Compression Splices in Confined Concrete of 40 and 60 MPa (5800 and 8700 psi) Compressive Strengths

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Compression Splices in Confined Concrete of 40 and 60 MPa (5800 and 8700 psi) Compressive Strengths

Author(s): Sung-Chul Chun, Sung-Ho Lee, and Bohwan Oh

Publication: Structural Journal

Volume: 107

Issue: 4

Appears on pages(s): 476-485

Keywords: bond; compression lap splice; end bearing; splice strength

Date: 7/1/2010

Abstract:
A compression lap splice may be calculated to be longer than a tension lap splice in high-strength concrete according to current design codes. An experimental study was conducted on compressive lap splices using concrete compressive strengths of 40 and 60 MPa (5800 and 8700 psi), and the effects of transverse reinforcement were assessed. Test results showed that the end bearing was improved by the provision of transverse reinforcement exclusively at the ends of the splice and that the bond increased proportionally to the amount of transverse reinforcement, up to a transverse reinforcement index (Ktr/db = 40Atr /(strdbn)) of 1.76. The bar stresses developed by the bond were nearly identical to those calculated by the equation of Orangun et al.; therefore, the strength increase in the compression splices was attributed solely to the end bearing. A design equation was derived for compression lap splices with transverse reinforcement through regression analysis. In addition, a simplified equation for design was suggested.