Events in January 2025
-
Seismic Connections of Precast Columns Utilizing UHPC Seismic Connections of Precast Columns Utilizing UHPC
–
January 16, 2025Bruno Massicotte, Ph.D, P.Eng., Professor, Department of Civil, Geological and Mining Engineering, Polytechnique Montreal; Dominic Vachon, P.Eng., MASc., Head of Bridge and Tunnel Department, City of Montreal
Earn 1-hour Certificate of Attendance (https://abc-utc.fiu.edu/webinars/certificates-of-attendance/)
Announcements: This portion of the IBT/ABC-UTC Monthly Webinar will provide you with the latest happenings related to Innovative Bridge Technologies and ABC in the US and abroad to keep you informed. (10 minutes)
Featured Presentation: Seismic Connections of Precast Columns Utilizing UHPC
Description:
Using precast elements for the construction of bridge piers in moderate to severe seismic zones has been a challenge. An extensive research program aimed at developing fully precast concrete bridge piers offering high seismic performances has been carried out. The exceptional tensile performances of UHPC have been utilized for developing efficient connections between precast elements. The performance of lap splice connections with various configurations involving joints with multiple bars were considered, both experimentally and numerically. This enabled developing a design approach for precast bridge piers that was validated on large-scale specimens and which exhibited performances exceeding those of cast-in-place construction. The presentation will follow the design process, from the basic principles of reinforcement lap splice using UHPC, to the strategy for designing plastic hinge regions using this technique. The experimental and numerical validation of the various design steps will be presented. The construction of a fully precast bridge pier using the developed technique in Montreal will conclude the presentation.Presenters:
Professor Bruno Massicotte, P.Eng., PhD
Department of Civil, Geological and Mining Engineering
Polytechnique Montreal, Montreal (QC)Bruno Massicotte is Full Professor in the Department of Civil, Geological and Mining Engineering at Polytechnique de Montréal. After his studies, Dr. Massicotte joined the Quebec Ministry of Transportation Bridge Department for two years and then began an academic career at Polytechnique Montréal in 1990. His research areas combine experimental and analytical activities and focus mostly on the analysis, design and strengthening of bridges, on the nonlinear finite element analysis of concrete structures, and on the structural use of fiber-reinforced concrete. He is a member of the Canadian Bridge Code CSA-S6 Technical Committee and Chair of this Code Committee on Methods of Analysis.
Dominic Vachon, P.Eng., MASc
Head of Bridge and Tunnel Department
City of MontrealMr. Vachon joined the bridge division of CIMA+ in Montreal where he was involved in bridge design projects. In 2014, he joined the City of Montreal Bridge and Tunnel Department of which he became head in 2020. During his career he has been engaged in maintaining a close relationship in university research projects and in the teaching of bridge design to future engineers. He has a strong interest in technological transfer through pilot projects and contributes to implementing the better practices for building durable infrastructure. He is a member of the Canadian Bridge Code CSA-S6 Subcommittee on Barriers and Highway Accessory Supports
Presentation Photos/Graphics:
1) Figure 1 – Concept for Circular Columns
2) Figure 2 – Lapped Bars in UHPC
3) Figure 3 – Validation of the proposed concept performance of a full scale rectangular column in the 6 DOF loading systems.
4) Figure 4 – Completed fully precast pierQuestion & Answer Period: Submit your questions when you register for the webinar and also in the question box during the webinar. (15 minutes)
Certificate of Attendance: Each site registered for this webinar 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 webinars that were attended by simply clicking the webinar title. Please let Ms. Ankitha Arvan at FIU know if you have questions or need assistance with receiving your certificate. Ankitha’s email address is aarvan@fiu.edu.
For More Information: Please visit our website (abc-utc.fiu.edu) for more information. You can also contact us by sending an email to abc@fiu.edu.
-
Prestress Losses in UHPC and Hybrid Precast, Prestressed Bridge Girders Prestress Losses in UHPC and Hybrid Precast, Prestressed Bridge Girders
–
January 31, 2025In this quarterly IBT/ABC-UTC Research Seminar, Royce Floyd, Ph.D., P.E., S.E., Principal Investigator and Associate Professor of Civil Engineering and Environmental Science, University of Oklahoma; and Omar Yadak, Graduate Research Assistant, School of Civil Engineering and Environmental Science, University of Oklahoma, present work related to the Prestress Losses in UHPC and Hybrid Precast, Prestressed Bridge Girders.
Earn 1-hour Certificate of Attendance (https://abc-utc.fiu.edu/webinars/certificates-of-attendance/)
Description:
Precast, prestressed concrete bridge girders are used extensively in conventional and accelerated bridge construction. End region behavior of prestressed concrete girders has been a significant concern warranting numerous studies over the years focused on stress limits, prestress transfer length, cracking caused by the prestress, and shear capacity. Ultra-high performance concrete (UHPC) is a relatively recent advancement in cementitious composite materials with mechanical and durability properties far exceeding those of conventional concrete. These improved mechanical properties have the potential to mitigate the impacts of high stresses in prestressed girder end regions and to provide greater overall girder capacity. However, little research has been conducted on the behavior of hybrid girders using UHPC in the end region or as a stay-in-place formwork shell. A total of five hybrid, four full UHPC, and two UHPC shell prestressed girder specimens were cast and instrumented to measure prestress losses over time. The results are being used to develop predictions for prestress loss behavior and recommendations for girder end region detailing.Presenters:
Royce W. Floyd, Ph.D., P.E., S.E.
Associate Professor
School of Civil and Environmental Science
University of Oklahoma
Email: rfloyd@ou.eduRoyce Floyd is an Associate Professor in the School of Civil Engineering and Environmental Science at the University of Oklahoma and is an Associate Director of the Southern Plains Transportation Center. His current research focus is on extending the life of transportation infrastructure using innovative concrete materials, such as ultra-high performance concrete and calcium sulfoaluminate cement concrete. He has been PI or Co-PI on more than twenty projects sponsored by ODOT, SPTC, and ABC-UTC, including the first few field projects implementing ultra-high performance concrete in Oklahoma. He is a registered structural engineering in Oklahoma.
Omar Yadak
Ph.D. Student
School of Civil and Environmental Science
University of OklahomaOmar Yadak is a Ph.D. student in structural engineering at the University of Oklahoma. He started his research journey as a senior undergraduate student when he assisted in field monitoring for the first implementation of UHPC for bridge deck panel joints and overlay in Oklahoma during replacement of the Eufaula Spillway Bridge. Omar has been part of several research projects related to UHPC. His master’s research focused on connections for composite columns using UHPC and his Ph.D. research will focus on hybrid conventional concrete/UHPC prestressed concrete beams.
Presentation Graphics:
Figure 1. Beam formwork showing insert to reduce the web thickness and vibrating wire strain gage
Figure 2. UHPC end region cast simultaneously with conventional self-consolidating concrete
Figure 3. Trial UHPC shell to evaluate bond between shell and infill concrete
Figure 4. Failure of trial UHPC shell specimen showing no debonding between the materialsQuestion & 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. Ankitha Arvan at FIU know if you have questions or need assistance with receiving your certificate. Ankitha’s email address is ejuarez@fiu.edu.
For more information: Please contact us by sending an email to abc@fiu.edu.
