TY - JOUR
T1 - Effect of combined blast and fragmentation load on the dynamic response of reinforced concrete structures
AU - Grisaro, Hezi Y.
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/12/1
Y1 - 2021/12/1
N2 - The current paper presents an improved model for the dynamic response of RC wall to a combined load of blast and fragmentation, as a result of a cased charge detonation. The model considers the damage inflicted by the fragments and their additional momentum, as well as the more realistic blast load. The main aim of the study is to compare the more realistic structural response to existing design methodologies that neglect the fragmentation effects or treat them in a simplified manner. After the model validation, this comparison is done through a parametric study to investigate the effects of various parameters on the results. It is found that the concrete compressive strength, reinforcement ratio, and charge height are not dominant factors for studying the level of the conservativeness of existing methodologies. The standoff distance, cross-section thickness, and casing to charge mass ratio were found to strongly influence the differences between the design methodologies.
AB - The current paper presents an improved model for the dynamic response of RC wall to a combined load of blast and fragmentation, as a result of a cased charge detonation. The model considers the damage inflicted by the fragments and their additional momentum, as well as the more realistic blast load. The main aim of the study is to compare the more realistic structural response to existing design methodologies that neglect the fragmentation effects or treat them in a simplified manner. After the model validation, this comparison is done through a parametric study to investigate the effects of various parameters on the results. It is found that the concrete compressive strength, reinforcement ratio, and charge height are not dominant factors for studying the level of the conservativeness of existing methodologies. The standoff distance, cross-section thickness, and casing to charge mass ratio were found to strongly influence the differences between the design methodologies.
KW - Blast loads
KW - Combined blast and fragments
KW - Dynamic response
KW - Protective structures
KW - Reinforced concrete
UR - http://www.scopus.com/inward/record.url?scp=85115792543&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2021.113244
DO - 10.1016/j.engstruct.2021.113244
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AN - SCOPUS:85115792543
SN - 0141-0296
VL - 248
JO - Engineering Structures
JF - Engineering Structures
M1 - 113244
ER -