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http://dx.doi.org/10.11112/jksmi.2010.14.6.188

Strength of RC Beam with Various Shear Reinforcement Ratios After Experiencing Different Duration of Fire Load  

Seo, Soo-Yeon (충주대학교 건축공학과)
Jeoung, Chae-Myeoung (토담구조)
Choi, Ki-Bong (경원대학교 건축공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.14, no.6, 2010 , pp. 188-197 More about this Journal
Abstract
This paper presents research result to study the change of structural capacity of reinforced concrete beams with various shear reinforcement ratios after damage by fire load. In addition, fundamental data are given in order to predict the strength variation of RC member due to fire damage by evaluating the previous calculation method codified in codes. Nine RC beam specimens were made and exposed to the fire controled by the standard fire curve. And the structural capacity was evaluated through a failure test under simple support condition. Previous code formula, ACI code and Eurocode were reviewed and used for the calculation of the strength of specimens damaged by fire. From the test, RC beam specimens exhibited very brittle failure when it exposed to fire controled by standard fire curve during more than one hour. And this failure pattern tended to be more serious when shear reinforcement ratio decreased or fire loading duration increased. From the evaluation of the calculation process in code, the change of strength due to fire can be properly predicted if the damage of materials is well defined.
Keywords
Shear reinforcement ratio; fire load; failure test; duration; brittle failure;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Eurocode 2, Design of Concrete Structures, ENV 1992-1-2: General Relse-Structural Fire Design, European Committee for Standardization, Brussels, Belguim.
2 소방방재청, 2008년도 화재통계연감, 소방방재청, 2009.
3 소방방재청, 2009년도 화재통계연감, 소방방재청, 2010.
4 서수연, 김영만, 최기봉, "화재손상된 철근콘크리트 깊은 보의 전단경간비에 따른 구조성능 변화", 대한건축학회 논문집, 게재예정.
5 이소진, 신영수, 이차돈, 홍성걸, "화재피해를 입은 일반 강도 철근콘크리트 휨부재의 구조거동", 한국콘크리트학회 2002년 가을학술발표회, pp.307-312.
6 한국표준협회, 건축 구조 부재의 내화 시험 방법, 한국산업규격 KS F 2257, 1999.
7 한국콘크리트학회, 콘크리트구조설계기준 해설, 2007, pp.154-155.
8 ACI Committee 216, "Code Requirements for Determining Fire Resistance of Concrete and Masonry Construction Assemblies", American Concrete Institute, 2007.3.
9 Buchanan, A. H., Fire Engineering Design Guide, Second Edition, Centre for Advanced Engineering, University of Canterbury, New Zealand, 2001.
10 Charles Chadwell, XTRACT-Cross Section Analysis Program for Structural Engineers, Imbsen Sofrware Systems, 2004.