Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Assessment of Aircraft Hangar Vulnerability Under Blast Load and Its Retrofitting Using FRP Strips and Auxiliary Frame

Document Type : Original Article

Authors
Mahdi Yazdani 1
seied ahmad hosseini 2
1 Ph.D student, Faculty of Civil Engineering, Iran University of Science and Technology, Tehran, Iran
2 Assistant Prof., Faculty of Passive Defense Engineering, Malek Ashtar University of Technology, Tehran, Iran
10.22065/jsce.2024.476828.3512
Abstract
Given the increasing military threats, adhering to passive defense requirements in infrastructure is inevitable. Among the important infrastructures, aircraft hangars, due to the significant investments they house, can be targeted as strategic objectives in military and terrorist operations. Therefore, this study evaluates the vulnerability of aircraft hangars to explosions. The ABAQUS software is used to model the response of the aircraft hangar to blast loads. Additionally, the masonry wall is modeled using the macro method, and for modeling masonry materials, steel sections, and FRP strips, the damaged concrete plasticity model, Johnson-Cook model, and Hashin model are used, respectively. In this research, after validating the proposed numerical model with a credible study, the response of structural and non-structural components in both unreinforced and FRP-reinforced states is examined. As expected, the non-structural components (masonry wall) of the aircraft hangar, unlike its structural components, performed poorly against the explosion and lost their stability. To reinforce them, FRP sheets were adhered to the walls to evaluate their impact on the behavior of the masonry wall and the effect of various parameters such as fiber type, coverage percentage, reinforced side of the wall, width, thickness, and angle of strips. The results showed that the used FRP sheets could reduce wall deformations and significantly increase the energy dissipation from the explosion wave. Ultimately, the proposed optimal arrangement is the use of FRP strips with carbon fibers horizontally, with a thickness of 1 mm, width of 20 cm, and 50% coverage of the wall surface on both sides.
Keywords
Aircraft Hangar
Blast
Retrofitting
FRP Composite
Numerical Modeling

Subjects

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  • Receive Date 20 September 2024
  • Revise Date 16 November 2024
  • Accept Date 28 November 2024