Strength of Struts and Nodes in Strut-Tie Model
Publication: Journal of Structural Engineering
Volume 122, Issue 1
Abstract
General approaches for determining the effective stress levels of concrete struts and for verifying the bearing capacity of nodal zones in strut-tie models are proposed. The effective stress levels of concrete struts are determined by implementing the principal stress ratios of the finite elements (used in the finite-element nonlinear analysis of a two-dimensional plain concrete) corresponding to the strut regions of the strut-tie model. Based on the obtained geometry of the struts, nodal zones are developed and their bearing capacity is verified using a finite-element nonlinear analysis with a failure criteria that incorporates the different state of stresses. To illustrate the proposed approaches, an analysis of a reinforced concrete beam tested to failure is conducted using the strut-tie model approach with the aid of interactive computer graphics program NL-STAT.
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References
1.
Adebar, P., and Zhou, Z.(1993). “Bearing strength of compressive struts confined by plain concrete.”ACI Struct. J., 90(5), 534–541.
2.
Alshegeir, A. (1992). “Analysis and design of disturbed regions with strut-tie models,” PhD thesis, Purdue University, West Lafayette, Ind.
3.
Anderson, N. S., and Ramirez, J. A. (1987). “Effect of the detailing of stirrup reinforcement on the ultimate strength and behavior of reinforced concrete members failing in shear.”Struct. Engrg. Rep. No. CE-STR-87-2, Purdue University, West Lafayette, Ind.
4.
Bergmeister, K., Breen, J. E., and Jirsa, J. O. (1991). “Dimensioning of the nodes and development of reinforcement.”Rep., IABSE Colloquium Struct. Concrete, Stuttgart, Germany, 551–556.
5.
“Design of concrete structures for buildings.” (1984). CAN3-A23.3-M84, Canadian Standards Association, Rexdale, Ontario, Canada.
6.
Jirsa, J. O., Breen, J. E., Bergmeister, K., Barton, D., Anderson, R., and Bouadi, H. (1991). “Experimental studies of nodes in strut-and-tie models.”Rep., IABSE Colloquium Struct. Concrete, Stuttgart, Germany, 525–532.
7.
Kupfer, H., and Gerstle, K.(1973). “Behavior of concrete under biaxial stresses.”J. Engrg. Mech., ASCE, 99(4), 852–866.
8.
Kupfer, H., Hilsdorf, H. K., and Rusch, H.(1969). “Behavior of concrete under biaxial stresses.”ACI J., 66(8), 656–666.
9.
MacGregor, J. G. (1988). “Reinforced concrete mechanics and design. Prentice-Hall, Englewood Cliffs, N.J.
10.
Marti, P.(1985). “Basic tools of reinforced concrete beam design.”J. Am. Concrete Inst., 82(1), 46–56.
11.
Nielsen, M. P., Braestrup, M. W., Jensen, B. C., and Bach, F. (1978). “Concrete plasticity, beam shear–shear in joints–punching shear.”Spec. Publ., Danish Soc. for Struct. Sci. and Engrg., Tech. Univ. of Denmark, Lyngby.
12.
Ramirez, J. A., and Breen, J. E. (1983). “Proposed design procedure for shear and torsion in reinforced and prestressed concrete.”Res. Rep. 248-4F, Ctr. for Transp. Res., Univ. of Texas, Austin.
13.
Schlaich, M., and Anagnostou, G.(1990). “Stress fields for nodes of strut-and-tie models.”J. Struct. Engrg., ASCE, 116(1), 13–23.
14.
Schlaich, J., Schaefer, K., and Jennewein, M.(1987). “Towards a consistent design of structural concrete.”J. Prestressed Concrete Inst., 32(3), 4–150.
15.
Vecchio, F. J., and Collins, M. P. (1982). “The response of reinforced concrete to in-plane shear and normal stresses.”Publ. No. 82-03, Dept. of Civ. Engrg., Univ. of Toronto, Canada.
16.
Yun, Y. M. (1994). “Design and analysis of 2-D structural concrete with strut-tie model,” PhD thesis, Purdue University, West Lafayette, Ind.
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Copyright © 1996 American Society of Civil Engineers.
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Published online: Jan 1, 1996
Published in print: Jan 1996
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