Title:
Behavior of RC Beams with Large Diameter High-Strength Tension Spliced Bars (Pre-Published)
Author(s):
Yongjae Yu, Cheska Espanol, Elias I. Saqan, and Oguzhan Bayrak
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
crack width; development length; high-strength reinforcing bar; large-scale tests; RC beam; tension lap splice
DOI:
10.14359/51742243
Date:
9/3/2024
Abstract:
Design codes such as ACI 318-19 and AASHTO LRFD (2020) have permitted the use of high-strength steel in specific provisions. Particularly, reinforcing bars with a yield strength of 100 ksi and a size as large as No. 11 are permitted for use in tension lap splices. However, the amount of test data using larger-diameter bars, especially No. 11 high-strength bars, is limited. In this study, four large-scale reinforced concrete beams with No. 11 bars were tested in four-point bending. The beams were grouped in two groups, one utilized Grade 60 steel while the other utilized Grade 100 steel. Within each group, one beam had continuous bars, while the second beam had spliced bars. Test results showed that splicing No. 11 high-strength reinforcing bars had adequate load-carrying capacity; however, the crack width may not be adequate. Therefore, test results indicate that using No. 11 high-strength reinforcing bars in tension lap splice applications should be used with caution.