STRUCTURAL BEHAVIOR OF REACTIVE POWDER REINFORCED CONCRETE SHORT COLUMNS
DOI:
https://doi.org/10.30572/2018/KJE/130102Keywords:
Reactive Powder Concrete, Load Deflection, Steel Fiber Concrete, Silica fume, Steel reinforcement, Spacing between stirrupsAbstract
The experimental work of this research included the test of seven columns, with dimensions of 900mm length, and cross section (150*150), a series of tests were carried out on control specimens (cylinder and prisms) for each mix for the purpose of studying the mechanical properties of reactive powder concrete such as compressive strength, splitting tensile strength, modulus of rupture and modulus of elasticity. The experimental results showed the increasing in steel fibers ratio by 2% led to the increase in the compressive strength by 22.3% and increased splitting tensile strength by 329.7%, modulus of rupture by 234.44% and modulus of elasticity by 20.80%. The experimental results of the tests of slender columns indicated that increasing the steel fiber ratio from 0% led decreasing the ultimate load by 36.454 % compared to the control columns, to 2% led increasing the ultimate load by 21.685 % compared to the control columns. The results showed that of diameter steel reinforcement ratio of short columns from Ø10 led to decreasing the ultimate load by 1.859% compared to the control columns, to Ø16 led to increasing the ultimate load by 32.901% compared to the control columns. And the results showed that of spacing between of stirrups (200mm) led to decreasing the ultimate load by 4.778% compared to the control columns, to (100mm) led to increasing the ultimate load by 12.924% compared to the control columns. In the second part of this research, the ANSYS program was used as a numerical method to investigate the behavior of these columns using nonlinear analysis (Finite element). When comparing the results of experimental with theoretical side ,the theoretical results showed a good agreement with the experimental results where the maximum difference ratio in ultimate load was about 9.03 % for all the tested and analyzed columns.
Downloads
References
James K. W.,” Reinforced Concrete Mechanics and Design ", Ph.d Thesis, University of Michigan, 2011.
Jaafer, A. A.,” Behavior of Short Concrete Columns Strengthened with Ferrocement" Ph.D. Thesis, University of Basrah, 2012.
Campione, G., Colajanni, P., La Mendola, L., and Spinella, N., “Ductility of Reinforced Concrete Members Externally Wrapped with Fiber Reinforced Polymer Sheets”, Journal of Composites for Construction, Vol. 11, No .3, pp. 279-290, 2007.
Priyan Mendis (2003), “Design of high strength concrete members: State-of- the-art”. Published by John Wiley & Sons, Inc.
Frangou M., Pilakoutas K. and Dritsos S. (1995), “Structural repair/strengthening of RC columns”, Journal of Construction & Building Materials, Vol. 9, No. 5, pp. 259-266.
Rahai A.R. and Alinia M.M. (2008), “Performance evaluation and strengthening of concrete structures with composite bracing members”, Journal of Construction & Building Materials, Vol. 22, No. 10, pp. 2100- 2110.
Yang, I.H., Joh, C., and Kim, B.S., “Structural Behavior of Ultra High- Performance Concrete Beams Subjected to Bending”, Engineering Structures, Vol. 32, 2010, pp.3478-3487.
Hannawayya, S.P., "Behavior of Reactive Powder Concrete Beams in Bending", Ph.D. Thesis University of Technology, Baghdad, October 2010, pp.239.
Adheem, A.H, . “Structural Behavior of Reactive Powder concrete member under Repeated loads”. Ph.D. Thesis, Babylon University, 2016,pp.202
Germain O. and Espion B. (2005), “Slender High-Strength RC Columns under Eccentric Compression”, Magazine of Concrete Research, Vol. 57, No. 6, pp. 361- 370.
Majewski T., Bobinski J., and Tejchman J., (2008) “FE Analysis of Failure Behaviour of Reinforced Concrete Columns under Eccentric Compression”, Journal of Structural Engineering, Vol. 30, No. 2, pp.300-317.
Leite L., Bonet J.L., Pallarés L., Pedro F. Miguel and Miguel A. Fernández- Prada (2013), “Experimental Research on High Strength Concrete Slender Columns Subjected to Compression and Uniaxial Bending with Unequal Eccentricities at the Ends”, Journal of Engineering Structures, Vol. 48, pp. 220-232
ACI-318, "Building Code Requirements For Reinforced Concrete and Commentary", American Concrete Institute, Farmington Hills,Mich,USA, 2019.
ASTM C39/C39M (2015) . “Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens” .USA: ASTM International ,pp.1 - 5.
Maroliya M. K., “A State Of Art- On Development Of Reactive Powder Concrete,” Int. J. Innov. Res. Dev., vol. 1, no. 8, pp. 493–503, 2012.
ASTM C496/C496M (2011) . “ Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens ”. USA: ASTM International, pp.1-5.
ASTM C78/C78M (2015). “Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading) ”.USA: ASTM International ,pp.1-4.
ASTM C469/C469M (2014) . “ Standard Test Method for Static Modulus of Elasticity and Poisson’s Ratio of Concrete in Compression”. USA: ASTM International,pp.1-5.
AL-Shimmari I, Kh. , Hamad N.T. and Waryosh W.A. ,2011 . Investigation of the Behavior for Reinforced Concrete Beam Using NonLinear Three - Dimensional Finite Elements Model. Engineering College, University of Al-Mustansiriya/Baghdad ,Eng. & Tech. Journal, 29(10), pp.1870-1885.
Downloads
Published
How to Cite
Issue
Section
Categories
License
Copyright (c) 2022 Ragheed F. Makki , Wafaa S. Naji
This work is licensed under a Creative Commons Attribution 4.0 International License.
