Nonlinear Finite-Element Analyses of Concrete Frame Corners
Publication: Journal of Structural Engineering
Volume 126, Issue 2
Abstract
A research project is currently being conducted to evaluate a new reinforcement detailing in frame corners in civil defense shelters where all reinforcement bars are spliced within the frame corner. As part of this, full-scale frame corners subjected to negative bending moment were tested and analyzed using the nonlinear finite-element program DIANA. A concrete material model based on nonlinear fracture mechanics to take cracking into account and plasticity models for concrete in compression and reinforcement steel were used. An interface model accounted for the bond-slip relation between reinforcement and surrounding concrete. Parameters that varied in the study were reinforcement detailing, reinforcement ratio, the effects of the weakness of the construction joint, and the interaction between reinforcement and concrete. Tests and finite-element analyses support the idea that the new reinforcement detailing is appropriate to use. Furthermore, it was found that the effect on the maximum load capacity of different bond-slip relations, the weakness of the construction joint, and incorrect positioning of the reinforcement bars in the corner were negligible.
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References
1.
Abdul-Wahab, H. M. S., and Al-Roubai, A. A. M. (1998). “Strength and behaviour of steel fibre reinforced concrete corners under opening bending moment.” Mag. of Concrete Res., 50(4), 305–318.
2.
Balint, P. S., and Taylor, H. P. J. (1972). “Reinforcement detailing of frame corner joints with particular reference to opening corners.” Tech. Rep. 42.462, Cement and Concrete Association, London.
3.
Bathe, K. J. (1996). Finite element procedures. Prentice-Hall, Englewood Cliffs, N.J.
4.
CEB-FIP model code 1990, design code. (1993). Thomas Telford, Lausanne, Switzerland.
5.
DIANA, version 6.1 (1996). Dept. of Engrg. Mech. and Information Technol., TNO Building and Construction Research, Delft, The Netherlands.
6.
Engström, B. ( 1992). “Ductility of tie connections in precast structures,” PhD thesis, Div. of Concrete Struct., Chalmers University of Technology, Göteborg, Sweden.
7.
Gylltoft, K. ( 1983). “Fracture mechanics models for fatigue in concrete structures,” PhD thesis, Div. of Struct. Engrg., Luleåa University of Technology, Luleåa, Sweden.
8.
Hillerborg, A., Modéer, M., and Petersson, P.-E. (1976). “Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements.” Cement and Concrete Res., 6(6), 773–782.
9.
Hughes, T. J. R. (1987). The finite element method—Linear static and dynamic finite element analyses. Prentice-Hall, Englewood Cliffs, N.J.
10.
Johansson, M. ( 1996). “New reinforcement detailing in concrete frame corners of civil defence shelters: Non-linear finite element analyses and experiments,” Licentiate thesis, Div. of Concrete Struct., Chalmers University of Technology, Göteborg, Sweden.
11.
Johansson, M., and Karlsson, S. (1997). “New reinforcement detailing in concrete frame corners subjected to positive moment.” Rep. 97:5, Div. of Concrete Struct., Chalmers University of Technology, Göteborg, Sweden (in Swedish).
12.
Luo, Y. H., Durrani, A. J., Bai, S., and Yuan, J. (1994). “Study of reinforcing detail of tension bars in frame corner connections.” ACI Struct. J., 91(4), 486–496.
13.
Mayfield, B., Kong, F. K., and Bennison, A., and Davies, J. C. D. T. (1971). “Corner joint details in structural lightweight concrete.” ACI J., 68(5), 366–372.
14.
Mayfield, B., Kong, F. K., and Bennison, A. (1972). “Strength and stiffness of lightweight concrete corners.” ACI J., 69(7), 420–427.
15.
Nilsson, I. H. E. ( 1973). “Reinforced concrete corners and joints subjected to bending moment.” Document D7:1973, National Swedish Institute for Building Research, Stockholm, Sweden.
16.
Plos, M. ( 1995). “Application of fracture mechanics to concrete bridges—Finite element analyses and experiments,” PhD thesis, Div. of Concrete Struct., Chalmers University of Technology, Göteborg, Sweden.
17.
Plos, M., and Gylltoft, K. (1998). “Nonlinear FE analyses of RC bridge frame corners, based on fracture mechanics.”J. Bridge Engrg., ASCE, 3(4), 204–210.
18.
RILEM 50-FMC Committee. (1985). “Determination of the fracture energy of mortar and concrete by means of three-point bend tests on notched beams.” Mat. and Struct., 18(106), 285–290.
19.
Shelter regulations, SR. (1994). English Ed., Publ. B54-168/94, Swedish Rescue Services Agency, Karlstad, Sweden.
20.
Skettrup, E., Strabo, J., Andersen, N. H., and Brondum-Nielsen, T. (1984). “Concrete frame corners.” ACI J., 81(6), 587–593.
21.
Stroband, J., and Kolpa, J. J. ( 1983). “The behaviour of reinforced concrete column-to-beam joints, Part 1, Corners subjected to negative moments.” Rep. 5-83-9, Stevin Lab., Delft University of Technology, Delft, The Netherlands.
22.
Swann, R. A. (1969). “Flexural strength of corners of reinforced concrete portal frames.” Tech. Rep. TRA 434, Cement and Concrete Association, London.
23.
van Mier, J. G. M. ( 1984). “Strain softening of concrete under multiaxial loading conditions,” PhD thesis, Eindhoven University of Technology, Eindhoven, The Netherlands.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 126 • Issue 2 • February 2000
Pages: 190 - 199
History
Received: Apr 7, 1998
Published online: Feb 1, 2000
Published in print: Feb 2000
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