Energy Absorption Evaluation of CFRP-Strengthened Two-Spans Reinforced Concrete Beams under Pure Torsion

Ammar N. Hanoon, Ali A. Abdulhameed, Haider A. Abdulhameed, Saad K. Mohaisen

Abstract


For more than a decade, externally bonded carbon fiber reinforced polymer (CFRP) composites successfully utilized in retrofitting reinforced concrete structural elements. The function of CFRP reinforcement in increasing the ductility of reinforced concrete (RC) beam is essential in such members. Flexural and shear behaviors, ductility, and confinement were the main studied properties that used the CFRP as a strengthening material. However, limited attention has been paid to investigate the energy absorption of torsion strengthening of concrete members, especially two-span concrete beams. Hence, the target of this work is to investigate the effectiveness of CFRP-strengthening technique with regard to energy absorption of two-span RC beams subjected to pure torsion. The experimental program comprises the investigation of two groups; the first group comprises eight un-strengthened beam specimens, while the second group consists of eight strengthened beam specimens tested under torsional forces. The energy absorption capacity measured from the area under the curve of torque-angle of twist for tested beams. Two parameters were studied, the influence of concrete compressive strength and the angle of a twist. Experimental results indicated that all beams wrapped with CFRP sheet display superior torsional energy absorption capacity compared to the control specimens. The energy absorption may consider as a safety index for the torsional capacity of two-span RC beams under service loadings. Therefore, it is possible to avoid structural as well as material damages by understanding the concept of energy absorption that is one of the important experimental findings presented in this study.


Keywords


Two-span Beams; Reinforced Concrete; Torsional Strengthening; CFRP Fabrics; Energy Absorption; Ductility.

References


Al-Bayati, Ghaidak, Riadh Al-Mahaidi, M. Javad Hashemi, and Robin Kalfat. "Torsional strengthening of RC beams using NSM CFRP rope and innovative adhesives." Composite Structures 187 (2018): 190-202.

Matamoros, A., and Kuok-Hong, “Design of Simply Supported Deep Beams Using Strut-and-Tie Models.” ACI Structural Journal 100, no. 6 (November-December 2003):704–712. doi:10.14359/12836.

Hanoon, Ammar N., M. S. Jaafar, Farzad Hejazi, and Farah N.A. Abdul Aziz. “Energy Absorption Evaluation of Reinforced Concrete Beams Under Various Loading Rates Based on Particle Swarm Optimization Technique.” Engineering Optimization 49, no. 9 (December 2016): 1483–1501. doi:10.1080/0305215x.2016.1256729.

Chaboki, Hamid Reza, Mansour Ghalehnovi, Arash Karimipour, and Jorge de Brito. “Experimental Study on the Flexural Behaviour and Ductility Ratio of Steel Fibres Coarse Recycled Aggregate Concrete Beams.” Construction and Building Materials 186 (October 2018): 400–422. doi:10.1016/j.conbuildmat.2018.07.132.

Nielsen, Mogens P., and Linh, Hoang C. “The Theory of Plasticity.” Limit Analysis and Concrete Plasticity, Third Edition (December 15, 2010): 1–15. doi:10.1201/b10432-2.

Godat, Ahmed, Z. Qu, X. Z. Lu, Pierre Labossiere, L. P. Ye, and Kenneth W. Neale. “Size Effects for Reinforced Concrete Beams Strengthened in Shear with CFRP Strips.” Journal of Composites for Construction 14, no. 3 (June 2010): 260–271. doi:10.1061/(asce)cc.1943-5614.0000072.

Talbot, Arthur N. 1909. “Tests of Reinforced Concrete Beams: Resistance to Web Stresses.” University of Illinois. Engineering Experiment Station. Bulletin; no. 29.

Abdulhameed, Haider A., Hani Nassif, and Kamal H. Khayat. “Use of Fiber-Reinforced Self-Consolidating Concrete to Enhance Serviceability Performance of Damaged Beams.” Transportation Research Record: Journal of the Transportation Research Board 2672, no. 27 (July 28, 2018): 45–55. doi:10.1177/0361198118787983.

Lee, Jong-Han, Baiksoon Cho, and Eunsoo Choi. “Flexural Capacity of Fiber Reinforced Concrete with a Consideration of Concrete Strength and Fiber Content.” Construction and Building Materials 138 (May 2017): 222–231. doi:10.1016/j.conbuildmat.2017.01.096.

Salom, Pedro R., Janos Gergely, and David T. Young. “Torsional Retrofit of Spandrel Beams with Composite Laminates.” J. Compos. Constr. 157, no. 1 (January 2004): 69–76. doi:10.1680/stbu.157.1.69.36411.

Hii, Adrian K. Y., and Al-Mahaidi, Riadh. “Experimental Investigation on Torsional Behavior of Solid and Box-Section RC Beams Strengthened with CFRP Using Photogrammetry.” Journal of Composites for Construction 10, no. 4 (August 2006): 321–329. doi:10.1061/(asce)1090-0268(2006)10:4(321).

