Low-Damage Posttensioned Segmental Bridge Columns with Flexible End Joints for Seismic Accelerated Bridge Construction

2016 ◽  
Vol 2592 (1) ◽  
pp. 151-161 ◽  
Author(s):  
Mohammad T. Nikoukalam ◽  
Petros Sideris
Keyword(s):  
Bridge Columns ◽  
Accelerated Bridge Construction ◽  
Bridge Construction ◽  
Segmental Bridge

scholarly journals Durable Bridge Columns using Stay-In-Place UHPC Shells for Accelerated Bridge Construction

2019 ◽  
Vol 4 (2) ◽  
pp. 25 ◽  
Author(s):  
Nerma Caluk ◽  
Islam Mantawy ◽  
Atorod Azizinamini
Keyword(s):  
High Performance Concrete ◽  
Plastic Hinge ◽  
Main Idea ◽  
Protective Layer ◽  
Bridge Columns ◽  
Technical Note ◽  
Accelerated Bridge Construction ◽  
Bridge Construction ◽  
Construction Time ◽  
Normal Concrete

Ultra-high performance concrete (UHPC) is a durable material that allows the construction of innovative structural elements and conforms with accelerated bridge construction (ABC) goals. The main idea of this research is to utilize UHPC to prefabricate a shell that acts as a stay-in-place form for bridge columns. The prefabricated shell eliminates the conventional formwork while reducing the on-site construction time and acting as a durable protective layer for the normal concrete inside the shell against environmental attacks. In addition, the UHPC shell provides additional confinement to the column concrete, which improves the column’s structural performance. During construction and after completing the column reinforcement work onsite, based on the conventional construction methods, the prefabricated UHPC shell is placed around the column reinforcement, followed by casting a portion of UHPC for a column-to-footing connection, which improves the capacity of the connection and shifts the plastic hinge zone above the connection. Once the UHPC portion hardens, normal concrete is placed inside the shell, forming a permanent concrete-filled UHPC shell. The construction process is finalized by placing and connecting a prefabricated cap beam to the column through the same developed connection as that in this research. This technical note presents the development of two test specimens using an UHPC shell in lieu of a conventional formwork with the advantage of improving the column performance and durability.

Accelerated bridge construction in Washington State: From research to practice

PCI Journal ◽  
2012 ◽  
Vol 57 (4) ◽  
pp. 34-49 ◽  
Author(s):  
Bijan Khaleghi ◽  
Eric Schultz ◽  
Stephen Seguirant ◽  
Lee Marsh ◽  
Olafur Haraldsson ◽  
...  
Keyword(s):  
Washington State ◽  
Accelerated Bridge Construction ◽  
Research To Practice ◽  
Bridge Construction
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