Title:
Effect of Noncontact Lap Splices in Reinforced Concrete Beams
Author(s):
Hyeon-Jong Hwang, Fan Yang, and Gao Ma
Publication:
Structural Journal
Volume:
119
Issue:
2
Appears on pages(s):
3-15
Keywords:
lap splice; moment distribution; noncontact lap splice; reinforced concrete beam; reinforcing bar stress
DOI:
10.14359/51734374
Date:
3/1/2022
Abstract:
Current design codes specify the bar development length empirically based on contact lap splice test results. The bar splice length of noncontact lap splices is not clearly specified due to limited test results. In the present study, the bond performance of noncontact lap splices was investigated. Lap splice tests were performed on 24 beam specimens under uniformly distributed moment or nonuniformly distributed moment with shear force. The test parameters were spacing of spliced bars, reinforcing bar diameter, transverse reinforcement, and moment distribution. The test results showed that the tensile stress of bar splices increased as the spacing of spliced bars increased in the specimens with stirrups. In the specimens under nonuniformly distributed moment with shear force, the bar splices exhibited better bond strength. The test results were compared with the predictions of current design codes.
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