Flexural Behavior of Steel Fiber Reinforced Concrete
Publication: Journal of Materials in Civil Engineering
Volume 10, Issue 2
Abstract
A constitutive model for steel fiber reinforced (SFR) concrete is proposed, in which the tensile behavior incorporates a bilinear strain softening feature. Composite material properties (fcu, ft), fiber volume concentration (Vf), fiber aspect ratio (L/d), and fiber-concrete matrix bond stress (τd) are used to define the model. The model may also exhibit strain hardening characteristic depending on the magnitude of the variables. Based on the constitutive model, the full history of the flexural moment-curvature relationship for SFR concrete is calculated. Predicted curves are superimposed onto and compared with published experimental data. The results show good overall agreement; the post-cracking softening and post-cracking strengthening response were predicted. In order to facilitate the rapid assessment of the ultimate flexural behavior of SFR concrete, a secondary tensile model is derived from the proposed model. A strain softening parameter (α) is defined for the secondary model and used to evaluate the performance and efficiency of steel fiber reinforcement. The predictive technique using this parameter can be applied to SFR concrete containing various concrete strengths, types of fibers, and fiber concentrations. Charts are presented to assist with fiber selection for flexural design of SFR concrete. Predictions based on the charts are compared with published experimental data.
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References
1.
Chuang, T., and Mai, Y. (1987). “Behavior of strain softening materials in flexural bending.”SP105, American Concrete Institute, Detroit, Mich., 85–100.
2.
Clarke, R., and Sharma, A. (1987). “Flexural behavior of fibro-ferrocrete one-way slabs.”SP105, American Concrete Institute, Detroit, Mich., 493–516.
3.
Craig, R. J., Decker, J., Dombrowski, L. Jr., Laurencelle, R., and Federovich, J.(1987). “Inelastic behavior of reinforced fibrous concrete.”J. Struct. Engrg., ASCE, 113(4), 802–817.
4.
“Design considerations for steel fiber reinforced concrete.” (1988). American Concrete Institute, ACI Committee 544, ACI 544.4R, ACI Struct. J., 85(5), 563–580.
5.
Dwarakanath, H. V., and Nagaraj, T. S.(1991). “Comparative study of predictions of flexural strength of steel fiber concrete.”ACI Struct. J., 88(6), 714–720.
6.
Ghalib, M. A.(1980). “Moment capacity of steel fiber reinforced small concrete slabs.”ACI J., 77(4), 247–257.
7.
Hannant, D. J. (1978). Fiber cements and fiber concretes. John Wiley & Sons, Inc., New York, N.Y.
8.
Henagar, C. H. (1977). “Ultimate strength of reinforced steel fibrous concrete beams.”Fibre reinforced materials: design & engineering applications, Institution of Civil Engineers, London, U.K., 165–173.
9.
Johnston, C. D., and Gray, R. J. (1986). “Flexural toughness and first-crack strength of fiber reinforced concrete using ASTM Standard C1018.”RILEM Symp., FRC 86, 3rd Int. Symp. on Developments in Fibre Reinforced Cement and Concrete, R. N. Swamy, R. L. Wagstaffe, and D. R. Oakley, eds., University of Sheffield, U.K.
10.
Lim, T. Y., Paramasivam, P., and Lee, S. L.(1987a). “Analytical model for tensile behavior of steel-fiber concrete.”ACI Mat. J., 84(4), 286–298.
11.
Lim, T. Y., Paramasivam, P., and Lee, S. L.(1987b). “Bending behavior of steel-fiber concrete beams.”ACI Struct. J., 84(6), 524–536.
12.
“Measurement of properties of fiber reinforced concrete.” (1988). American Concrete Institute, ACI Committee 544, ACI 544.2R, ACI Mat. J., 85(6), 583–593.
13.
Pei, J. S. (1996). “Behaviour of steel fibre reinforced concrete slabs.” MEng thesis, Nanyang Technological University, Singapore.
14.
Sakai, M., and Nakamura, N. (1986). “Analysis of flexural behavior of steel fibre reinforced concrete.”RILEM Symp., FRC 86, 3rd Int. Symp. on Developments in Fibre Reinforced Cement and Concrete, R. N. Swamy, R. L. Wagstaffe, and D. R. Oakley, eds., University of Sheffield, U.K.
15.
Soroushian, P., and Bayasi, Z.(1991). “Fiber type effects on the performance of steel fiber reinforced concrete.”ACI Mat. J., 88(2), 129–134.
16.
Soroushian, P., and Lee, C. D. (1989). “Constitutive modeling of steel fiber reinforced concrete under direct tension and compression.”Fiber reinforced cements and concretes, R. N. Swamy and B. Barr, eds., Elsevier Applied Science, New York, N.Y., 363–377.
17.
The structural use of concrete: part 1. Design material and workmanship. (1985). British Standards Institute (BS 8110: Part 1: 1985), London, U.K.
18.
Swamy, R. N., and Al-Ta'an, S. A.(1981). “Deformation and ultimate strength in flexure of reinforced concrete beams made with steel fiber concrete.”ACI Struct. J., 78(5), 395–405.
19.
Swamy, R. N., Mangat, P. S., and Rao, C. V. S. K. (1974). “The mechanics of fiber reinforcement of cement matrices.”SP44, American Concrete Institute, Detroit, Mich., 1–28.
20.
Wörner, J. D., and Müller, M. (1994). “Procedure for the calculation of fiber reinforced concrete for moments and normal forces.”SP146, American Concrete Institute, Detroit, Mich., 139–156.
21.
Zhuang, Y. P., Jiang, J. J., Jing, S. Y., and Ye, Z. M. (1990). Basic element design for steel reinforced concrete structures. Earthquake Press, Beijing, China (in Chinese).
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Copyright © 1998 American Society of Civil Engineers.
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Published online: May 1, 1998
Published in print: May 1998
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