Journal of the Korean Society for Advanced Composite Structures (복합신소재구조학회 논문집)

Korean Society for Advanced Composite Structures (한국복합신소재구조학회)
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Design Optimization of Blast Resistant CFRP-steel Composite Structure Based on Reliability Analysis

신뢰성 해석에 의한 내폭 CFRP-steel 복합구조의 최적화 설계

  • Kim, Jung Joong (Department of Civil and Environmental Engineering, Sejong University) ;
  • Noh, Hyuk-Chun (Department of Civil and Environmental Engineering, Sejong University)
  • 김정중 (세종대학교 건설환경공학과) ;
  • 노혁천 (세종대학교 건설환경공학과)
  • Received : 2012.11.26
  • Accepted : 2012.12.21
  • Published : 2013.03.19
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Abstract

This study presents the effectiveness of a composite structure at improving blast resistance. The proposed composite structure consists of carbon fiber reinforced polymer (CFRP) and steel layers. While CFRP layer is used for blast energy reflection due to its high strength, steel layer is used for blast energy absorption due to its high ductility. A dynamic model is used to simulate the elastoplastic behavior of the proposed composite structure subject to blast load. Considering the magnitude variations of a blast event, the probability of failure of each layer is evaluated using reliability analysis. By assigning design probability of failure of each layer in the composite structure, the thickness of layers is optimized. A case study for the design of CFRP-steel composite structure subjected to an uncertain blast event is also presented.

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References

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