Bruno 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

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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 Montreal

Mr. 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

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