Browse > Article
http://dx.doi.org/10.7781/kjoss.2015.27.2.143

Experimental and Numerical Study of Fire Resistance of Composite Beams  

Ahn, Jae Kwon (Department of Architecture and Architectural Engineering, Seoul National University)
Lee, Cheol Ho (Department of Architecture and Architectural Engineering, Seoul National University)
Publication Information
Journal of Korean Society of Steel Construction / v.27, no.2, 2015 , pp. 143-153 More about this Journal
Abstract
In this paper, the standard fire resistance test under load and associated numerical study were carried out to evaluate the fire resistance of unprotected partially encased beams and slimfloor beams. The temperature evolution and the deflection increase of the composite beam specimens were investigated and the effects of the key behavioral parameters including the load ratio, the reinforcement, and the fire exposure were analyzed. The test results showed that the temperature rise of the partially encased beams and slimfloor beams is considerably slow compared to the conventional H-shape composite beams. Up to at least 90 minutes, the reinforcements in the partially encased composite beams maintained below the temperature at which the cold steel strength is sustained. Unprotected partially encased beams and slimfloor beams in the experimental program achieved the fire resistance more than 2 hours according to the limiting deflection criteria. This implies that unprotected partially encased beams and slimfloor beams can be very promising alternatives to enhancing the fire resistance of steel beams. This study also conducted the fully coupled thermal-stress analysis by using the commercial code ABAQUS to the thermal and structural behaviour of composite beams in fire. The numerical predictions provide acceptable correlations with the experimental results.
Keywords
Partially encased beam; Slimfloor beam; Fire resistance test under load; Coupled thermal-stress analysis; Fire resistance;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 International Standards Organization (1999) ISO 834-1: Fire Resistance Test-Elements of Building Construction, ISO, Geneva.
2 한국표준협회(2006) KS F 2257-6: 건축 구조 부재의 내화시험 방법-보의 성능조건, 한국표준협회. Korea Standard Association (2006) KS F 2257-6: Methods Fire Resistance Test for Elements of Building Construction-Specific Requirements for Beams, KSA (in Korean).
3 British Standard Institution (1987) BS 476: Fire Tests on Building Materials and Structures, Part 20: Method for Determination of the Fire Resistance of Elements of Construction (General Principles), BSI, London.
4 ABAQUS (2010) ABAQUS Analysis User's Manual, SIMULIA.
5 Bailey, C.G., Newman, G.M., and Simms, W.I. (1999) Design of Steel Framed Buildings without Applied Fire Protection, The Steel Construction Institute, UK.
6 Incropera, F.P. and DeWitt, D.P. (2002) Fundamental of Heat and Mass Transfer, John Wiley & Sons, USA.
7 European Committee for Standardization (2005) Eurocode 4: Design of Composite Steel and Concrete Structures, Part 1.2: General Rules-Structural Fire Design, BSI, London.
8 Piloto, P., Gavilan, A., Zipponi, M., Marini, A., Mesquita, L., and Plizzari, G. (2013) Experimental Investigation of the Fire Resistance of Partially Encased Beams, Journal of Constructional Steel Research, Vol.80, pp.121-137.   DOI   ScienceOn
9 Ellobody, E. (2011) Nonlinear Behaviour of Unprotected Composite Slimfloor Steel Beams Exposed to Different Fire Conditions, Thin-Walled Structures, Vol.49, pp.762-771.   DOI   ScienceOn
10 김성배, 최승관, 이창남, 김상섭(2006) TSC 합성보의 내화성능에 관한 연구, 한국강구조학회 논문집, 제18권, 제1호, pp.113-122. Kim, S.B. Choi, S.K., Lee, C.N., and Kim, S.S. (2006) Study on the Fire Resistance Performance of the TSC Beam, Journal of Korean Society of Steel Construction, KSSC, Vol.18, No.1, pp.113-122 (in Korean).
11 이승재, 강성덕, 최승관, 김명한, 김상대(2006) iTECH 합성보의 내화성능에 대한 실험연구, 한국강구조학회논문집, 한국강구조학회, 제18권, 제5호, pp.643-653. Lee, S.J. Kang, S.D., Choi, S.K., Kim, M.H., and Kim, S.D. (2006) Experimental Study on the Fire Resistance of the iTECH Composite Beam, Journal of Korean Society of Steel Construction, KSSC, Vol.18, No.5, pp.643-653 (in Korean).
12 김성배, 김상섭, 유덕수, 최승관(2013) 신형상 U형 하이브리드 합성보의 내화성능에 관한 연구, 한국강구조학회논문집, 한국강구조학회, 제25권, 제4호, pp.379-388. Kim, S.B. Kim, S.S., Ryu, D.S., and Choi, S.K. (2013) Fire Resistance of U-shape Hybrid Composite Beam, Journal of Korean Society of Steel Construction, KSSC, Vol.25, No.4, pp.379-388 (in Korean).
13 한국표준협회(2005) KS F 2257-1: 건축 구조 부재의 내화시험 방법-일반요구사항, 한국표준협회. Korea Standard Association (2005) KS F 2257-1: Methods Fire Resistance Test for Elements of Building Construction-General Requirements, KSA (in Korean).