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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 3355 Abstracts search results
Document:
CI4707NexInsights
Date:
July 1, 2025
Publication:
Concrete International
Volume:
47
Issue:
7
Abstract:
A new certification program co-sponsored by NEx: An ACI Center of Excellence for Nonmetallic Building Materials is now available through ACI Certification. The program, titled “GFRP Reinforcing Bar Inspector” is designed to qualify individuals responsible for inspecting the installation of glass fiber-reinforced polymer (GFRP) reinforcing bars in concrete construction. This program reinforces NEx’s mission to advance the safe and effective use of nonmetallic materials.
CI4705ConcreteQA
May 1, 2025
5
This month’s Q&A discusses minimum requirements for performing, implementing, and documenting service life predictions on new construction projects per ACI CODE-365-24. It outlines the service life prediction process and provides information on the role and responsibilities of a service life engineer.
CI4705NexInsights
NEx: An ACI Center of Excellence for Nonmetallic Building Materials held a full-day technical workshop on “Design of GFRP-Reinforced Slabs-on-Ground and Paving” at the ACI Concrete Convention in Toronto, ON, Canada, on March 31, 2025. In addition, NEx hosted an exclusive lunch for members, speakers, and industry leaders to connect.
SP365_10
March 1, 2025
Author(s):
Anca Ferche and Vahid Sadeghian
Symposium Papers
365
Developed 40 years ago by Frank Vecchio and Michael Collins, the Modified Compression Field Theory (MCFT) and its successor, the Disturbed Stress Field Model (DSFM), have proven to be robust methodologies in modeling the response of concrete structures. Originally developed for newly designed concrete structures, they have been refined over the years to expand their applicability to various engineering problems, including modeling deteriorated and repaired structures. This paper reviews the evolution and application of MCFT in modeling and assessment of deteriorated and repaired concrete structures. The first part focuses on the application of MCFT to advanced field structural assessment, including stochastic analysis procedures that incorporate field data. The second part discusses the evolvement of MCFT to account for two of the most common deterioration mechanisms, reinforcement corrosion and alkali-silica reaction. The last part explores the application of the model to structures repaired with fiber-reinforced polymer composites. It is concluded that the extension of the MCFT formulation has enabled it to reliably predict the behavior of both deteriorated and repaired concrete structures.
DOI:
10.14359/51746690
SP365_01
Graeme J. Milligan, Maria Anna Polak and Cory Zurell
Due to the low lateral stiffness of slabs supported on columns alone reinforced concrete flat plates are typically combined with other structural elements, such as shearwalls. In these structures, the slab-column connections are designed to carry gravity loads only, and the shearwalls, which also carry gravity loads, are required to resist the lateral forces. Therefore, the slab-wall connections (SWCs) are essential for the adequate performance of both the gravity and lateral force resisting systems. However, the majority of punching shear research and design provisions have been focused on slab-column connections, even though punching failures around slab-wall connections have been observed experimentally. Empirical testing of slab-wall connections is difficult due to the required specimen size. This paper investigates the punching shear behaviour of interior slab-wall connections subjected to concentric vertical loading, and combined concentric vertical loading and uniaxial unbalanced moment using a plasticity-based nonlinear finite element model (FEM) in Abaqus. The FEM, developed to study the impact of column aspect ratio on punching shear, was calibrated considering seven isolated slab-column specimens. The analysis of isolated slab-wall connections demonstrates that punching failures can occur before one-way shear failures, although the connection capacity is much higher than the expected loads in most structures. Punching shear design methods for interior slab-wall connections subjected to gravity load only, developed from finite element analysis results, are developed and presented in the paper.
10.14359/51746680
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