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Research Article

Prediction of performance of UHPFRC flexural member under blast loading

Rizwanullah, H.K. Sharma

Department of Civil Engineering, National Institute of Technology, Kurukshetra, (Haryana) India

Keywords

Abstract





UHPFRC;


Spalling and Scabbing;


Damage behaviour;


Flexural member;


Total deformation

An explosion within or near a building can cause terrible damage to the building. Ultra-high performance fibre reinforced concrete (UHPFRC) increases the strength and ductility of designing the structural elements with reduced sections. UHPFRC has a better load-carrying capacity, tensile strength (TS), and enhanced energy absorption capacity than the normal strength concrete (NSC) and high-performance concrete (HPC). This study focuses on understanding the behaviour of UHPFRC and HPC structural elements when subjected to the blast loading. Stress-strain behaviour, total deformation versus time response, and other ductility associated characteristics of UHPFRC based structural elements under blast loading of different charge weights were investigated. The design was carried out according to unified facilities criteria (UFC: 3-340-02). The total deformation of the beam was verified and compared with computed ANSYS R18.1 generated result. A significant reduction in total deformation was observed in UHPFRC compared to HPC and NSC structural elements. Flexural member designed to withstand a blast of 1.315 kN was found to resist a blast load of 5 kN within elastic range and up to 15 kN in the plastic field due to the inclusion of UHPFRC. The use of UHPFRC made the structural elements to reduced section dimensions thereby, decreasing the dead load, which is always advantageous in earthquake-resistant structures. UHPFRC can benefit blast-resistant facilities under high strain rates because of its extremely higher force capacity for the same size and reinforcement.

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2023 Reviewer Awards:

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2023 Best Paper Award:

The paper authored by Ferzan Fidan, Naim Aslan, Mümin Mehmet Koç entitled as “Morpho-structural and compressive mechanical properties of graphene oxide reinforced hydroxyapatite scaffolds for bone tissue applications” is awarded.



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The paper authored by Ercan Işık, Ehsan Harirchian, Hüseyin Bilgin, Kirti Jadhav entitled as “The effect of material strength and discontinuity in RC structures according to different site-specific design spectra" is awarded.


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