Time-Dependent Analysis of Prestressed Composite Beams
Publication: Journal of Structural Engineering
Volume 121, Issue 4
Abstract
The viscoelastic analysis of composite steel-concrete continuous beams, with prestressed slab and flexible shear connectors, is presented. Two prestressing systems, involving the application of prestressing forces before or after the connection of the concrete slab to the steel beam, are considered. The mathematical formulation of the problem involves internal compatibility equations between beam and slab and between slab and prestressing cables. Such conditions are formulated taking into account the integral-type creep law for the concrete slab. With the model proposed, some relevant examples were investigated and discussed. Partial longitudinal prestressing of the slab, performed using cable with length less than the whole structure, is also analyzed. Particular attention is paid to examining the “primary” and the “secondary” effects of the prestressing, and the shear force distribution at beam-slab interface. A parametric study is then performed by varying the stiffness of shear connectors and the combining time between slab and beam.
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References
1.
Anand, S. C., and Fennell, C. J. (1976). “Prestressed composite continuous bridge girder.”J. Struct. Div., Proc., ASCE, New York, N.Y., 311–315.
2.
Bazant, Z. P. (1970). “Numerical analysis of creep of an indeterminate composite beam.”J. Appl. Mech., Trans. ASME, Ser. E, Am. Soc. of Mech. Engrs., New York, N.Y., Vol. 37, 1161–1164.
3.
Bazant, Z. P.(1972). “Numerical determination of long-range stress history from strain history in concrete.”Mat. and Struct. (RILEM), 5(27), 135–141.
4.
Bazant, Z. P. (1975). “Theory of creep and shrinkage in concrete structures: A precise of recent developments.”Mechanics today 2, Pergamon Press, New York, N.Y.
5.
“CEB-FIP model code 1990.” (1988). C.E.B. Bullettin d'Information n. 190, C.E.B.-F.I.P. Comité Euro-International du Beton, Paris, France.
6.
Chiorino, M. A., Napoli P., Mola, F., and Koprna, M. (1984). “C.E.B. design manual on structural effects on time-dependent behaviour of concrete.”C.E.B. Bullettin d'Information n. 142/142bis, Georgi Publishing Co., Saint-Saphorin, Switzerland.
7.
Dezi, L.(1994). “Shrinkage effects in composite continuous beams with flexible connection.”J. Constr. Steel Res., 28(3), 295–320.
8.
Dezi, L., Menditto, G., and Tarantino, A. M.(1990). “Homogeneous structures subjected to successive structural system changes.”J. Engrg. Mech., ASCE, 116(8), 1723–1732.
9.
Dezi, L., and Tarantino, A. M.(1993a). “Creep in composite continuous beams. I: Theoretical treatment.”J. Struct. Engrg., ASCE, 119(7), 2095–2111.
10.
Dezi, L., and Tarantino, A. M.(1993b). “Creep in composite continuous beams. II: Parametric study.”J. Struct. Engrg., ASCE, 119(7), 2112–2133.
11.
Dilger, W. H. (1982). “Methods of structural creep analysis.”Creep and shrinkage in concrete structures, Z. P. Bazant and F. H. Wittmann, eds., John Wiley & Sons, Inc., London, U.K., 305–339.
12.
Kennedy, J. B., and Grace, N. F. (1982). “Prestressed decks in continuous composite bridges. J. Struct. Engrg., ASCE, 108(11), 2394–2410.
13.
Knowles, F. R. (1973). Composite steel and concrete construction . John Wiley & Sons, Inc., New York, N.Y., 83–88.
14.
Lazic, J. D., and Lazic, V. B.(1985). “Generalised age-adjusted effective modulus method for creep in composite beam structures.”Cement and Concrete Res., 15(1), 1–12.
15.
Mc Henry, D. (1943). “A new aspect of creep in concrete and its application to design.”Proc., Vol. 43, ASTM, Philadelphia, Pa., 1069–1086.
16.
Newmark, N. M., Siess, C. P., and Viest, I. M.(1951). “Tests and analysis of composite beams with incomplete interaction.”Proc., Soc. of Experimental Stress Anal., 9(1), 75–92.
17.
Oehlers, D. J.(1989). “Splitting induced by shear connectors in composite beams.”J. Struct. Engrg., ASCE, 115(2), 341–362.
18.
Oehlers, D. J., and Coughlan, C. G.(1986). “The shear stiffness of stud shear connectors in composite beams.”J. Constr. Steel Res., 6(4), 273–284.
19.
Oehlers, D. J., and Johnson, R. P. (1987). “The strength of stud shear connections in composite beams.”The Struct. Engr., London, England, 65B(2), 44–48.
20.
Soliman, M. H., and Kennedy, J. B.(1986). “Prestress losses in continuous composite bridges.”PCI J., 31(1), 84–105.
21.
Takenada, H., Kishida, H., and Nakai, H. (1986). “A study on new composite girder using prestressed precast concrete slab by PPCS Method.”Stahlbau, Berlin, Germany, No. 6, 165–174.
22.
Tarantino, A. M., and Dezi, L.(1992). “Creep effects in composite beams with flexible shear connectors.”J. Struct. Engrg., ASCE, 118(8), 2063–2081.
23.
Troitsky, M. S. (1990). Prestressed steel bridges, theory and design; Bridge series . Van Nostrand Reinhold Company, New York, N.Y.
24.
Wright, H. D.(1990). “The deformation of composite beams with discrete flexible connection.”J. Constr. Steel Res., 15(1/2), 49–64.
Information & Authors
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Published In
Journal of Structural Engineering
Volume 121 • Issue 4 • April 1995
Pages: 621 - 633
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Apr 1, 1995
Published in print: Apr 1995
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