Category: Graduate Student Seminar Design Guidance for UHPC Connections of Precast Girders Made Continuous for Live Load

July 28, 2023 1:00 pm

In this quarterly Research Seminar, Royce W. Floyd, P.E., S.E., Ph.D., Principal Investigator; and Zachary Tiry, M.S. Student, present work under the ABC-UTC research project entitled Design Guidance for UHPC Connections of Precast Girders Made Continuous for Live Load [ABC-UTC-2016-C4-OU01], conducted at the University of Oklahoma.

Earn 1-hour Certificate of Attendance

Click to Register (opening soon!)

 Description: Connection of precast, prestressed concrete bridge girders to make spans continuous for live load allows for construction of bridges using precast elements while also allowing for structural benefits of live load continuity and durability benefits of reducing the number of bridge deck joints. Ultra-high performance concrete (UHPC) has mechanical and durability properties which far exceed those of conventional concrete and is, therefore, well-suited for continuity connections. While design of conventional concrete continuity joints is well known and frequently used in practice for new construction, little guidance exists on design of these connections using UHPC. The project described in this seminar extended previous research on structural behavior of UHPC continuity connections to produce design guidance using information from the literature and laboratory testing.



Royce Floyd, Ph.D., P.E., S.E.
Associate Professor
School of Civil Engineering and Environmental Science
The University of Oklahoma


Zachary Tiry
(M.S., May 2023, OU)
Graduate Structural Engineer
Half Associates
Richardson, Texas
Former Graduate Research Assistant
The University of Oklahoma

Presentation Graphics:


Figure 1. Joint reinforcement for hooked strand (a) and straight strand (b) designs


Figure 2. Typical continuity connection specimen failure when loaded in negative moment


Figure 3. Load-deflection curves for hooked and straight strand specimens tested for positive moment

Question & Answer Period: Submit your questions when you register for the seminar and also in the question box during the seminar. (15 minutes)

Certificate of Attendance: Each site registered for this seminar will receive an email for your response. Just click the first link in the email to obtain a certificate. For multiple participants at a site, the point-of-contact registrant for that site also clicks the second link in the email, logs in, and clicks “Attendees” to provide first name, last name, and email address for each participant at that site; each participant will then receive an automatic email with link to print an individual certificate. Accessing the second link in the email will also allow participants to print certificates for past seminars that were attended by simply clicking the seminar title. Please let Ms. Edda Juarez at FIU know if you have questions or need assistance with receiving your certificate. Edda’s email address is

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