An Experimental Study of Monolithic & Hybrid Fiber Reinforced Polymer for Strengthening Reinforced Concrete Beams in Bending

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2017 by IJETT Journal
Volume-47 Number-5
Year of Publication : 2017
Authors : V.Shakila, Mr.K.Soundhirarajan
  10.14445/22315381/IJETT-V47P249

MLA 

V.Shakila, Mr.K.Soundhirarajan "An Experimental Study of Monolithic & Hybrid Fiber Reinforced Polymer for Strengthening Reinforced Concrete Beams in Bending", International Journal of Engineering Trends and Technology (IJETT), V47(5),303-313 May 2017. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract
Due to the increasing deterioration of reinforced concrete heritage structures, the repair and strengthening industry has become a very hot business in most parts of the world. There are also various methods to prolong the service life of these deteriorated structures varying in their effectiveness and initial cost. There are also various repair principles from organizations, which are sometimes difficult to attain in the real world. These principles have a wide range of influence on reinforced concrete heritage structures which should pass from generation to generation. To select an effective repair method for a deficient concrete member or structure, the effect or damage of the cause should be studied deeply using field and laboratory investigation techniques. If the cause of the damage is known, an appropriate strengthening technique can be selected. Mostly the damages are expressed in terms of cracks of a member or structure. To meet up the requirements of advance infrastructure, new innovative materials/ technologies in Civil engineering industry has started to make its way. Any technology or material has its limitations and to meet the new requirements new technologies have to be invented and used. With structures becoming old and the increasing bar for the constructed buildings the old buildings have started to show a serious need of additional retrofits to increase their durability and life. The aim of this project work is use of FRP for confinement has proved effective in retrofitting and strengthening applications. The Confinement in seismically active regions has proven to be one of the early applications of FRP materials in infrastructure applications. Confinement may be beneficial in nonseismic zones too, where, for instance, survivability of explosive attacks is required or the axial load capacity of a column must be increased due to higher vertical loads, e.g. if new storey’s have to be added to an existing building or if an existing bridge deck has to be widened. In any case, confinement with FRP may be provided by wrapping RC columns with prefabricated jackets or in situ cured sheets, in which the principal fiber direction is circumferential. Beams, Plates and columns may be strengthened in flexure through the use of FRP composites bonded to their tension zone using epoxy as a common adhesive for this purpose. The direction of fibers is parallel to that of high tensile stresses. Both prefabricated FRP strips, as well as sheets (wet-layup) are applied. Hence, FRP composites are finding ways to prove effective and economical at the same time.

 References

1) Ahmed Ghobarah, A.Said (2002) ―Shear strengthening of beam-column Joints, Engineering Structures 24 (2002) pp. 881–888.
2) Angelo Leonardi, Alberto Meda and Zila Rinaldi (2009) “Fire Damaged R.C. Elements Repaired With High performance Fiber Reinforced Concrete Jacket, Paper Ref: S2002_A0385 3rd International Conference on Integrity, Reliability and Failure, Porto/Portugal.
3) Bimal Babu Adhikary, Hiroshi Mutsuyoshi (2006) ―Shear strengthening of RC beams with web-bonded continuous steel plates‖, Construction and Building Materials 20 pp.296– 307.
4) Constantin E. Chalioris (2008) ―Torsional strengthening of rectangular and flanged beam using carbon fibrereinforced- polymers – Experimental study Construction and Building Materials 22 (2008) 21–29.
5) Ehsan Ahmed (2011) Flexural performance of CFRP strengthened RC beams with different degrees of strengthening schemes. International Journal of the Physical Sciences Vol. 6(9), pp. 2229-223
6) Firas Al-Mahmoud , Arnaud Castel , Raoul François , Christian Tourneur c (2009) ―Strengthening of RC members with near-surface mounted CFRP rods Composite Structures 91 pp.138–147.
7) Giovanni Martinola, Alberto Meda, Giovanni A. Plizzari , Zila Rinaldi (2010)‖Strengthening and repair of RC beams with fiber reinforced concrete‖ Cement & Concrete Composites 32pp. 731–739.
8) Ines G. Costa, Joaquim A.O. Barros (2010) Flexural and shear strengthening of RC beams with composite materials – The influence of cutting steel stirrups to install CFRP strips Cement & Concrete Composites 32 pp.544–553.
9) Murat Engindeniz et.al (2008) ―Repair and Strengthening of Reinforced Concrete Beam-Column Joints: State of the Art ACI Structural Journal .Title no. 102-S18.
10) N. Pannirselvam, V. Nagaradjane and K. Chandramouli ( 2009) ― Strength Behaviour Of Fibre Reinforced Polymer Strengthened Beam‖ Journal of engineering and Applied Sciences. vol. 4, no. 9 pp.34-39.
11) Tara Sen, H. N. Jagannatha Reddy (2011) ―Application of Sisal, Bamboo, Coir and JuteNatural Composites in Structural Upgradation International Journal of Innovation,Management and Technology, Vol. 2, No. 3,pp- 186-199.

Keywords
Monolithic Fibre Reinforced Polymers, Hybrid Polymer,specimen test, strengthening test.