Optimum Design of R.C. Columns Reinforced by FRP Using TLBO Algorithm

Document Type : Original Article

Authors

1 Department of Civil Engineering, Faculty of Engineering, University of Qom

2 Department of Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran

Abstract

Optimum economic design is one of the main goals of civil engineering. Today, reinforced concrete the columns reinforced fibers called FRP fibers. The fiber is available in three types of carbon, glass, and aramid. In this study, the teaching and learning metaheuristic algorithm used to determine the dimensions of the column and steel bars, as well as the number of FRP layers needed for reinforcement. Considering the limitations and constraint that are intended for design, the algorithm determines the dimensions of the concrete cross-section and the bars, and then examines the cross-sectional strength and, if required for reinforcement, a number of FRP layers to reinforce the cross-sectional will use. The cost function includes the cost of concrete, reinforcing, and the FRP, which has been introduced as a target function. Design criteria and design constraints are implemented and formulated in accordance with the ACI 440-08 and ACI 318-14. Therefore, the set of target functions and constraints are related to each other so that the lowest cost based on the objective function is achieved by establishing all constraints (acceptable design) at a point called the optimal design. According to the results, using the dimensions of the column and number of bars represented by the algorithm, CFRP use is more cost effective.

Keywords

References

[1]   Karbhari, V.M. and L. Zhao, (2000) "Use of composites for 21st century civil infrastructure." Computer methods in applied mechanics and engineering,. 185(2): p. 433-454.
[2]   Mirmiran, A., (1998), "Effect of column parameters on FRP-confined concrete." Journal of Composites for Construction,. 2(4): p. 175-185.
 [3] Lam, L. and J. Teng, (2003), "Design-oriented stress-strain model for FRP-confined concrete in rectangular columns." Journal of Reinforced Plastics and Composites,. 22(13): p. 1149-1186.
  [4] Toutanji, H., et al., (2009)., "Behavior of large-scale rectangular columns confined with FRP composites". Journal of Composites for Construction,. 14(1): p. 62-71.
 [5] Quiertant, M. and J.-L. Clement, (2011)., "Behavior of RC columns strengthened with different CFRP systems under eccentric loading." Construction and Building Materials,. 25(2): p. 452-460.
[6] Widiarsa, I.B.R. and M.N. Hadi, (2013)., "Performance of CFRP wrapped square reinforced concrete columns subjected to eccentric loading."  Procedia Engineering,. 54: p. 365-376.
[7] Kaveh, A., Hoseini Vaez, S.R., Hosseini, P. (2017), “Modified Dolphin Monitoring Operator for Weight Optimization of Frame Structures”, Periodica Polytechnica Civil Engineering, Online published: 25 April 2017, https://doi.org/10.3311/PPci.9691.
[8] American Concrete Institute. (2008). "Guide for the design and construction of externally bonded FRP systems for strengthening of concrete structure" (ACI 440.2R-08). Farmington Hill, Mich., USA.
[9] American Concrete Institute. (2014). "Building code requirements for structural concrete" (ACI 318-14) and commentary (ACI 318-14), Farmington Hills, Mich., USA.
[10] Lam, L. and J. Teng, (2003), "Design-Oriented Stress-Strain Model for FRP-Confined Concrete." Construction and Building Materials, 17(6-7): p. 471-489.
[11] Rao, R.V., Savsani, V.J., and Vakharia, D. P. (2011). "Teaching–learning-based optimization: a novel method for constrained mechanical design optimization problems". Computer-Aided Design, 43(3), 303-315.
 
Optimum Design of RC. Columns Reinforced by FRP Using TLBO Algorithm
 
اسامی نویسندگان به انگلیسی بیاید
 
 
 
 
Journal of Concrete Structures and Materials
Volume 2, Issue 2 - Serial Number 4
December 2017
Pages 54-75

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History

  • Receive Date: 28 July 2017
  • Revise Date: 06 October 2017
  • Accept Date: 23 April 2018

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