Behavior of strengthened reinforced concrete coupling beams by bolted steel plates, Part 2: Evaluation of theoretical strength

다국어 초록 (Multilingual Abstract)

Composite beams using bolts to attach steel plates to the side faces of existing reinforced concrete (RC) coupling beams can enhance both their strength and deformability. The behavior of those composite beams differs substantially from the behavior of typical composite beams made up of steel beams and concrete slabs. The former are subjected to longitudinal, vertical and rotational slips, while the latter only involve longitudinal slip. In this study, a mixed analysis method was adopted to develop the fundamental equations for accurate prediction of the load-carrying capacity of steel plate strengthened RC coupling beams. Then, a rigid plastic analysis technique was used to cope with the full composite effect of the bolt group connections. Two theoretical models for the determination of the strength of mediumlength plate strengthened coupling beams based on mixed analysis and rigid plastic methods are presented. The strength of the strengthened coupling beams is derived. The vertical and longitudinal slips of the steel plates and the shear strength of the anchor-bolt connection group is considered. The theoretical models are validated by the available experimental results presented in a companion paper. The strength of the specimens predicted from the mixed analysis model is found to be in good agreement with that from the experimental results.

참고문헌 (Reference)

1 Oehlers, D.J, "Transverse and longitudinal partial interaction in composite bolted side-plated reinforced-concrete beams" 5 (5): 553-563, 1997

2 Newmark, N.M, "Tests and analysis of composite beams with incomplete interaction" 9 (9): 75-92, 1951

3 Cheng,L.S.B, "Stress-strain curve of concrete under compression" Department of Civil Engineering, The University of Hong Kong 2001

4 Y. Zhu, "Seismic behavior of strengthened reinforced concrete coupling beams by bolted steel plates, Part 1: Experimental study" 국제구조공학회 27 (27): 149-172, 2007

5 Oehlers,D.J, "Reinforced concrete beams with plates glued to their soffits" 118 (118): 2023-2038, 1992

6 Su, R.K.L, "Nonlinear response of bolt groups under in-plane loading" 29 (29): 626-634, 2007

7 Siu, W.H, "Load-deformation prediction for eccentrically loaded bolt groups by a kinematic hardening approach" 65 (65): 436-442, 2009

8 Oehlers, D.J, "Flexural strength of composite beams with limited slip capacity shear connectors" 121 (121): 932-938, 1995

9 Oehlers, D.J, "Elementary Behavior of Composite Steel and Concrete Structural Members" Butterworth Heinemann 1999

10 Kwan, A.K.H, "Elastic modulus of normal and high strength concrete in Hong Kong" 8 (8): 10-15, 2001

11 Johnson,R.P, "Composite Structures in Steel and Concrete" Blackwell Scientific 1994

12 Oehlers, D.J, "Composite Steel and Concrete Structural Members: Fundamental Behavior" Pergamon Press 1995

13 ACI Committee 349, "Code requirements for nuclear safety related concrete structures (ACI-349-01) and Commentary (ACI 349R-01)" American Concrete Institute 2001

14 BSI, "BS8110 Part 1: Code of practice for design and construction, structural use of concrete" British Standards Institution 1997