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Title |
Damage Evaluation of Bi-directionally Prestressed Concrete Panels under Blast-fire Combined Loading
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Authors |
최지훈(Ji-Hun Choi) ; 최승재(Seung-Jai Choi) ; 김태균(Tae-Kyun Kim) ; 김장호(Jang-Ho Jay Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2017.29.3.237 |
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Keywords |
극한하중 ; 2방향 비부착 프리스트레스트 콘크리트 ; 폭발하중 ; 화재하중 ; 폭발 후 화재하중 extreme loading ; bi-directional unbonded PSC ; blast loading ; fire loading ; blast-fire combined loading |
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Abstract |
Frequent terror or military attack by explosion, impact, fire accidents have occurred recently. These attacks and incidents raised public concerns and anxiety of potential terrorist attacks on important infrastructures. However, structural behavioral researches on prestressed concrete (PSC) infrastructures such as Prestressed Concrete Containment Vessel (PCCV) and Liquefied Natural Gas (LNG) storage tanks under extreme loading are significantly lacking at this time. Also, researches on possible secondary fire scenarios after terror and bomb explosion has not been performed yet. Therefore, a study on PSC structural behavior from an blast-induced fire scenario was undertaken. To evaluate the blast-fire combined resistance capacity and its protective performance of bi-directional unbonded PSC member, blast-fire tests were carried out on 1,400 mm × 1,000 mm × 300 mm PSC specimens. Blast loading tests were performed by the detonation of 25 kg ANFO explosive charge at 1.0 m standoff distance. Also, fire and blast-fire combined loading were tested using RABT fire loading curve. The test results are discussed in detail in the paper. The results can be used as basic research references for related research areas, which include protective design simulation under blast-fire combined loading.
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