oller Martínez, Sergio Horacio; Martínez García, Javier; Salomon, O. (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      Since their discovery by Lijima in 1991[1], carbon nanotubes (CNTs), are considered a new generation of reinforcement [2]. Their "nano" size structure makes them potentially free of defects, which provides them with excellent ...

    • Numerical modelling of the seismic response of buildings with energy dissipators 

      Barbat Barbat, Horia Alejandro; Mata Almonacid, Pablo; Oller Martínez, Sergio Horacio (2008)
      Text en actes de congrés
      Accés restringit per política de l'editorial

    • Numerical modelling of the seismic response of buildings with energy dissipators 

      Barbat Barbat, Horia Alejandro; Oller Martínez, Sergio Horacio; Mata Almonacid, Pablo; Vielma, Juan Carlos (2007-06-01)
      Text en actes de congrés
      Accés obert
      The poor performance of many framed RC structures in recent strong earthquakes has alerted about the need of improving their seismic behavior especially when they are designed according to obsolete seismic codes. Sometimes, ...

    • Numerical simulation of RC frame testing with damaged plasticity model 

      López Almansa, Francisco; Alfarah, Bashar; Oller Martínez, Sergio Horacio (European Association for Earthquake Engineering, 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This study aims to investigate the capacity of simplified and advanced numerical models to reproduce the nonlinear monotonic behavior of reinforced concrete framed structures. The considered simplified models are commonly ...

    • Numerical simulation of the inelastic seismic response of RC structures with energy dissipators 

      Mata Almonacid, Pablo; Barbat Barbat, Horia Alejandro; Oller Martínez, Sergio Horacio; Boroschek Krauskopf, Rubén Luis (2008)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The nonlinear dynamic response of RC buildings with dissipators is studied using advanced computational techniques. A fully 3D geometric and constitutive nonlinear model is used for the description of the dynamic behavior ...

    • Numerical study of vibrations induced by traffic in structures and a screen alternative for its mitigation 

      Quinteros, Ricardo D.; Barbat Barbat, Horia Alejandro; Nallim, Liz G.; Oller Martínez, Sergio Horacio (2019-12)
      Article
      Accés obert
      The effect of traffic vibrations on buildings is of special interest as its sources have multiplied becoming a concern for residents or for those who work, visit or preserve buildings of heritage value. The problem has ...

    • Numerical study on the relevance of columns hidden failure modes in the seismic capacity of non-ductile RC Frames 

      Alfarah, Bashar; López Almansa, Francisco; Oller Martínez, Sergio Horacio (2018-04-11)
      Article
      Accés obert
      In simplified seismic structural analyses, not all the deterioration modes are adequately considered. This work discusses the relation among the hidden failure modes of columns of non-ductile reinforced concrete building ...

    • Numerical tool to study structural reinforcement of steel reinforced concrete (RC) structures under seismic loads using fiber reinforced polymers (FRP) 

      Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (2007-09-03)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Strengthening or retrofitting existing structures in order to increase their ductility and improve their seismic response has traditionally been accomplished using conventional materials and construction techniques. Composite ...

    • Numerical validation of the incremental launching method of a steel bridge through a small-scale experimental study 

      Chacón Flores, Rolando Antonio; Uribe Sasiain, Nicolás; Oller Martínez, Sergio Horacio (2016-02)
      Article
      Accés obert
      This article presents an experimental and a numerical study of an incremental launching process of a steel bridge. The former is deployed in a scale-reduced laboratory,whereas the latter is performed using the finite ...

    • Numerical validation of the incremental launching method of a steel bridge through a small-scale experimental study 

      Chacón Flores, Rolando Antonio; Uribe, N.; Oller Martínez, Sergio Horacio (2013)
      Article
      Accés obert
      This article presents an experimental and a numerical study of an incremental launching process of a steel bridge. The former is deployed in a scale-reduced laboratory,whereas the latter is performed using the finite ...