Steel and Composite Structures

  • 제30권3호
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  • Pages.217-230
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  • 2019
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Experimental and numerical investigation of RC sandwich panels with helical springs under free air blast loads

  • Rashad, Mohamed (Department of Civil Engineering, University of British Columbia) ;
  • Wahab, Mostafa M.A. (Department of Civil Engineering, Military Technical Collage) ;
  • Yang, T.Y. (International Joint Research Laboratory of Earthquake Engineering, Tongji University)
  • 투고 : 2018.03.28
  • 심사 : 2019.01.25
  • 발행 : 2019.02.10
⟨ 이전 논문 다음 논문 ⟩

초록

One of the most important design criteria in underground structure is to design lightweight protective layers to resist significant blast loads. Sandwich blast resistant panels are commonly used to protect underground structures. The front face of the sandwich panel is designed to resist the blast load and the core is designed to mitigate the blast energy from reaching the back panel. The design is to allow the sandwich panel to be repaired efficiently. Hence, the underground structure can be used under repeated blast loads. In this study, a novel sandwich panel, named RC panel - Helical springs- RC panel (RHR) sandwich panel, which consists of normal strength reinforced concrete (RC) panels at the front and the back and steel compression helical springs in the middle, is proposed. In this study, a detailed 3D nonlinear numerical analysis is proposed using the nonlinear finite element software, AUTODYN. The accuracy of the blast load and RHR Sandwich panel modelling are validated using available experimental results. The results show that the proposed finite element model can be used efficiently and effectively to simulate the nonlinear dynamic behaviour of the newly proposed RHR sandwich panels under different ranges of free air blast loads. Detailed parameter study is then conducted using the validated finite element model. The results show that the newly proposed RHR sandwich panel can be used as a reliable and effective lightweight protective layer for underground structures.

키워드

과제정보

연구 과제 주관 기관 : National Science Foundation China

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피인용 문헌

  1. Study on the propagation mechanism of blast waves using the ultra-dynamic strain test system vol.28, pp.1, 2019, https://doi.org/10.12989/sss.2021.28.1.143