Computer Analysis and Design of Concrete Beams and Grids
Publication: Journal of Structural Engineering
Volume 114, Issue 12
Abstract
Once the sizes of the cross sections of members of continuous beams or grids are assumed, it is possible to perform by computer—for any loading—the structural analysis and the design checks for serviceability and ultimate strength. A computer program that performs these tasks is described. The program is particularly suitable for bridge design. With the prestressing jacking force and cable profiles specified as data, the loss due to friction and anchorage set is automatically calculated. The effects of creep and shrinkage of concrete and relaxation of prestressed steel are accounted for from the requirements of equilibrium and compatibility of strain in concrete and steel. The instantaneous and time‐dependent displacements, the stresses, and crack width when cracking occurs are calculated. The output also includes the cross‐sectional areas of the longitudinal non‐prestressed reinforcement and the number of stirrups necessary to resist the factored bending and twisting moments and shearing forces. For segmental construction or other multi‐stage construction methods, the program gives the stresses and deformations in each construction stage and after a long period. The reinforced concrete structures considered can have any amount of prestressing, varying from zero (allowing cracking), to full prestressing (eliminating cracks).
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References
1.
ACI Committee 209 (1982). “Prediction of creep, shrinkage and temperature effects in oncrete structures.” ACI Publication SP‐76, Amer. Concrete Inst., Detroit, Mich., 193–300.
2.
ACI Committee 318. (1986). “Building code requirements for reinforced concrete (ACI 318‐83).” Amer. Concrete Inst., Detroit, Mich.
3.
Bachman, H. (1984). “Design of partially prestressed concrete structures based on Swiss experience.” PCI Journal, 29(4), 84–105.
4.
Bazant, Z. P., and Kim, S. S. (1979). “Approximate relaxation function for concrete.” J. Struct. Div., ASCE, 105(ST12), 2695–2705.
5.
Brondum‐Nielsen, T. (1986). “Ultimate flexural capacity of fully prestressed, partially prestressed, and nonprestressed arbitrary concrete sections under symmetric bending.” ACI Journal, 83, Jan.–Feb., 29–35.
6.
CEB‐FIP model code for concrete structures. (1978). Comité Euro‐Internationale du Béton—Féderation Internationale de la Precontrainte, Paris, France.
7.
Collins, M. P., and Mitchel, D. (1987). Prestressed concrete basics. Canadian Prestressed Concrete Inst., Ottawa, Canada.
8.
Design of concrete structures for buildings. CSA Standard CAN3‐A23.3‐M84, Canadian Standards Assoc., Ontario, Canada.
9.
Design of highway bridges. CSA Standard CAN3‐S6‐M78, Canadian Standards Assoc., Ontario, Canada.
10.
Ghali, A., and Favre, R. (1986). Concrete structures: Stresses and deformations. Chapman and Hall, New York, N.Y.
11.
Ghali, A., and Tadros, M. K. (1985). “Partially prestressed concrete structures.” Struct. Engrg., ASCE, 111(8), 1846–1865.
12.
Ghali, A., and Trevino, J. (1985). “Relaxation of steel in prestressed concrete.” PCI Journal, 30(5), 82–94.
13.
Magura, D. D., Sozen, M. A., and Seiss, C. P. (1964). “A study of stress relaxation in prestressing reinforcement.” PCI Journal, 9(2), 13–57.
14.
Mattock, A. H. (1979). “Flexural strength of prestressed concrete sections by programmable calculator.” PCI Journal, 24(1), 32–54.
15.
Mokhtar, A. A., and Ghali, A. (1987). User's manual and computer program ADCGRID: Analysis and design of concrete grids. Research Report No. 87‐1, Dept. of Civ. Engrg., Univ. of Calgary, Canada.
16.
Mokhtar, A. A. (1987). “Computer‐aided design of continuous beams and grids and application to bridges.” Thesis presented to the University of Calgary in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Calgary, Alberta, Canada.
17.
Naaman, A. E. (1977). “Ultimate analysis of prestressed and partially prestressed sections by strain compatibility.” PCI Journal, 22(1), 32–51.
18.
Naaman, A. E. (1982). Prestressed concrete analysis and design. McGraw‐Hill Book Company, New York, N.Y.
19.
Ontario highway bridge design code. (1983). Second Ed., Ministry of Transportation and Communications, Ontario, Canada.
20.
PCI Committee on Prestress Losses. (1975). “Recommendations for estimating prestress losses.” PCI Journal, Vol. 20, No. 4, July–Aug., pp. 43–75.
21.
Standard specifications for highway bridges. (1983). Amer. Assn. of State Highway and Transp. Officials, 13th Ed., Washington, D.C.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 114 • Issue 12 • December 1988
Pages: 2669 - 2691
Copyright
Copyright © 1988 ASCE.
History
Published online: Dec 1, 1988
Published in print: Dec 1988
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