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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 30233


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10009881
FEM Study of Different Methods of Fiber Reinforcement Polymer Strengthening of a High Strength Concrete Beam-Column Connection
Abstract:
In reinforced concrete (RC) structures, beam-column connection region has a considerable effect on the behavior of structures. Using fiber reinforcement polymer (FRP) for the strengthening of connections in RC structures can be one of the solutions to retrofitting this zone which result in the enhanced behavior of structure. In this paper, these changes in behavior by using FRP for high strength concrete beam-column connection have been studied by finite element modeling. The concrete damage plasticity (CDP) model has been used to analyze the RC. The results illustrated a considerable development in load-bearing capacity but also a noticeable reduction in ductility. The study also assesses these qualities for several modes of strengthening and suggests the most effective mode of strengthening. Using FRP in flexural zone and FRP with 45-degree oriented fibers in shear zone of joint showed the most significant change in behavior.
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References:

[1] Antonopoulos, C. P. and Triantafillou, T. C., “Experimental Investigation of FRP-Strengthened RC Beam- Column Joints,” Journal of Composites for Construction 7(1), 39–49, 2003.
[2] Jaehong Kim, James M. LaFave., “Key influence parameters for the joint shear behavior of reinforced concrete (RC) beam–column connections,” Engineering Structures 29 2523– 2539, 2006.
[3] Parvin, A. and Granata, P., Investigation on the effects of fiber composites at concrete joints, Composites: Part B, No. 31, 499-509, 2000.
[4] Parvin, A. Altay, S. Yelcin, C. Kaya, O., “CFRP Rehabilitation Frame Joints with Inadequate Sear and Anchorage Details”, Journal of Composites for Construction, V. 14, N. 1, January, 2010
[5] CEB-FIP, “Model Code 2010”, CEB-FIP 2010.
[6] Taranu, N., “Polymeric composites in Construction”, (Course Notes). The University of Sheffield Printing Office, 2008.
[7] ACI 440.2R-08, “Guide for the Design and Construction of Externally Bonded FRP systems for Strengthening Concrete Structures,” ACI Committee 440, American Concrete Institute, 2008.
[8] ASTM A615/A615M-16, "Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement," ASTM International, 2016.
[9] Chen, J. F., “Finite Element Modeling of Frp-to-Concrete Bond Behaviour, Using the Concrete Damage Plasticity”, 5th International Conference on FRP in Civil Engineering, CICE, Beijing, China, 2010.
[10] FHWA, “Finite Element Analysis of High Strength Concrete”, Federal Highway Administration, 2010.
[11] ABAQUS, “Abaqus analysis users’s manual,” version 6.13, Dassault systemes, 2013.
[12] Barros. J. A. O., Fortes. A.S., “Flexural strengthening of concrete beam with CFRP laminates bonded into slites,” Cement and concrete composites, N. 27, 2015, pp. 471-480.
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