High-strength concrete columns under eccentric load

CANBAY E., Özcebe G., Ersoy U.

Journal of Structural Engineering, vol.132, no.7, pp.1052-1060, 2006 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 132 Issue: 7
  • Publication Date: 2006
  • Doi Number: 10.1061/(asce)0733-9445(2006)132:7(1052)
  • Journal Name: Journal of Structural Engineering
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1052-1060
  • Keywords: Concrete columns, Confinement, Eccentric loads, High strength concrete
  • TED University Affiliated: No


The behavior of high strength concrete tied columns was investigated. A total of 11 columns were tested under monotonic loading having two different eccentricities. The main variables investigated were: (1) the mechanical ratio, (2) the spacing, and (3) the configuration of transverse reinforcement. Test results indicate that, under monotonically increasing axial load, the cross ties with a 135° hook at one end and 90° bent at the other end provide ductility comparable to ties supporting the intermediate longitudinal bars. Also the use of four different equivalent rectangular stress blocks (ERSBs) in predicting the ultimate strength of members made of high strength concrete was evaluated. It is concluded that calculations made using the ACI 318-02 stress block always gives an upper bound, whereas a lower bound is obtained by the CSA A23.3-94 approach. Capacities calculated using the ERSB proposed by Bae and Bayrak, and Ozbakkaloglu and Saatcioglu also agree quite well with the test results. © ASCE.