Finite element analysis of steel fiber-reinforced concrete (SFRC): validation of experimental tensile capacity of dog-bone specimens
Tóm tắt
Finite element analyses are conducted to model the tensile capacity of steel fiber-reinforced concrete (SFRC). For this purpose dog-bone specimens are casted and tested under direct and uniaxial tension. Two types of aggregates (brick and stone) are used to cast the SFRC and plain concrete. The fiber volume ratio is maintained 1.5 %. Total 8 numbers of dog-bone specimens are made and tested in a 1000-kN capacity digital universal testing machine (UTM). The strain data are gathered employing digital image correlation technique from high-definition images and high-speed video clips. Then, the strain data are synthesized with the load data obtained from the load cell of the UTM. The tensile capacity enhancement is found 182–253 % compared to control specimen to brick SFRC and in case of stone SFRC the enhancement is 157–268 %. Fibers are found to enhance the tensile capacity as well as ductile properties of concrete that ensures to prevent sudden brittle failure. The dog-bone specimens are modeled in the ANSYS 10.0 finite element platform and analyzed to model the tensile capacity of brick and stone SFRC. The SOLID65 element is used to model the SFRC as well as plain concretes by optimizing the Poisson’s ratio, modulus of elasticity, tensile strength and stress–strain relationships and also failure pattern as well as failure locations. This research provides information of the tensile capacity enhancement of SFRC made of both brick and stone which will be helpful for the construction industry of Bangladesh to introduce this engineering material in earthquake design. Last of all, the finite element outputs are found to hold good agreement with the experimental tensile capacity which validates the FE modeling.
Tài liệu tham khảo
ANSYS (2005) ANSYS Structural Analysis Guide, Version 10.0, ANSYS, Inc., Canonsburg, Pennsylvania
Chao S, Naaman AE, Parra-Montesinos GJ (2009) Bond behavior of reinforcing bars in tensile strain-hardening fiber-reinforced cement composites, ACI Struct J 106(6):897–906
Dola JF, Islam MR, Khatun MS, Hussan M (2013) Investigation of the shear capacity of beams made of steel fiber reinforced concrete (SFRC), B.Sc. Engineering Thesis, Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka, April
Islam MM (2011) Interaction diagrams of square concrete columns confined with fiber reinforced polymer wraps, M.Sc. Engineering Thesis, Department of Civil Engineering, Bangladesh University of Engineering and Technology, Dhaka, August
Islam MM, Choudhury MSI, Abdulla M, Amin AFMS (2011) confinement effect of fiber reinforced polymer wraps in circular and square concrete columns, 4th Annual Paper Meet and 1st Civil Engineering Congress, Civil Engineering Division, Institution of Engineers, Bangladesh (IEB), 22–24 December, Dhaka (Awarded best paper)
Kachlakev DI, Miller T, Yim S, Chansawat K, Potisuk T (2001) Finite Element Modeling of Reinforced Concrete Structures Strengthened With FRP Laminates, California Polytechnic State University, San Luis Obispo, CA and Oregon State University, Corvallis, OR for Oregon Department of Transportation, May
Lee S, Cho J, Vecchio FJ (2011) Diverse embedment model for steel fiber-reinforced concrete in tension: model development, ACI materials Journal
Shah SP, Swartz SE, Ouyang C (1995) Fracture Mechanics of Concrete. John Willy & Sons Inc, New York
Uddin MK, Mustafiz AZ, Chowdhury MA, Mondal P (2013) Investigation of the Flexural Capacity of Beams made of Steel Fiber Reinforced Concrete (SFRC), B.Sc. Engineering Thesis, Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka, April
Willam KJ, Warnke ED (1975) Constitutive Model for the Triaxial Behavior of Concrete. In: Proceedings, International Association for Bridge and Structural Engineering, ISMES, Bergamo, Italy, vol 19, pp 1–30