Numerical simulation of I-section steel beams under blast loading

There is significant interest amongst computational mechanics researchers in the area of investigating structures under blastloadingsince many recent collapses of buildings were dueto accidental or intentional explosion. Blast loads can result in partial collapse of the buildings and significant loss of life and property.Numerical methods can be used to simulate the explosion and so as to study the interaction between themRecent advances in numerical methods and developments in high-performance computer facilities have enabled engineers to simulate complicated blast scenarios and subsequently to provide usefulreference data for safeguarding design of critical infrastructure in the future.Therefore, the blast response of a simply supported W150×24 steel beams under two different shotswas studied using LS-DYNA FE code. Twodifferent explosion modelling methodswere used to apply the blast pressure on the steel beams. The maximum and residual deflection of beam then compared with the experiments available in literature. Since dynamic loads are much more complicated than static loads,all the parameters which could possibly affect the results should be assigned carefully. Hence, a comprehensive review on modelling techniques isexplained in this paper.Results indicated that the blast response of the steel beams can be predicted effectively in LS-DYNA when using LBE method to apply blast pressure on beams.Strain rate has significant effect on the response and Cowper-Symonds constants, C=3200 s-1and p=5, provides more accurate results

Keywords:

Numerical , I-section , Beam , Blast , Cowper-Symonds , LS-DYNA