Resistance of full-scale beams against close-in explosions.Numerical modeling and field tests  

作　　者：A.Prado A.Alañón R.Castedo A.P.Santos L.M.López M.Chiquito M.Bermejo C.Oggeri 

机构地区：[1]Escuela Politécnica Superior dé Avila,Universidad de Salamanca,Ávila,05003,Spain [2]E.T.S.I.Minas y Energía,Universidad Politecnica de Madrid,Madrid,28003,Spain [3]Department of Engineering,Aviation and Technology,Saint Louis University,Madrid,28003,Spain [4]Department of Environment,Land and Infrastructure Engineering(DIATI),Politecnico di Torino,Torino,10129,Italy

出　　处：《Defence Technology（防务技术）》2024年第10期35-47,共13页Defence Technology

基　　金：This research has been conducted under SEGTRANS project,funded by the Centre for Industrial Technological Development(CDTI,Government of Spain).

摘　　要：This paper explores the performances of a finite element simulation including four concrete models applied to a full-scale reinforced concrete beam subjected to blast loading. Field test data has been used to compare model results for each case. The numerical modelling has been, carried out using the suitable code LS-DYNA. This code integrates blast load routine(CONWEP) for the explosive description and four different material models for the concrete including: Karagozian & Case Concrete, Winfrith, Continuous Surface Cap Model and Riedel-Hiermaier-Thoma models, with concrete meshing based on 10, 15, and 20 mm. Six full-scale beams were tested: four of them used for the initial calibration of the numerical model and two more tests at lower scaled distances. For calibration, field data obtained employing pressure and accelerometers transducers were compared with the results derived from the numerical simulation. Damage surfaces and the shape of rupture in the beams have been used as references for comparison. Influence of the meshing on accelerations has been put in evidence and for some models the shape and size of the damage in the beams produced maximum differences around 15%. In all cases, the variations between material and mesh models are shown and discussed.

关 键 词：Blast test Numerical simulation LS-DYNA Concrete model Mesh effect Full-scale beams 

分 类 号：TJ06[兵器科学与技术—兵器发射理论与技术]