Title:
One-Way Shear Design for Transverse Bar-Free Ultra-High-Performance Concrete Members (Prepublished)
Author(s):
Abdulrahman Salah and Dimitrios Kalliontzis
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
ACI 318; fiber alignment; shear design; size effects; ultra-high-performance concrete
DOI:
10.14359/51749307
Date:
11/6/2025
Abstract:
This paper presents a design model for the one-way shear of ultra-high-performance concrete (UHPC) beams without transverse reinforcement. The model unifies the shear design of UHPC with the ACI 318 shear design approach for conventional concrete. Hence, the proposed model accounts for the longitudinal reinforcement ratio, the axial load effects, while the tensile strength of UHPC replaces the concrete compressive strength term. The effects of fiber type, fiber alignment, beam shape, and beam size are incorporated through dimensionless parameters, with their values calibrated using UHPC beam and panel shear datasets. The proposed shear model was evaluated using a database of 137 UHPC non-prestressed and prestressed rectangular and I-shape beam shear tests performed in the United States and elsewhere.