Quarterly Research Seminar (formerly Graduate Student Seminar)

April 28, 2017 1:00 pm

In this Research Seminar (formerly known as Graduate Student Seminar) Terry Wipf, Ph.D.; Ashley Ecklund; and Sri Sritharan, Ph.D., present their work under the ABC-UTC research project entitled Development of Prefabricated Bridge Railings conducted at Iowa State University in Ames.

Seminar Documents:
Development of Prefabricated Concrete Bridge Railings: Phase I Testing and Results - pdf of presentation

Description: To complement Accelerated Bridge Construction (ABC) projects and to promote easy repair of damaged barriers, a precast bridge railing project was undertaken. This effort resulted in a 12-ft long, 42-in. tall, F-shaped barrier, one barrier-to-barrier connection and two barrier-to-deck connections. One barrier-to-deck connection was designed with inclined bars while the other was designed with u-shaped bars. Developed barrier details were investigated using a full-scale unit consisting of two barriers and a deck. This unit was subjected to several tests in a quasi-static manner to verify the load resistance and the load distribution. Overall, the barriers and the barrier-to-barrier connection performed well. Of the two barrier-to-deck connections, one with the inclined bars performed well. The connection with the U-bars experienced premature failure, but the required improvement was evident from the test results. The presentation will include the connection details, construction, test observations, and interpretation of test data.



Terry Wipf, Ph.D.
Don and Sharon Greenwood Endowed Department Chair
Department of Civil, Construction and Environmental Engineering
Iowa State University


Ashley Ecklund
(M.S.E., 2016, Iowa State University)
Structural Engineer-in-Training
BKBM Engineers
Minneapolis, MN


Sri Sritharan, Ph.D.
Wilkinson Chair Professor of Engineering
Department of Civil, Construction and Environmental Engineering
Iowa State University

Presentation Graphics:

Figure 1. Barrier-to-barrier connection

Figure 2. Installing connection reinforcement and grouting

Figure 3. Barrier unit under test

Figure 4. Damaged unit at the end of test

Question & Answer Period: Submit your questions when you register for the seminar and also in the question box during the seminar. (10 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 Dr. David Garber at FIU know if you have questions or need assistance with receiving your certificate. David’s email address is dgarber@fiu.edu.

For More Information: Please contact us by sending an email to abc@fiu.edu.