Title:
Investigating Interface Shear Resistance through Slant Shear Tests: A Critical Review of Current Design Codes
Author(s):
Brandon Li and Andrea Campos Sanchez
Publication:
Web Session
Volume:
ws_F23_BrandonLi.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
This presentation summarizes the results of an experimental study investigating interface shear resistance through slant shear tests. A total of 54 tests were conducted on 6×12-inch cylinders with inclined cold joints. Six key test parameters were investigated: inclination angle, interface roughness, concrete compressive strength, casting age difference, aggregate size, and reinforcement crossing the cold joint. The test results showed that interface roughness and aggregate size have the most significant impact on the interface shear resistance. A comprehensive analytical study was conducted including the comparison of five current design codes. A modified approach is proposed for calculating the interface shear resistance, compatible with current design codes’ expressions. The proposed approach was validated using the experimental results from this study and 124 test results from different research programs. Overall, the proposed approach resulted in more accurate estimations for the interface shear, especially for specimens with intermediary levels of amplitude at the interface.