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Limitations of Simplified Analysis Procedures Used for Calculation of Blast Response of Structures
https://orcid.org/https://orcid.org/0000-0001-8878-1312
https://orcid.org/https://orcid.org/0000-0002-2582-1900
The current state of practice in the blast-resistant design of structural members relies on simplified single-degree-of-freedom (SDOF) to calculate the response quantities. An equivalent SDOF representation of a structural member is obtained by assuming a deflected shape with equal deflection at the assumed degree of freedom. The blast load is approximated as a triangular pulse load. The response of an elastic and elasto-plastic SDOF system to triangular pulse is widely available in the literature. The utility of simplified SDOF procedures is mostly limited to calculating displacement response of regular-shaped members subject to far-field detonations. This paper investigates the limitations of the simplified SDOF method and role of various parameters (e.g., shape, standoff distance, boundary conditions, positive phase) on response quantities of interests (e.g., displacement, shear force). The simplified SDOF results are verified using advanced finite element model of the steel column in LS-DYNA. The findings of the study are summarized, and recommendations are provided for usage of simplified SDOF procedures for the blast-resistant design of structures.
Limitations of Simplified Analysis Procedures Used for Calculation of Blast Response of Structures
https://orcid.org/https://orcid.org/0000-0001-8878-1312
https://orcid.org/https://orcid.org/0000-0002-2582-1900
The current state of practice in the blast-resistant design of structural members relies on simplified single-degree-of-freedom (SDOF) to calculate the response quantities. An equivalent SDOF representation of a structural member is obtained by assuming a deflected shape with equal deflection at the assumed degree of freedom. The blast load is approximated as a triangular pulse load. The response of an elastic and elasto-plastic SDOF system to triangular pulse is widely available in the literature. The utility of simplified SDOF procedures is mostly limited to calculating displacement response of regular-shaped members subject to far-field detonations. This paper investigates the limitations of the simplified SDOF method and role of various parameters (e.g., shape, standoff distance, boundary conditions, positive phase) on response quantities of interests (e.g., displacement, shear force). The simplified SDOF results are verified using advanced finite element model of the steel column in LS-DYNA. The findings of the study are summarized, and recommendations are provided for usage of simplified SDOF procedures for the blast-resistant design of structures.
Limitations of Simplified Analysis Procedures Used for Calculation of Blast Response of Structures
https://orcid.org/https://orcid.org/0000-0001-8878-1312
https://orcid.org/https://orcid.org/0000-0002-2582-1900
The current state of practice in the blast-resistant design of structural members relies on simplified single-degree-of-freedom (SDOF) to calculate the response quantities. An equivalent SDOF representation of a structural member is obtained by assuming a deflected shape with equal deflection at the assumed degree of freedom. The blast load is approximated as a triangular pulse load. The response of an elastic and elasto-plastic SDOF system to triangular pulse is widely available in the literature. The utility of simplified SDOF procedures is mostly limited to calculating displacement response of regular-shaped members subject to far-field detonations. This paper investigates the limitations of the simplified SDOF method and role of various parameters (e.g., shape, standoff distance, boundary conditions, positive phase) on response quantities of interests (e.g., displacement, shear force). The simplified SDOF results are verified using advanced finite element model of the steel column in LS-DYNA. The findings of the study are summarized, and recommendations are provided for usage of simplified SDOF procedures for the blast-resistant design of structures.
Limitations of Simplified Analysis Procedures Used for Calculation of Blast Response of Structures
Lecture Notes in Civil Engineering
Saha, Sandip Kumar (Herausgeber:in) / Mukherjee, Mousumi (Herausgeber:in) / Anjani, K. K. (Autor:in) / Kumar, Manish (Autor:in)
24.11.2020
18 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Simplified SDOF analysis , Finite element analysis , Shape functions Engineering , Theoretical and Applied Mechanics , Structural Materials , Theoretical, Mathematical and Computational Physics , Mathematical and Computational Engineering , Geotechnical Engineering & Applied Earth Sciences , Geoengineering, Foundations, Hydraulics
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