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Sessions & Events

The full schedule of events is now available. Additionally, attendees can access the convention app and build their personal schedule starting Thursday, March 13, 2025. All sessions and events take place in Eastern Daylight Time (EST UTC-4). All events take place at the Sheraton Centre Toronto.

On-demand sessions will be available for viewing in the convention platform/event app under "On-Demand Content" within 24-48 hours of the session premiere. Please note, on-demand sessions are not available for CEU credit. *Denotes on-demand content.

M=Main Reception Building; C=Convention Center

State of the Art of High Strength Reinforcing Steel for Seismic Applications

Wednesday, April 2, 2025 11:00 AM - 1:00 PM, Civic Ballroom North

This session is dedicated to researchers and practitioners interested in incorporating High-Strength Reinforcing Steel (HSRS) for seismic applications. The session aims to present the current state of the transition to use HSRS in RC structures located in regions with high seismicity. The session will include concepts, benefits, challenges, and ongoing research to use HSRS for seismic applications.

Learning Objectives:
(1) Build confidence in engineers to incorporate HSRS in seismic applications by understanding research findings and technical considerations;
(2) Recognize the efforts by DOTs to adopt HSRS in the seismic design of structures;
(3) Discuss the impact of manufacturing processes on the seismic behavior of RC members reinforced using high-strength reinforcing steel, based on research findings;
(4) Examine ongoing research for using mechanical splices with high-strength reinforcing steel, including evaluation of performance and testing procedures.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.

The Application of Grade 550 MPa High-Strength Reinforcement in Bridge Columns for Seismic Regions

Presented By: YU-CHEN OU
Affiliation:
Description: In this study, high-strength Grade 550 MPa D36 (#11) and D43 (#14) deformed steel bars are used as longitudinal reinforcement in bridge columns. For transverse reinforcement, either high-strength Grade 550 MPa straight deformed bars or coiled deformed bars are used. Straight deformed bars are used for conventional tie reinforcement, while coiled deformed bars are used for multi-spiral reinforcement. The use of high-strength reinforcement reduces reinforcement costs, improves constructability, and lowers carbon dioxide emissions associated with steel production. Additionally, using large-diameter (D43 #14) longitudinal reinforcement decreases the number of longitudinal bars required, further enhancing constructability. This presentation discusses a series of tests evaluating the mechanical properties of the Grade 550 MPa high-strength steel reinforcement and their mechanical couplers and headed anchorages. Furthermore, it presents tests on the seismic capacity of column specimens.

Observations on the Effect of the Manufacturing Process on the Seismic Behavior of HSRS and Ongoing Research

Presented By: Maria Luisa Duran
Affiliation: North Carolina State University
Description: This presentation addresses the seismic behavior of ASTM A706 Grade 80 reinforcing steel across different manufacturing processes. It covers observations from ongoing research, including the effects of manufacturing processes under low temperatures for seismic demands and high-rate loading using shake table tests. The presentation also includes material characterization analysis and a parametric study to evaluate Grade 80 steel exhibiting RoundHouse characteristics in the stress-strain curve, without a defined yield plateau.

Seismic Performance of High-Strength Steel Mechanical Splices

Presented By: Latip Kumar Sharma
Affiliation: University of Texas San Antonio
Description: This presentation addresses the seismic behavior of mechanical devices with high-strength reinforcing steel. It covers the evaluation of mechanical devices with grade 80 bars subjected to high strain demands, the development of testing protocols for pre-qualifying mechanical splices in hinge regions, the determination of the minimum acceptable inelastic cyclic performance of mechanical couplers in hinge regions, and the development of detailing requirements that may be needed to achieve an acceptable seismic response. Results from in-air inelastic cyclic testing and full-scale reinforced concrete wall testing will be presented.

State of the Art of High Strength Reinforcing Steel for Seismic Applications - Panel Discussion

Presented By: Lina Espinosa
Affiliation: North Carolina State University
Description:

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