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Retrofitting of Seismically Damaged Open Ground Storey RCC Framed Building with Geopolymer Concrete

  • Pinky Merin PhilipEmail author
  • C. K. Madheswaran
  • Eapen Skaria
Conference paper

Abstract

Retrofitting is a technique in damaged structure is strengthened to original design requirements. The recent earthquake occurred in India during 2001 in Gujarat, damaged many buildings that were seismically deficient. So there is an urgent need for retrofitting of damaged buildings. This calls for techniques that are technically sound and economically feasible to upgrade deficient and damaged structures. Also, Portland cement (PC) production is under critical review due to high amount of carbon dioxide gas released to the atmosphere and Portland cement is also one among the most energy-intensive construction materials. The current contribution of greenhouse gas emission from Portland cement production is about 1.5 billion tons annually or about 7 % of the total greenhouse gas emissions to the earth’s atmosphere. So retrofitting of existing deficient building using eco-friendly material which could promise higher structural performance than the original building is essential. Many retrofitting methods such as epoxy injection, CFRP, GFRP wrappings etc. are used currently, but there is a mismatch in tensile strength and stiffness of these materials with that of concrete structure. The Geopolymer concrete (GPC) is fire and acid resistant, highly durable, less shrinkage, low permeable and attains strength within 3 days of ambient air curing. So the feasibility study of geopolymer concrete in retrofitting of damaged reinforced concrete (RC) beams and RC building is presented in this paper. An open ground three storey seismically damaged RCC building is retrofitted with GPC at cracked portions. And free vibration test is carried out using reaction mass shaker to obtain the natural frequencies and mode shapes. Also using finite element method in ANSYS software modal analysis is done on the building for natural frequencies and mode shapes. This paper presents the experimental and analytical results of natural frequencies and mode shapes.

Keywords

Retrofitting Geopolymer concrete Natural frequency Mode shapes 

Notes

Acknowledgments

This paper is being published with the permission of the Director, CSIR-SERC, Chennai. The cooperation and guidance received from Dr. K. Muthumani, Dr. N. Gopalakrishnan and the technical staffs of Advanced Seismic Testing and Research Laboratory of CSIR-SERC are gratefully acknowledged.

Reference

  1. 1.
    Vasconcelos E, Fernandes S, Barroso de Aguiar JL, Pacheco-Torgal F (2011) Concrete retrofitting using metakaolin geopolymer mortars and CFRP. Constr Build Mater 25:3213–3221Google Scholar

Bibliography

  1. 2.
    Amarnath C, Menon D, Sengupta AK (2008) Handbook on seismic retrofit of buildings. Narosa Publishing House Pvt. Ltd, New DelhiGoogle Scholar
  2. 3.
    Bansal PP, Kumar M, Kaushik SK (2008) Effect of type of wire mesh on strength of beams retrofitted using Ferrocement laminates. Nat Build Mater Construction 5: 272–278Google Scholar
  3. 4.
    Alaee FJ, Karihaloo BL (2003) Retrofitting of reinforced concrete beams with CARDIFRC. J Compos Constr 7(3):174–186Google Scholar
  4. 5.
    Ronagh HR, Eslami A (2013) Flexural retrofitting of RC buildings using GFRP/CFRP—a comparative study. Compos Part-B 46:188–196Google Scholar
  5. 6.
    IS 456 (2000) Indian code of practice for plain and reinforced concrete. Bureau of Indian Standards, New DelhiGoogle Scholar
  6. 7.
    Madheswaran CK, Ambily PS, Rajamane NP, Arun G (2014) Studies on flexural behavior of reinforced geopolymer concrete beams with lightweight aggregates. Int J Civ Struct Eng 4(3). ISSN:0976-4399Google Scholar
  7. 8.
    Santhakumar R, Chandrasekaran E, Dhanaraj R (2004) Analysis of retrofitted reinforced concrete shear beams using carbon fiber composites. Electron J Struct Eng 4:66–74Google Scholar
  8. 9.
    Rangan BV, Hardjito D (2005) Development and properties of low calcium fly ash based geopolymer concrete. Research report GC-1, 2005, Faculty of Engineering, Curtin University of Technology, Perth, AustraliaGoogle Scholar
  9. 10.
    Patankar SV, Jamkar SS, Ghugal YM (2013) Effect of water-to-geopolymer binder ratio on the production of fly ash based geopolymer concrete. Int J Adv Technol Civ Eng 2(1). ISSN:2231–5721Google Scholar
  10. 11.
    Uma K, Anuradha R, Venkatasubramani R (2012) Experimental investigation and analytical modeling of reinforced geopolymer concrete beam. Int J Civ Struct Eng 2:817–827Google Scholar
  11. 12.
    Warner RF, Rangan BV, Hall AS, Faulkes KA (1998) Concrete structures. Addison Wesley Longman Australia Ltd., MelbourneGoogle Scholar
  12. 13.
    Murthy CVR, Das D (2004) Brick masonry infill in seismic design of RC framed buildings: part 1—cost implications. Indian Concr J 78:39–44Google Scholar

Copyright information

© Springer India 2015

Authors and Affiliations

  • Pinky Merin Philip
    • 1
    Email author
  • C. K. Madheswaran
    • 2
  • Eapen Skaria
    • 3
  1. 1.Saintgits College of EngineeringKottayamIndia
  2. 2.CSIR-Structural Engineering Research CentreChennaiIndia
  3. 3.Department of Civil EngineeringSaintgits College of EngineeringKottayamIndia

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