000013580 001__ 13580
000013580 005__ 20161114165847.0
000013580 04107 $$aeng
000013580 046__ $$k2011-05-25
000013580 100__ $$aBermejo, M.
000013580 24500 $$aImpact and Explosive Loads on Concrete Buildings Using Shell and Beam Type Elements

000013580 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013580 260__ $$bNational Technical University of Athens, 2011
000013580 506__ $$arestricted
000013580 520__ $$2eng$$aThe threat of impact or explosive loads is regrettably a scenario to be taken into account in the design of lifeline or critical civilian buildings. These are often made of concrete and not specifically designed for military threats. Numerical simulation of such cases may be undertaken with the aid of state of the art explicit dynamic codes, however several difficult challenges are inherent to such models: the material modeling for the concrete anisotropic failure, consideration of reinforcement bars and important structural details, adequate modeling of pressure waves from explosions in complex geometries, and efficient solution to models of complete buildings which can realistically assess failure modes. In this work we employ LS-Dyna for calculation, with Lagrangian finite elements and explicit time integration. Reinforced concrete may be represented in a fairly accurate fashion with recent models such as CSCM model [1] and segregated rebars constrained within the continuum mesh. However, such models cannot be realistically employed for complete models of large buildings, due to limitations of time and computer resources. The use of structural beam and shell elements for this purpose would be the obvious solution, with much lower computational cost. However, this modeling requires careful calibration in order to reproduce adequately the highly nonlinear response of structural concrete members, including bending with and without compression, cracking or plastic crushing, plastic deformation of reinforcement, erosion of vanished elements etc. The main objective of this work is to provide a strategy for modeling such scenarios based on structural elements, using available material models for structural elements [2] and techniques to include the reinforcement in a realistic way. These models are calibrated against fully threedimensional models and shown to be accurate enough. At the same time they provide the basis for realistic simulation of impact and explosion on full-scale buildings.

000013580 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013580 653__ $$aBlast, Bombing, Reinforcement Concrete, Waffle Slab, Frame-type Building, Progressive Colapse.

000013580 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013580 720__ $$aBermejo, M.$$iGoicolea J., M.$$iGabaldon, F.$$iSantos, A.
000013580 8560_ $$ffischerc@itam.cas.cz
000013580 8564_ $$s807788$$uhttp://invenio.itam.cas.cz/record/13580/files/316.pdf$$yOriginal version of the author's contribution as presented on CD, section: RS 01 Numerical Simulation for Structural Dynamics  .
000013580 962__ $$r13401
000013580 980__ $$aPAPER