Experimental investigation of the contributions of CFRP and externally collar strengthening to the seismic performance of RC columns with different cross-sections

Dirikgil T.

STRUCTURES, vol.24, pp.266-281, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 24
  • Publication Date: 2020
  • Doi Number: 10.1016/j.istruc.2020.01.014
  • Journal Name: STRUCTURES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.266-281
  • Keywords: RC column, Hysteretic behavior, CFRP wrap, Externally collar, Cross-section size, REINFORCED-CONCRETE COLUMNS, FRP-CONFINED CONCRETE, STRESS-STRAIN MODEL, SHEAR-STRENGTH, ACTIVE CONFINEMENT, DUCTILITY, CAPACITY, RETROFIT, BEHAVIOR
  • Erciyes University Affiliated: Yes

Abstract

In this study, the performance of nine reinforced concrete (RC) short columns under cyclic lateral loading effect was investigated experimentally. The columns are divided into three series with cross-sectional dimensions of 300 x 400, 300 x 550 and 300 x 700 mm(2). Each series includes three columns that are strengthened with one Reference column, two CFRP Wrap and Externally Collar columns. Aspect ratios (alpha(s)) of all columns in the series are 1.5. Therefore, the columns were tested under the same behavior demand according to the cross-section dimension. Reference columns in each series are perfect columns with sufficient stirrup spacing as required by regulations. The performance of RC columns was evaluated in terms of crack development, hysteretic character, stiffness, ductility, and energy consumption. The results showed that CFRP wrap and collar strengthening significantly improved the performance of the columns.