Review Analysis on RC-T Section Beam with Openings using BFRP Composites

IJSTE - International Journal of Science Technology & Engineering | Volume 3 | Issue 09 | March 2017 ISSN (online): 2349-784X

Review Analysis on RC-T Section Beam with Openings using BFRP Composites Nikhil V. Chaudhari ME Student Department of Civil Engineering ICOER, Wagholi, Pune, India

Prof. V. D. Girge Assistant Professor Department of Civil Engineering ICOER, Wagholi, Pune, India

Abstract In construction industry retrofitting is mainly used for repairing the old structures, but use of FRP is proving to be better than the conventional methods of retrofitting. This paper provides the literature review of the different authors who has studied on the FRP composites, beams, T beams, and beams with openings. The study provides good data on the FRP use, opening dimensions and different loading conditions to be applied on the beam.

Keywords: FRP, BFRP, T Beam, Openings, Shear Strength ________________________________________________________________________________________________________ I.

INTRODUCTION

Now a days, deterioration is the main issue faced by concrete industry. The complete replacement of the deficient structure is not possible therefore the FRP composite material is a new method of retrofitting the structure. BFRP composites have many advantages over conventional retrofitting techniques such as cost effectiveness and high strength.

Shear deficient beams are strengthened using the FRP composites. As T-section beam is the more popular shape in long span structures, the complete wrapping of FRP is not possible. The opening size in web is found to be not more than 50 percent of the web depth, anything greater than that will affect the shear capacity of the beam.

The shear strength of the beam is calculated using ASC guidelines and is found to be greater in the beam wrapped with BFRP sheet than the conventional.

II. LITERATURE REVIEW 1) V. Fiore, T.Scalici studied on the properties of Basalt fibre and its composites.

2) They found in their work that basalt is a ecofriendly material with good mechanical, chemical and thermal performance like other fibre they do not require additional additives. Addition of basalt fibre in concrete gives better compressive and flexural strengths.

3) C. Chen, Y. Li & M. C. Kuo worked on steel reinforced concrete beams with web openings 4) Research was carried out on different beams with different opening sizes and shapes. Beam without opening is subject to pure bending while the beams with different are subjected to combine failure of bending and shear. Only Rectangular opening specimen satisfied the equation while circular and square opening specimen did not satisfied the equation of bending and shear strength.

5) Tamer El Maaddawy, Sayed Sherif experimented on FRP composites for Shear strengthening of reinforced concrete beam with openings 6) They casted 13 beams with openings and tested under four-point bending. The opening were made in beams and wrapped with CFRP sheets. They found that strength gained by the CFRP sheets was in the range of 35-73percent. Openings were made at the top, mid, bottom of the shear span. The shear strength was maximum when opening was at the top while it was minimum the opening are near the bottom. They compared experimental and analytical results.

7) Ahmed Khalifa, Antonio Nanni experimented on improvement of shear capacity of existing T-beams using CRF composites.

8) They investigated the factors that affected shear strength like wrapping scheme and CFRP amount. The specimen were wrapped with CFRP sheets using different combination and tested. Results were stated that shear strength increased by 35145%. Major findings were that U shaped wrapping is more effective than side wrapping and no effect of excessive wrapping on beam.

9) I. Jankowiak compared experimental and FEM analysis of RC beams with CFRP strips 10) The beams are divided into different groups by properties of load applied before and after them. At different preloading states the effectiveness of strengthening was studied. The validation was given by FEM models and comparison between experimental and numerical analysis was done.

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Review Analysis on RC-T Section Beam with Openings using BFRP Composites (IJSTE/ Volume 3 / Issue 09 / 059)

III. CONCLUSION Mostly research and study has been done on CFRP composite material and BFRP is new in the industry therefore research should be carried out on the BFRP composite material. Openings in the beam can be given at certain dimensions without changing the strength. Also FRP composites have given us the data that the shear strength can be increased by applying the FRP sheets in different manner. Hence it is proposed to study the effect of BFRP composites on T beams with openings.

ACKNOWLEDGMENT I would like thanks of gratitude to my project guide Prof. V. D. Girge as well as our principal Dr. D. D. Shah who gave me the chance to do this review paper which helped me in doing a Research. During this period I came to know about so many different things I am really thankful to them.

Secondly i would like to thank my parents and friends who helped me a lot in finalizing this project within the limited time period.

REFERENCES [1] [2] [3] [4] [5] [6] [7] [8] [9]

V. Fiore, T.Scalici (Jan 2015) “A review on Basalt fibre and its composites” C. Chen, Y. Li & M. C. Kuo (Oct 2008) “Experimental study of steel reinforced concrete beams with web openings” Tamer El Maaddawy, Sayed Sherif (July 2008) “FRP composites for Shear strengthening of reinforced concrete beam with openings” Ahmed Khalifa, Antonio Nanni (Dec 1999) “Improving shear capacity of existing RC T-beams using CRF composites” I. Jankowiak (June 2012) “Analysis of RC beams strength by CFRP strips – Experiemental and FEA study” N. Attari, S. Amziane, M. Chemrouk (Sept 2012) “Flexural strengthening of concrete beams using CFRP , GFRP & hybrid FRP sheets” A.K.Panigrahi, K.C.Biswal, M.R.Barik (Feb 2014) “Strengthening of shear deficient RC-T beams with externally bonded GFRP sheets” Gyuseon Kim, Jongsung Sim, Hongseob Oh (April 2007) “Shear strength of strengthened RC beam with FRP in shear”[9] J.F.Chen, J.G.Tenj (2003) “hear capacity of fibre-reinforced polymer-strengthened reinforced concrete beams: Fibre Rienforced Polymer Rupture” A. Ahmed, M.M.Fayyadh, S. Naganathan, K. Nasharuddin (March 2012) “Reinforced concrete beams with web openings: A state of the art review”

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