Title:
Compression Splices in High-Strength Concrete of 100 MPa (14,500 psi) and Less
Author(s):
Sung-Chul Chun, Sung-Ho Lee, and Bohwan Oh
Publication:
Structural Journal
Volume:
108
Issue:
6
Appears on pages(s):
715-724
Keywords:
bond; compression lap splice; end bearing; splice length; splice strength
DOI:
10.14359/51683370
Date:
11/1/2011
Abstract:
In high-strength concrete, a compression lap splice may be calculated to be longer than a tension lap splice according to ACI 318-08. An experimental study of 72 specimens was conducted on compressive lap splices using concrete compressive strengths of 80 and 100 MPa (11,600 and 14,500 psi), and the effects of concrete strength, splice length, and transverse reinforcement were assessed. From the regression analyses of 94 tests that failed in splitting, including the data in the literature, two equations were developed with √ls/db and ls/db to predict the splice strength. Using a 5% fractile coefficient, two design equations for the splice length were derived. The proposed equations provide shorter lengths than the splice length in tension, as given by ACI 318-08. In addition, there is no significant difference between the lengths calculated by the two equations. Therefore, a simple equation with the term of fy/√fc′ is practically useful within the tested ranges.