International Concrete Abstracts Portal

Title: Update to Shear Strength Provisions for Concrete Columns in the ACI 369.1-22 Code (Prepublished)

Author(s): Ariel A. Suselo, Wassim M. Ghannoum, Adolfo B. Matamoros

Publication: Structural Journal

Volume:

Issue:

Appears on pages(s):

Keywords: cyclic loadings; diagonal tension; rectangular concrete columns; shear strength; short columns; slender columns; strut-and-tie; truss model

DOI: 10.14359/51745487

Date: 12/19/2024

Abstract:
This paper presents important revisions to the shear strength provisions for seismic assessment of reinforced concrete columns in the ACI 369.1-22 Code. A new formulation based on a strut-and-tie model is introduced to expand the range of application of existing provisions to include columns with shear span-to-depth ratios lower than 2. Revisions are proposed to the slender column provisions to improve their precision, reduce estimate bias, and eliminate instances where they produce unconservative estimates of shear strength. The proposed relations were calibrated using shear strength data from 94 shear-critical rectangular columns subjected to load reversals from a database developed at UTSA.