Interface slip model for reinforced concrete columns strengthened with concrete jacketing

  • Naci Caglar Sakarya University (Turkey)
  • Alexander Sichko The Ohio State University (United States of America)
  • Halil Sezen The Ohio State University (United States of America)
  • Erkan Bicici Artvin Coruh University (Turkey)
  • Aydin Demir Sakarya University (Turkey)
  • Ahmad Farhan Farah Sakarya University (Turkey)
Keywords: Concrete Structures, Columns, Rehabilitation, Finite Element Method, Bond

Abstract

Retrofit and rebuilding are two potential solutions for reinforced concrete (RC) structures with columns that have insufficient detailing or strength to withstand seismic loads or other extreme events. Demolition and rebuilding can be expensive and time-consuming. Thus, retrofitting and strengthening of columns can be an efficient solution. Jacketing of reinforced concrete columns is one of the common methods for retrofit and rebuilding. For jacketing method, the main concern is the performance loss between new and old concrete due to interface slip. There are three major options to provide a better performance, as surface roughening, dowels, and both. In this study, the methods to provide coworking of new and old concrete are evaluated with respect to four parameters; strength, energy dissipation, stiffness, and displacement ductility. Additionally, a slip coefficient is proposed to model the friction between new and old concrete. The proposed model is applied into OpenSees and a Finite Element (FE) software. The slip coefficient is simulated numerically by a friction coefficient using a tangential contact behavior definition as well. Finally, a slip coefficient is proposed for each method.

Author Biographies

Naci Caglar, Sakarya University (Turkey)

Civil Engineering

Alexander Sichko, The Ohio State University (United States of America)

Civil, Environmental and Geodetic Engineering

Halil Sezen, The Ohio State University (United States of America)
Civil, Environmental and Geodetic Engineering

 

Erkan Bicici, Artvin Coruh University (Turkey)
Department of Architecture

 

Aydin Demir, Sakarya University (Turkey)

Civil Engineering

Ahmad Farhan Farah, Sakarya University (Turkey)
Civil Engineering  
Published
2020-08-25