Hanoon, Ammar N., M.S. Jaafar, Al Zaidee, Salah R. , Hejazi, Farzad, and Abd Aziz, F.N.A. “Effectiveness Factor of the Strut-and-Tie Model for Reinforced Concrete Deep Beams Strengthened with CFRP Sheet.” Journal of Building Engineering 12 (July 2017): 8–16. doi:10.1016/j.jobe.2017.05.001.

Chen, Cheng, Xiaowei Wang, Lili Sui, Feng Xing, Xilong Chen, and Yingwu Zhou. "Influence of FRP thickness and confining effect on flexural performance of HB-strengthened RC beams." Composites Part B: Engineering 161 (2019): 55-67.

Hanoon, Ammar N., Al Zaidee, Salah R., Banyhussan, Qais S., and Abdulhameed, Ali A.. “Modified Strut Effectiveness Factor for FRP-Reinforced Concrete Deep Beams.” International Journal of Engineering & Technology 7, no. 4.20 (November 28, 2018): 485–490. doi:10.14419/ijet.v7i4.20.26248.

Abdulhameed, Ali A., and AbdulMuttalib I. Said. “Experimental Investigation of the Behavior of Self-Form Segmental Concrete Masonry Arches.” Fibers 7, no. 7 (July 2, 2019): 58. doi:10.3390/fib7070058.

Mohaisen S.K., Abdulhameed Ali A., Kharnoob M.M. Behavior of Reinforced Concrete Continuous Beams under Pure Torsion. Journal of Engineering 22, no.12 (December 2016): 1–15.

Jing, Meng, Werasak Raongjant, and Zhongxian Li. “Torsional Strengthening of Reinforced Concrete Box Beams Using Carbon Fiber Reinforced Polymer.” Composite Structures 78, no. 2 (April 2007): 264–270. doi:10.1016/j.compstruct.2005.10.017.

Santhakumar, R., Chandrasekharan, E. “Behaviour of retrofitted reinforced concrete beams under combined bending and torsion: a numerical study.” Electronic Journal of Structural Engineering 7, (2007): 1–7.

Deifalla, A., and A. Ghobarah. “Full Torsional Behavior of RC Beams Wrapped with FRP: Analytical Model.” Journal of Composites for Construction 14, no. 3 (June 2010): 289–300. doi:10.1061/(asce)cc.1943-5614.0000085.

Salom, Pedro R., Janos Gergely, and David T. Young. “Torsional Strengthening of Spandrel Beams with Fiber-Reinforced Polymer Laminates.” Journal of Composites for Construction 8, no. 2 (April 2004): 157–162. doi:10.1061/(asce)1090-0268(2004)8:2(157).

Ameli, Mehran, and Hamid, R Ronagh. “Analytical Method for Evaluating Ultimate Torque of FRP Strengthened Reinforced Concrete Beams.” Journal of Composites for Construction 11, no. 4 (August 2007): 384–390. doi:10.1061/(asce)1090-0268(2007)11:4(384).

Chalioris, Constantin E. “Torsional Strengthening of Rectangular and Flanged Beams Using Carbon Fibre-Reinforced-Polymers–Experimental Study.” Construction and Building Materials 22, no. 1 (January 2008): 21–29. doi:10.1016/j.conbuildmat.2006.09.003.

Deifalla, A., and A. Ghobarah. “Strengthening RC T-Beams Subjected to Combined Torsion and Shear Using FRP Fabrics: Experimental Study.” Journal of Composites for Construction 14, no. 3 (June 2010): 301–311. doi:10.1061/(asce)cc.1943-5614.0000091.

Ghobarah, A., M. N. Ghorbel, and S. E. Chidiac. “Upgrading Torsional Resistance of Reinforced Concrete Beams Using Fiber-Reinforced Polymer.” Journal of Composites for Construction 6, no. 4 (November 2002): 257–263. doi:10.1061/(asce)1090-0268(2002)6:4(257).

Panchacharam, S. and Belarbi, A. “Torsional Behavior of Reinforced Concrete Beams Strengthened with FRP Composites,” First FIB Congress, Osaka, Japan, October 13-19,2002

Chalioris, Constantin E. “Torsional Strengthening of Rectangular and Flanged Beams Using Carbon Fibre – Reinforced –Polymers–Experimental Study.” Construction and Building Materials 22, no. 1 (January 2008): 21–29. doi:10.1016/j.conbuildmat.2006.09.003.

“Characterization and Failure Analysis of Plastics.” Choice Reviews Online 41, no. 09 (May 1, 2004): 41–5324–41–5324. doi:10.5860/choice.41-5324.


Full Text: PDF

DOI: 10.28991/cej-2019-03091389

Refbacks

  • There are currently no refbacks.




Copyright (c) 2019 Ali A. Abdulhameed, Ammar Hanoon, Haider A. Abdulhameed, Saad Mohaisen

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
x
Message