Browse > Article
http://dx.doi.org/10.4334/JKCI.2003.15.3.417

Bearing Strength of Concrete Column and Steel Beam Composite Joints  

Kim, Byong-Kook (Dept. of Architectural Engineering, Soong-Sil University)
Lee, Won-Kyu (Dept. of Architectural Engineering, Soong-Sil University)
Choi, Oan-Chul (Dept. of Architectural Engineering, Soong-Sil University)
Publication Information
Journal of the Korea Concrete Institute / v.15, no.3, 2003 , pp. 417-424 More about this Journal
Abstract
A bearing failure in RCS(Reinforced Concrete Column and Steel Beam) system is recognized as one of the distinct joint failure modes for the composite frames. Vertical and transverse reinforcement in addition to concrete are effective for better transfer of vortical forces through concrete bearing. To examine the effect of the vertical bars, tie bars, a U-type detail developed in this study and concrete confinement, local bearing tests were conducted using 22 small-scale concrete block specimens. Test results show that vertical reinforcement and tie bars mainly contribute to the bearing capacity. However larger amounts of tie reinforcement are required than those recommend from ASCE guidelines, to apply the nominal concrete strength as 2 $f_{ck}$ over the bearing area. Cross ties are proved to be highly effective for resisting the vertical forces. Maximum bearing strength can be increased upto 2.5 $f_{ck}$ . An accurate prediction model for bearing strength is proposed for better design of the composite Joint.
Keywords
local bearing test; bearing strength; RCS composite joint; tie bar;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Seikh, T.M., 'Moment Connections Between Steet Beams and Concrete Columns,' Ph.D. Disseration, Department of Civil Engineering, The Univ. of Texas at Austin, 1987, PP.147-204
2 ACI-ASCE Committee 352, 'Recommendations for Design of Beam Column Joints in Monolithic Reinforced Concrete Structures' Report ACI 352R-85, 1985, PP.1-12
3 최완철, 조필규, 송진규, '반복하중을 받는 철근콘크리트 기둥과 철골보 합성골조의 접합부 성능', 대한건축학회구조계 논문집, 15권, 4호, 1999, pp.27-36
4 최광호, 이세웅, 김상식, '철근콘크리트와 철근보의 접합부 휨 저하 성능 연구', 대한건축학회, 학술발표 논문집,18권,1호,1998, pp.667-672
5 O. C. Choi et al., 'Bearing Strength of Composite Joints between Steel Beams and Reinforced Concrete Columns,' Proceedings of 6th ASCCS, LosAngeles, U.S.A, 2000, pp.761-767
6 ACI Committee 318, 'Building Code Require ment for Reinforced Concrete(ACI 318-95) and Commentary(ACI 318R-95),' ACI, Detroit, U.S.A, 1995, pp.17-1, 17-20
7 AIJ, 'Design and. Construction of Mixed Structures Composed of Reinforced Concrete Columns and Steet Bearns,' 2001, Japan, pp.53-82
8 Mattock, A and Gaafar G., 'Strength of Embedded Steel Sections as Brackets,' ACI Journal, Vol. 79, No.2, March-Apiil, 1982, PP.83-92
9 민병렬, 최문식, '중심 축하중을 받는 철골 주각부의 철근보강에 따른 지압강도에 대한 실험적 연구', 대한건축학회논문집, 13권, 8호, 1997, PP.175-185
10 Kanno, R., 'Strength, Deformation., and Seismic Resistonce of joints Between Steel Beams and Reinforced Concrete Columns,' Ph.D. Thesis, Comell Univ, 1993, PP.7-50
11 Deierlein, G.G., 'Design of Moment Connections for Composite Framed Structures' Ph.D. Dissertation, Department of Civil Engineenng, The Univ. of Texas at Austin, 1988, pp.148-201
12 Darwin, D. et. al., 'Guidelines for Design of Joints Between Steel Beams and Reinforced Concrete Column,' journal of Struct. Div., ASCE, Vol.120, No.8, 1994, pp.2330-2357   DOI   ScienceOn