Strengthening of Reinforced Concrete Rectangular Columns by using FRP Sheets
P Urmila1, A S Kumar2, A L P Kumar3, N Haripavan4
1P.Urmila, Assistant Professor, Department of Civil Engineering, NRI Institute of Technology, India.
2A.S Kumar, Assistant Professor, Department of Civil Engineering, Aditya Engineering College, India.
3A.L.P Kumar, Design Engineer, PEBS Pennar, Hyderabad (Telangana), India.
4N.Haripavan, Assistant Professor, Department of Civil Engineering, Gudlavalleru Engineering College, India.
Manuscript received on 29 May 2019 | Revised Manuscript received on 11 June 2019 | Manuscript Published on 22 June 2019 | PP: 913-916 | Volume-8 Issue-3S, February 2019 | Retrieval Number: C11930283S19/19©BEIESP
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Abstract: Strengthening of columns is needed now a days because of various reasons. Upgrading existing strength of columns, rectifying inadequacies due to poor construction practices or due to degradation or due to environmental effects are may be some reasons. In the present study the strength behavior of RC short axially loaded columns(100x00x500) strengthened with FRP sheet strips and the effect of edge rounding (sharp edges are made round) on load carrying capacity are studied. The Column is wrapped with strips of different FRP sheets at different spacings of constant FRP sheet material area. Columns are reinforced with 4#10mm diameter steel bars. The columns are designatedas CC,SG83.33,SG50,SB83.33,SB50,SC83.33,SC50,RG83.33,RG50, RB83.33,RB50,RC83.33,RB50. Here CC column is of control column without FRP sheet sticked S stands for sharp edge columns. R stands for rounded edge columns .G,B and C stands for Glass, Basalt, Carbon FRP sheets respectively. Here numerical indicates the width of the FRP strips in mm. The percentage increase in the capacity (load) of FRP strengthened columns compared with control column(CC) For SG83.33 is 20.7% ,for SG50 is 49.1% , for SB83.33 is 6.7% , for SB50 is 13.3%, for SC83.33 is 29.49% ,for SC50 is 65% , for RG83.33 is 43.1% , for RG50 is 63.33% ,for RB83.33 is 24.9% ,for RB50 is 40.3%, for RC83.33 is 54.85% ,for RC50 is 67.26%.
Keywords: FRP, CC Column, Strengthening, Number of Wrap.
Scope of the Article: Concrete Structures