Title:
Shear Strength Model for Steel Fiber-Reinforced Concrete Columns
Author(s):
Wisena Perceka and Wen-Cheng Liao
Publication:
Structural Journal
Volume:
120
Issue:
6
Appears on pages(s):
35-47
Keywords:
axial loading; concrete shear strength; high-strength concrete; shear strength equation; steel fiber; strength redistribution
DOI:
10.14359/51739084
Date:
11/1/2023
Abstract:
This paper aims to propose shear strength prediction equations for
steel fiber-reinforced concrete (SFRC) columns by observing mechanisms
known from the test results of SFRC columns subjected to
lateral cyclic and different axial loading levels. The experimental
results are first compared to the shear strength models previously
proposed. The comparison is emphasized on the concrete contribution
because the experimental results showed that the axial loading
level significantly affected the internal redistribution from concrete
to shear reinforcing bars. The proposed equations are examined
using experimental results of 25 SFRC columns. The average
measured-to-proposed shear strength ratio is 1.02, with a standard
deviation of 0.18 and a coefficient of variation (COV) of 17%. By
setting the equivalent bond strength value for all cases, the accuracy
drops by 11 and 17% for standard deviation and COV, respectively,
with an average measured-to-proposed shear strength ratio
of 1.00. The proposed equations predict the actual test data with
higher accuracy compared to other equations.