Bearing capacity and seismic performance of Y-shaped reinforced concrete bridge piers in a freeze-thaw environment

A quantitative study is performed to determine the performance degradation of Y-shaped reinforced concrete bridge piers owing to long-term freeze-thaw damage. The piers are discretized into spatial solid elements using the ANSYS Workbench finite element analysis software, and a spatial model is esta...

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Bibliographic Details
Published in:Archives of civil engineering 2023-01, Vol.69 (1), p.367-384
Main Authors: Li, Yanfeng, Li, Jialong, Guo, Tianyu, Zhao, Tongfeng, Bao, Longsheng, Sun, Xinglong
Format: Article
Language:English
Subjects:
Axial compression
Bearing (direction)
Bearing capacity
Bridge loads
Bridge piers
Compression ratio
Concrete bridges
Cycle ratio
Ductility
Earthquake damage
finite element analysis
Finite element method
Freeze thaw cycles
freeze-thaw cycle
Freeze-thaw durability
Mechanical properties
Peak load
Performance degradation
Performance indices
Piers
Quantitative research
Reinforced concrete
Repeated loading
Seismic activity
seismic resistance
Seismic response
y-shaped bridge pier
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Summary:A quantitative study is performed to determine the performance degradation of Y-shaped reinforced concrete bridge piers owing to long-term freeze-thaw damage. The piers are discretized into spatial solid elements using the ANSYS Workbench finite element analysis software, and a spatial model is established. The analysis addresses the mechanical performance of the piers under monotonic loading, and their seismic performance under low-cycle repeated loading. The influence of the number of freeze-thaw cycles, axial compression ratio, and loading direction on the pier bearing capacity index and seismic performance index is investigated. The results show that freeze-thaw damage has an adverse effect on the ultimate bearing capacity and seismic performance of Y-shaped bridge piers in the transverse and longitudinal directions. The pier peak load and displacement ductility coefficient decrease with increasing number of freeze-thaw cycles. The axial compression ratio is an important factor that affects the pier ultimate bearing capacity and seismic performance. Upon increasing the axial compression ratio, the pier peak load increases and the displacement ductility coefficient decreases, the effects of which are more significant in the longitudinal direction.
ISSN:1230-2945
2300-3103
DOI:10.24425/ace.2023.144178