More Choices for Connecting Prefabricated Bridge Elements and Systems (PBES)

January 29, 2021 1:00 pm

In this quarterly Research Seminar, Mohamed Moustafa, Ph.D., P.E., Principal Investigator; and Mohamed Abokifa, Ph.D. Student, present work under the ABC-UTC research project entitled More Choices for Connecting Prefabricated Bridge Elements and Systems (PBES) conducted at the University of Nevada, Reno.

Earn 1-hour Certificate of Attendance

Click to Register


 Description:

Full-depth precast bridge deck panels are widely used to expedite bridge deck erection and accelerate bridge construction. Full-depth deck joints with concave shear key type are currently common in bridge decks, with ultra-high performance concrete (UHPC) widely used for the closure pours of such joints. UHPC has superior mechanical properties but has cost and bidding challenges due to the limited number of suppliers and the special expertise needed for placement. Poly-methyl methacrylate polymer concrete (PMMA-PC) is another popular advanced construction material commonly used for overlays and can provide a potential alternative to UHPC for deck joints. PMMA-PC provides high early bond and shear strength, adequate flowability, and high durability. The objective of this study is to investigate and compare the structural performance of using PMMA-PC and UHPC for closure pours in full-depth field joints. An experimental program was conducted to test five full-scale specimens under monotonic vertical loading. Three specimens represent transverse deck panel joints, and two other specimens represent longitudinal joints in deck-bulb tee girders (DBTs). Results and discussions of the tests are presented.

Presenters:

 

 

Mohamed A. Moustafa, Ph.D., P.E.
Assistant Professor
Civil and Environmental Engineering Department
University of Nevada, Reno

 

Mohamed Abokifa, Ph.D. Student
 (Ph.D., Summer 2021, UNR)
Civil and Environmental Engineering Department
University of Nevada, Reno

Presentation Graphics:

Figure 1. Test matrix

Figure 2. Dimensions and design details of the transverse specimens

Figure 3. Test setup of the transverse specimens: (a) schematic drawing of setup, and (b) photograph of actual setup at UNR

Figure 4. Summary of results

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 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.