Structural Engineering and Mechanics

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Seismic risk priority classification of reinforced concrete buildings based on a predictive model

  • Isil Sanri Karapinar (Department of Civil Engineering, Maltepe University) ;
  • Ayse E. Ozsoy Ozbay (Department of Civil Engineering, Maltepe University) ;
  • Emin Ciftci (Department of Civil Engineering, Maltepe University)
  • Received : 2024.02.26
  • Accepted : 2024.07.15
  • Published : 2024.08.10
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Abstract

The purpose of this study is to represent a useful alternative for the preliminary seismic vulnerability assessment of existing reinforced concrete buildings by introducing a statistical approach employing the binary logistic regression technique. Two different predictive statistical models, namely full and reduced models, were generated utilizing building characteristics obtained from the damage database compiled after 1999 Düzce earthquake. Among the inspected building parameters, number of stories, overhang ratio, priority index, soft story index, normalized redundancy ratio and normalized lateral stiffness index were specifically selected as the predictor variables for vulnerability classification. As a result, normalized redundancy ratio and soft story index were identified as the most significant predictors affecting seismic vulnerability in terms of life safety performance level. In conclusion, it is revealed that both models are capable of classifying the set of buildings being severely damaged or collapsed with a balanced accuracy of 73%, hence, both are able to filter out high-priority buildings for life safety performance assessment. Thus, in this study, having the same high accuracy as the full model, the reduced model using fewer predictors is proposed as a simple and viable classifier for determining life safety levels of reinforced concrete buildings in the preliminary seismic risk assessment.

Keywords

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