Composite Beams with Partial Interaction under Sustained Loads
Publication: Journal of Structural Engineering
Volume 118, Issue 7
Abstract
The paper presents the derivation of a theoretical model for the time‐dependent response of simply supported steel‐concrete composite beams. The concrete is modeled on a computer using the age‐adjusted effective modulus method, and slip at the steel‐concrete interface is included. The theory is compared with test results reported elsewhere, and the agreement is shown to be good. The comparison is for deflections up to 250 days from loading, and for section strains that include interfacial slip. Slip strains are calculated in the time‐dependent domain using the computer model. It is shown that the slip strains are increased by the interaction of creep, shrinkage, and connector modulus, but their absolute values are still reasonably small at service loads. The computer model forms a basis for deriving design rules, and lends itself to extension to continuous composite beams and slabs. The analysis is presented in a form that may be applied to other models for predicting the time‐dependent response of the concrete.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Ansourian, P. (1977). “The stability of composite beams in negative bending.” 2nd Int. Coll. on Stability of Steel Structs., ECCS and IABSE, Liege, Belgium, 145–154.
2.
Ansourian, P., and Roderick, J. W. (1978). “Analysis of composite beams.” J. Struct. Div., ASCE, 104(10), 1631–1645.
3.
Bradford, M. A. (1986). “Local buckling analysis of composite beams.” Civ. Engrg. Trans., Inst. Engrs., Canberra, Australia, CE28(4), 312–317.
4.
Bradford, M. A. (1991). “Deflections of composite beams subjected to creep and shrinkage.” ACI Struct. J., 88(5), 610–615.
5.
Bradford, M. A., and Gilbert, R. I. (1989). “Nonlinear behaviour of composite beams at service loads.” The Struct. Engr., 67(14), 263–268.
6.
Bradford, M. A., and Gilbert, R. I. (1991a). “Experiments on composite beams at service loads.” Civ. Engrg. Trans., Inst. Engrgs., Canberra, Australia, CE33(4), 284–291.
7.
Bradford, M. A., and Gilbert, R. I. (1991b). “Time‐dependent behaviour of simply‐supported steel‐concrete composite beams.” Mag. of Concr. Res., 43(157), 265–274.
8.
Bradford, M. A., and Johnson, R. P. (1987). “Inelastic buckling of composite bridge girders near internal supports.” Proc., Instn. Civ. Engrs., London, England, Part 2, 83, 143–159.
9.
Gilbert, R. I. (1988). Time effects in composite structures. Elsevier Applied Science Publishers, New York, N.Y.
10.
Hornbeck, R. W. (1975). Numerical methods. Quantum Publishers Inc., New York, N.Y.
11.
Johnson, R. P. (1974). Composite structures of steel and concrete. Collins, London, England.
12.
Lawther, R., and Gilbert, R. I. (1990). “A rate of creep analysis of composite steel‐concrete cross‐sections.” The Struct. Engr., 68(11), 208–213.
13.
Patrick, M., and Bridge, R. Q. (1987). “Behavior of Australian composite slabs.” Proc. Engrg. Found. Conf. on Composite Constr., Henniker, N.H.
14.
Roll, F. (1971). “The effects of differential shrinkage and creep on a composite steel‐concrete structure.” ACI Special Pub. SP‐27, 8, 187–214.
15.
Rotter, J. M., and Ansourian, P. (1979). “Cross‐section behaviour and ductility in composite beams.” Proc., Instn. Civ. Engrs., London, England, Part 2, 67, 453–474.
Information & Authors
Information
Published In
Copyright
Copyright © 1992 ASCE.
History
Published online: Jul 1, 1992
Published in print: Jul 1992
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.