Experimental Study on Seismic Performance of Precast Columns Repaired with CFRP Fabrics

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022-11
Major/Subject
Mcode
Degree programme
Language
en
Pages
17
Series
Materials, Volume 15, issue 21
Abstract
Earthquakes worldwide highlight the seismic vulnerability of reinforced concrete (RC) bridge columns. RC bridges are likely to collapse or lose service function due to damage to the bridge columns from strong earthquakes. Rapid repair of RC bridge columns is of great significance for maintaining traffic lines for emergency rescue work after earthquakes. In this study, an improved rapid repair method was developed to restore the bearing capacity of a damaged precast column after earthquake damage. A cyclic loading test was performed to simulate the seismic loading. The original column and the repaired column were both tested. The test results showed that the bearing capacity of the repaired columns was increased by 8%, and the energy dissipation capacity was 53% higher than that of the original column. The ductility decreased because the test for the repaired specimen ended in advance. The initial stiffness of the repaired columns was reduced, but the stiffness was significantly developed in the later loading stage. The rapid repair method proposed in this study exhibited an excellent effect on restoring the seismic resistance of the damaged columns.
Description
Funding Information: This research was funded by the Shaanxi Province Science and Technology Department, grant number 2022JZ-32, and Chang’an University, grant number 300102212212. This paper was written during the academic visit of the second author to Aalto University in Finland, financially supported by the China Scholarship Council. Publisher Copyright: © 2022 by the authors.
Keywords
CFRP fabrics, cyclic load, precast column, rapid repair, seismic performance
Other note
Citation
Liu , L , Lei , S , Wu , F , Lin , W , Peng , K & Fan , X 2022 , ' Experimental Study on Seismic Performance of Precast Columns Repaired with CFRP Fabrics ' , Materials , vol. 15 , no. 21 , 7443 . https://doi.org/10.3390/ma15217443