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Earthquake Response of Reinforced Concrete Building Retrofitted with Geopolymer Concrete and X-shaped Metallic Damper

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Abstract

A three-storey half scale reinforced concrete (RC) building is fixed with X-shaped metallic damper at the ground floor level, is designed and fabricated to study its seismic response characteristics. Experimental studies are carried out using the (4 m × 4 m) tri-axial shake-table facility to evaluate the seismic response of a retrofitted RC building with open ground storey (OGS) structure using yielding type X-shaped metallic dampers (also called as Added Damping and Stiffness-ADAS elements) and repairing the damaged ground storey columns using geopolymer concrete composites. This elasto-plastic device is normally incorporated within the frame structure between adjacent floors through chevron bracing, so that they efficiently enhance the overall energy dissipation ability of the seismically deficient frame structure under earthquake loading. Free vibration tests on RC building without and with yielding type X-shaped metallic damper is carried out. The natural frequencies and mode shapes of RC building without and with yielding type X-shaped metallic damper are determined. The retrofitted reinforced concrete building is subjected to earthquake excitations and the response from the structure is recorded. This work discusses the preparation of test specimen, experimental set-up, instrumentation, method of testing of RC building and the response of the structure. The metallic damper reduces the time period of the structure and displacement demands on the OGS columns of the structure. Nonlinear time history analysis is performed using structural analysis package, SAP2000.

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Acknowledgement

The authors are thankful to CSIR-Structural Engineering Research Centre, Chennai, India for the cooperation and guidance in Advanced Seismic Testing and Research Laboratory.

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Authors and Affiliations

  1. CSIR-Structural Engineering Research Centre, Chennai, India

    C. K. Madheswaran, J. Prakash vel, K. Sathishkumar & G. V. Rama Rao

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  1. C. K. Madheswaran
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  2. J. Prakash vel
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  3. K. Sathishkumar
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  4. G. V. Rama Rao
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Correspondence to C. K. Madheswaran.

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Madheswaran, C.K., Prakash vel, J., Sathishkumar, K. et al. Earthquake Response of Reinforced Concrete Building Retrofitted with Geopolymer Concrete and X-shaped Metallic Damper. J. Inst. Eng. India Ser. A 98, 41–52 (2017). https://doi.org/10.1007/s40030-017-0209-z

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  • DOI: https://doi.org/10.1007/s40030-017-0209-z

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