International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 05 | May 2023
p-ISSN: 2395-0072
www.irjet.net
Comparative Design of Column for Different Strengthening Techniques (CFRP) Mahesh Sawant1, Nagesh Shelke2 1PG Student, Department of Civil Engineering Dr. D Y Patil School of Engineering and Technology, Charholi (BK),
Pune-412 105, Maharashtra, India
2Associate Professor, Dept. of Civil Engineering, Dr. D Y Patil School of Engineering and Technology, Charholi (BK),
Pune-412 105 Pune, Maharashtra, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Structures with the passing of time, they lose
destructive testing of the structural members in the fireaffected areas.
their strength because of various factors like improper maintenance, corrosion of steel reinforcement, poor construction exposure to harmful environments and improvement in design guidelines. These structural elements become statically unsafe. Enhancement of performance of such RC structural elements can be done by increasing strength and strength of structural elements can be increased by process of Retrofitting.
This proposal report comprises a structural strengthening scheme, design calculation, and construction methodology for the Columns.
2.METHODOLOGY 1. Surface Preparation
As per the report of the rebound hammer test and core compressive test performed on columns at the 2nd and 3rd Floor levels, it was observed that total 56 numbers of columns have inadequate compressive strength as compared to their original design grade which was M40. Hence these columns require structural strengthening to achieve the required strength.
2. Forming Radius at Corners
Key Words: CFRP, Retrofitting, Column Strengthening, RC Structural
7. Cutting Fiber to The Required Length
1.INTRODUCTION
9. Fixing of R&M Fiber Anchors, Top Coat, And Sand Sprinkling
Retrofitting is defined as the process of modification of existing structures like buildings, bridges to make more resistant to seismic activity and other natural calamities. Structures with the passing of time they lose their strength because of many reasons like seismic activity, soil failure due to ground motion, arises problem like damaging of roof, foundation, walls, pillars, column and beams for these structures becomes statically unsafe and solution to these problem is Retrofitting. The structure performs normally during their life span but at the end of design period of structure, the structure may not be capable of taking load. Strengthening with Fiber Reinforced Polymers (FRP) composite materials in the form of external reinforcement is of great interest to the civil engineering community.
10. Protective Coating
3. Marking on The Surface 4. Drilling for Anchors 5. Applying R&M Primer Coating 6. Application of R&M Resin Putty 8. Application of Carbon Fiber Wrap
2.1
2.1.1 General: Preparing the substrate surface (concrete, brick, steel, or timber) for effective bonding of the overlay is an important step in the methodology of CFRP Application. It includes various tasks like;
Orchid City Centre Mall is a commercial building located at Mumbai Central, Mumbai, Maharashtra. The building is an RCC-framed Structure. Years later the building experienced a fire at the 2nd and 3rd Floor levels. Further to the incident, the fire-affected areas were structurally assessed, the investigation includes the visual, non-destructive &
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SURFACE PREPARATION
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Removal of loose/nonstructural layers such as CM plaster or Putty layers etc.
Cleaning foreign deposits on the surface Leveling the undulations in the surface etc.
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