Modelling of damage patterns of RC concrete columns under demolition by blasting

Zidan, M. K.; Fayed, M. N.; Elhosiny, A. M.; Abdelgawad, K. M.; Orfy, H. H.

doi:10.2495/susi140091

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…In the second numerical modelling approach with no air region, the burst load is modelled using Jones-Wilkins-Lee (JWL) equation of state defines pressure as a function of relative volume, V, and internal energy per initial volume, E, C1, C2, r1 and r2 are constants and e,  and v are the internal energy, adiabatic constant and specific volume respectively, and its ideals for explosives determined by dynamic tests, Equation 5presents the pressure value. The blast load is modelled using the 8-node finite element concept (MAT_HIGH_EXPLOSIVE_BURN) material model with the knowledge (INITIAL_DETONATION) [42].…”

Section: Explosive Materials Modelmentioning

confidence: 99%

Effect of Blast Loading on Seismically Detailed RC Columns and Buildings

et al. 2021

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Explosions caused by standoff charges near buildings have drastic effects on the internal and external structural elements which can cause loss of life and fatal injuries in case of failure or collapse of the structural element. Providing structural elements with blast resistance is therefore gaining increasing importance. This paper presents numerical investigation of RC columns with different reinforcement detailing subjected to near-field explosions. Detailed finite element models are made using LS-DYNA software package for several columns having seismic and conventional reinforcement detailing which were previously tested under blast loads. The numerical results show agreement with the published experimental results regarding displacements and damage pattern. Seismic detailing of columns enhances the failure shape of the column and decrease the displacement values compared to columns with conventional reinforcement detailing. Further, the effect of several modeling parameters are studied such as mesh sensitivity analysis, inclusion of air medium and erosion values on the displacements and damage pattern. The results show that decreasing the mesh size, increasing erosion value and inclusion of air region provide results that are very close to experimental results. Additionally, application is made on a slab-column multistory building provided with protective walls having different connection details subjected to blast loads. The results of this study are presented and discussed. Use of a top and bottom floor slab connection of protective RC walls are better than using the full connection at the four sides to the adjacent columns and slabs. This leads to minimizing the distortion and failure of column, and therefore it increases the chance of saving the building from collapse and saving human lives. Doi: 10.28991/cej-2021-03091733 Full Text: PDF

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Section: Explosive Materials Modelmentioning

confidence: 99%

Effect of Blast Loading on Seismically Detailed RC Columns and Buildings

et al. 2021

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“…It is obvious that some data and phenomena are difficult to be observed from the experimental works can easily be accessed in numerical simulations. Various researchers performed intensive numerical simulations of FEA using LS-DYNA program to investigate the response RC columns when subjected to blast loading [2,3,4,5,6,7,8]. Abladey [9] used AUTODYN program to investigate the behavior of RC columns under close-in blast loads.…”

Section: Introductionmentioning

confidence: 99%