Seismic performance of Fe-SMA prestressed segmental bridge columns with 3D printed permanent concrete formwork
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Date
2024-03
Publication Type
Journal Article
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Abstract
The integration of digital fabrication technology with prestressed segmental column construction offers significant potential for accelerated bridge construction with material-efficient design. This study aims to explore this potential by developing a novel prestressed segmental column system that utilizes permanent 3D printed concrete (3DPC) formwork for column segment fabrication. Prestressing is achieved in the proposed system by using partially bonded iron-based shape memory alloy (Fe-SMA) reinforcement. Large-scale experiments were conducted on two columns under combined gravity and lateral loading to evaluate the seismic performance and feasibility of the proposed system. The ratio of steel to Fe-SMA reinforcement in the column design was the variable considered in this study. The experimental results showed that the columns could withstand lateral drifts of up to 5% without collapse and the permanent 3DPC formwork showed no premature failure or delamination. Furthermore, the columns exhibited self-centering characteristics, maintaining a residual drift of 1% up to a target drift of 4% when the reinforcement ratio of steel to Fe-SMA rebars was 0.3. The results highlight the potential of the proposed prefabrication concept in designing material-efficient and seismically resilient bridge columns with low damage characteristics.
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published
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Journal / series
Volume
302
Pages / Article No.
117423
Publisher
Elsevier
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Edition / version
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Date collected
Date created
Subject
Accelerated bridge construction; Prefabricated segmental columns; Self-centering seismic behavior; 3D printed concrete formwork; Shape memory alloy prestressing
Organisational unit
09566 - Dillenburger, Benjamin / Dillenburger, Benjamin
02284 - NFS Digitale Fabrikation / NCCR Digital Fabrication