Evaluation of the Potential of Cladding to Mitigate Blast Effects on the Supporting Structure
Publication: Practice Periodical on Structural Design and Construction
Volume 27, Issue 3
Abstract
Cladding components are critical when designing a building to resist blast loads, as they are the first to receive the applied airblast pressure. A recent trend is to design them in order to reduce the blast pressure transferred to the supporting structure, thus minimizing the overall load demand and consequences to the building frame. Therefore, it is desirable to develop a generally applicable method for evaluating the cladding performance in terms of blast pressure mitigation. In the present study, a methodology for calculating this mitigation potential is proposed, employing the dynamic load factor (DLF) of a dimensionless single-degree-of-freedom (SDOF) model subjected to blast for a variety of pressure and impulse combinations. The DLF of multiple SDOF analyses is used to calculate an overall indicator for the mitigation potential of the corresponding cladding. To further demonstrate the proposed methodology, four steel cladding types are analyzed, and their mitigation potential is mapped into their pressure–impulse diagrams. Furthermore, the effects of the activated mechanisms of plastic energy absorption and inertial resistance are presented through performance observations for the different geometry and boundary configurations of the four cladding types. Among the four cladding types, the best-and worst-performing ones were found to be a thick and a thin monolithic plate, respectively, while the performance of sandwich-type panels was in between. Generally, the analysis results suggest that the increased mass and plastic dissipation in the cladding are beneficial for the building frame, while increased stiffness may overload the building frame.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request:
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Matlab code (limited access may be provided upon request to the first author).
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Case study numerical models (limited access may be provided upon request to the first author).
Acknowledgments
This research is cofinanced by Greece and the European Union (European Social Fund–ESF) through the Operational Programme «Human Resources Development, Education and Lifelong Learning» in the context of the project “Strengthening Human Resources Research Potential via Doctorate Research” (MIS-5000432), implemented by the State Scholarships Foundation (IKY).
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Published In
Practice Periodical on Structural Design and Construction
Volume 27 • Issue 3 • August 2022
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© 2022 American Society of Civil Engineers.
History
Received: Oct 7, 2021
Accepted: Feb 8, 2022
Published online: Mar 30, 2022
Published in print: Aug 1, 2022
Discussion open until: Aug 30, 2022
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Cited by
- Orestis Ioannou, Michalis Hadjioannou, Charis J. Gantes, Xenofon A. Lignos, Experimental and Numerical Investigation of Cladding–Girt Systems Subjected to Blast Loading, Journal of Structural Engineering, 10.1061/JSENDH.STENG-11724, 149, 5, (2023).
- Orestis Ioannou, Michalis Hadjioannou, Charis J. Gantes, A 2DOF Method to Study the Influence of Cladding Characteristics on the Response of the Supporting Structure under Blast Loading, Journal of Structural Engineering, 10.1061/(ASCE)ST.1943-541X.0003494, 148, 12, (2022).