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Experimental Evaluation of Internal Blast Resistance of Prestressed Concrete Tubular Structure according to Explosive Charge Weight

프리스트레스트 콘크리트 관형 구조물의 폭발량에 따른 내부폭발저항성능에 관한 실험적 평가

Choi, Ji Hun;Choi, Seung Jai;Yang, Dal Hun;Kim, Jang-Ho Jay
최지훈;최승재;양달훈;김장호

  • Received : 2018.12.18
  • Accepted : 2019.03.21
  • Published : 2019.06.01

Abstract

When a extreme loading such as blast is applied to prestressed concrete (PSC) structures and infrastructures for an instantaneous time, serious property damages and human casualties occur. However, a existing design procedure for PSC structures such as prestressed containment vessel (PCCV) and gas storage tank do not consider a protective design for extreme internal blast scenario. Particularly, an internal blast is much more dangerous than that of external blast. Therefore, verification of the internal blast loading is required. In this paper, the internal blast resistance capacity of PSC member is evaluated by performing internal blast tests on RC and bi-directional PSC scaled down specimens. The applied internal blast loads were 22.68, 27.22, and 31.75 kg (50, 60, and 70 lbs) ANFO explosive charge at 1,000 mm standoff distance. The data acquisitions include blast pressure, deflection, strain, crack patterns, and prestressing force. The test results showed that it is possible to predict the damage area to the structure when internal blast loading occurs in PCCV structures.

Keywords

PCCV;Extreme loading;Internal blast loading;Prestressed concrete (PSC)

Acknowledgement

Supported by : 한국연구재단