Title:
A Comprehensive Multi-Metric Comparison of One-Way Shear Models for Reinforced Concrete Beams Without Shear Reinforcement (Prepublished)
Author(s):
Amir Mofidi, Sara Mirzabagheri, Kourosh Nasrollahzadeh, Shahryar Rahnamayan
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
accuracy; building code; multi-metric comparative study; one-way shear; Pareto analysis; safety; statistical tests
DOI:
10.14359/51749319
Date:
11/12/2025
Abstract:
The ACI CODE-318-19 provisions for one-way shear strength (Vc) in reinforced concrete (RC) members were majorly modified for the first time since 1963. ACI CODE-318-19 equation addresses certain previously identified limitations of the well-known Vc= 0.17λ√fc′bwd equation for members without shear steel reinforcement, incorporating factors such as size effect and the influence of longitudinal reinforcement ratio. This study takes a multi-metric approach to evaluate the accuracy and safety of ACI CODE-318-19’s one-way shear relationship for RC members without stirrups. ACI CODE-318-19 predictions are compared against those of its predecessor and other state-of-the-art models, using a database of experimental results gathered by joint ACI-ASCE Committee 445 and DAfStb. This study shows that the ACI CODE-318-19 equation significantly improved accuracy and safety over the ACI CODE-318-14 provisions. One-way shear predictions of ACI CODE-318-19 for RC members without shear reinforcement are generally comparable to existing models, though certain aspects may benefit from continued development and refinement.