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Communications at congresses:
A methodology to calibrate structural finite element models for reinforced concrete structures subject to blast loads
Year:2014
Research Areas
  • Civil engineering
Information
Abstract
Civil buildings are not specifically designed to support blast loads, but it is important to take into account these potential scenarios because of their catastrophic effects, on persons and structures. A practical way to consider explosions on reinforced concrete structures is necessary. With this objective we propose a methodology to evaluate blast loads on large concrete buildings, using LS-DYNA code for calculation, with Lagrangian finite elements and explicit time integration. The methodology has three steps. First, individual structural elements of the building like columns and slabs are studied, using continuum 3D elements models subjected to blast loads. In these models reinforced concrete is represented with high precision, using advanced material models such as CSCM_CONCRETE model, and segregated rebars constrained within the continuum mesh. Regrettably this approach cannot be used for large structures because of its excessive computational cost. Second, models based on structural elements are developed, using shells and beam elements. In these models concrete is represented using CONCRETE_EC2 model and segregated rebars with offset formulation, being calibrated with continuum elements models from step one to obtain the same structural response: displacement, velocity, acceleration, damage and erosion. Third, models basedon structural elements are used to develop large models of complete buildings. They are used to study the global response of buildings subjected to blast loads and progressive collapse. This article carries out different techniques needed to calibrate properly the models based on structural elements, using shells and beam elements, in order to provide results of sufficient accuracy that can be used with moderate computational cost.
International
Si
Congress
EURODYN 2014: 9th International Conference on Structural Dynamics,
960
Place
Oporto. Portugal
Reviewers
Si
ISBN/ISSN
978-972-752-165-4
Start Date
30/06/2014
End Date
02/07/2014
From page
3497
To page
3502
Proceedings of the IX International Conference on Structural Dynamics, EURODYN2014
Participants
  • Autor: Mario Bermejo Castro (UPM)
  • Autor: Anastasio Pedro Santos Yanguas (UPM)
  • Autor: Jose Maria Goicolea Ruigomez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Mecánica Computacional
  • Grupo de Investigación: Ingeniería de Georrecursos y Modelización
  • Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)
  • Departamento: Mecánica de Medios Continuos y Teoría de Estructuras
  • Departamento: Ingeniería Geológica y Minera
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