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A refined procedure for seismic evaluation and retrofitting of reinforced concrete buildings


Affiliations
1 Department of Civil Engineering, Indian Institute of Technology (BHU), Varanasi 221 005, India, India
2 Department of Civil Engineering, School of Engineering, University of the Peloponnese, GR-26334 Patras, Greece; School of Science and Technology, Hellenic Open University, GR-26335 Patras, Greece
3 Earthquake Engineering Research Centre, International Institute of Information Technology, Hyderabad 500 032, India, India
4 Department of Civil and Architectural Constructions, Faculty of Technology and Education, Sohag University, Sohag 82524, Egypt
 

In the present study, a refined procedure for the seismic evaluation and retrofitting of reinforced concrete (RC) buildings based on the ‘quadrants assessment method’ and ‘material strain limit approach’ is proposed and numerically analysed. The quadrants assessment method involves the performance point, design base shear and threshold damage limit state. Herein, four existing RC buildings (models 1–4) are considered from the Koyna–Warna region, Maharashtra (zone-IV, India). These four buildings were studied using nonlinear static ada­ptive pushover analysis employing the SeismoStruct software. Based on the quadrants assessment method, the three-storey RC building (model-1) was retrofitted with RC jacketing, while the other three RC buildings did not need to be retrofitted. Also, significant seismic design parameters like ductility, over strength factor, response reduction factor, etc. were evaluated before and after retrofitting. The results depict that the combi­nation of the ‘quadrants assessment method’ and ‘mate­rial strain limit approach’ is a rapid, reliable and refined procedure for seismic evaluation and retrofitting of RC buildings
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  • A refined procedure for seismic evaluation and retrofitting of reinforced concrete buildings

Abstract Views: 158  |  PDF Views: 77

Authors

Mangeshkumar R. Shendkar
Department of Civil Engineering, Indian Institute of Technology (BHU), Varanasi 221 005, India, India
Denise-Penelope N. Kontoni
Department of Civil Engineering, School of Engineering, University of the Peloponnese, GR-26334 Patras, Greece; School of Science and Technology, Hellenic Open University, GR-26335 Patras, Greece
Ramancharla Pradeep Kumar
Earthquake Engineering Research Centre, International Institute of Information Technology, Hyderabad 500 032, India, India
Ahmed Abdelraheem Farghaly
Department of Civil and Architectural Constructions, Faculty of Technology and Education, Sohag University, Sohag 82524, Egypt
Sasankasekhar Mandal
Department of Civil Engineering, Indian Institute of Technology (BHU), Varanasi 221 005, India, India
Pabitra Ranjan Maiti
Department of Civil Engineering, Indian Institute of Technology (BHU), Varanasi 221 005, India, India

Abstract


In the present study, a refined procedure for the seismic evaluation and retrofitting of reinforced concrete (RC) buildings based on the ‘quadrants assessment method’ and ‘material strain limit approach’ is proposed and numerically analysed. The quadrants assessment method involves the performance point, design base shear and threshold damage limit state. Herein, four existing RC buildings (models 1–4) are considered from the Koyna–Warna region, Maharashtra (zone-IV, India). These four buildings were studied using nonlinear static ada­ptive pushover analysis employing the SeismoStruct software. Based on the quadrants assessment method, the three-storey RC building (model-1) was retrofitted with RC jacketing, while the other three RC buildings did not need to be retrofitted. Also, significant seismic design parameters like ductility, over strength factor, response reduction factor, etc. were evaluated before and after retrofitting. The results depict that the combi­nation of the ‘quadrants assessment method’ and ‘mate­rial strain limit approach’ is a rapid, reliable and refined procedure for seismic evaluation and retrofitting of RC buildings

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DOI: https://doi.org/10.18520/cs%2Fv123%2Fi8%2F1020-1030