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Structural Pounding Under Surface Blast Conditions by Considering and Ignoring the Effect of Soil Structure Interaction
https://orcid.org/http://orcid.org/0000-0002-6378-2682
https://orcid.org/http://orcid.org/0000-0002-8596-9042
A Structural pounding is most commonly observed failure when tremor hits the area, that’s happen due to insufficient spacing between the two structural units. Pounding induced a high amount of acceleration pulses which mostly causes the structural failure. In the present paper three elastic and inelastic closely spaced equal heights eight-storey structure in the form of stick spring mass system is studied under surface blast actions. The lateral dynamic loads are applied to the structures considering pounding effect under the presence and absence of soil structure interactions (SSI) at the base considering Winkler spring model. The floor pounding and linear systems are considered for the entire systems under time domain analysis. A single case of three adjacent G + 7 stick systems is formulated and run using SAP 2000NL software for 25 kg blast charge weight and 15 m standoff distance. The results of this MDOF system under surface blast loading are quantified in the forms of time histories of upper floor displacements, upper floor level pounding forces, and base shear forces. The results indicate that displacement response in SSI models is much severe than fixed base system. The inelastic system experiences more displacements than the elastic system. The SSI underrates the base shear values compared to fixed base system and elastic models have developed more amounts of base shear values compared to inelastic system. The increases of blast charge weights have produce more catastrophic effects in the structures under structural pounding. In SSI models the pounding forces are lesser than the fixed base system.
Structural Pounding Under Surface Blast Conditions by Considering and Ignoring the Effect of Soil Structure Interaction
https://orcid.org/http://orcid.org/0000-0002-6378-2682
https://orcid.org/http://orcid.org/0000-0002-8596-9042
A Structural pounding is most commonly observed failure when tremor hits the area, that’s happen due to insufficient spacing between the two structural units. Pounding induced a high amount of acceleration pulses which mostly causes the structural failure. In the present paper three elastic and inelastic closely spaced equal heights eight-storey structure in the form of stick spring mass system is studied under surface blast actions. The lateral dynamic loads are applied to the structures considering pounding effect under the presence and absence of soil structure interactions (SSI) at the base considering Winkler spring model. The floor pounding and linear systems are considered for the entire systems under time domain analysis. A single case of three adjacent G + 7 stick systems is formulated and run using SAP 2000NL software for 25 kg blast charge weight and 15 m standoff distance. The results of this MDOF system under surface blast loading are quantified in the forms of time histories of upper floor displacements, upper floor level pounding forces, and base shear forces. The results indicate that displacement response in SSI models is much severe than fixed base system. The inelastic system experiences more displacements than the elastic system. The SSI underrates the base shear values compared to fixed base system and elastic models have developed more amounts of base shear values compared to inelastic system. The increases of blast charge weights have produce more catastrophic effects in the structures under structural pounding. In SSI models the pounding forces are lesser than the fixed base system.
Structural Pounding Under Surface Blast Conditions by Considering and Ignoring the Effect of Soil Structure Interaction
https://orcid.org/http://orcid.org/0000-0002-6378-2682
https://orcid.org/http://orcid.org/0000-0002-8596-9042
A Structural pounding is most commonly observed failure when tremor hits the area, that’s happen due to insufficient spacing between the two structural units. Pounding induced a high amount of acceleration pulses which mostly causes the structural failure. In the present paper three elastic and inelastic closely spaced equal heights eight-storey structure in the form of stick spring mass system is studied under surface blast actions. The lateral dynamic loads are applied to the structures considering pounding effect under the presence and absence of soil structure interactions (SSI) at the base considering Winkler spring model. The floor pounding and linear systems are considered for the entire systems under time domain analysis. A single case of three adjacent G + 7 stick systems is formulated and run using SAP 2000NL software for 25 kg blast charge weight and 15 m standoff distance. The results of this MDOF system under surface blast loading are quantified in the forms of time histories of upper floor displacements, upper floor level pounding forces, and base shear forces. The results indicate that displacement response in SSI models is much severe than fixed base system. The inelastic system experiences more displacements than the elastic system. The SSI underrates the base shear values compared to fixed base system and elastic models have developed more amounts of base shear values compared to inelastic system. The increases of blast charge weights have produce more catastrophic effects in the structures under structural pounding. In SSI models the pounding forces are lesser than the fixed base system.
Structural Pounding Under Surface Blast Conditions by Considering and Ignoring the Effect of Soil Structure Interaction
Lecture Notes in Civil Engineering
Kumar, Ratnesh (editor) / Bakre, Sachin V. (editor) / Goel, Manmohan Dass (editor) / Pote, Rohit (author) / Mate, Nilesh (author) / Kangda, Muhammed Zain (author)
Structural Engineering Convention ; 2023 ; Nagpur, India
2024-11-24
12 pages
Article/Chapter (Book)
Electronic Resource
English
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