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

Laijun Liu, Song Lei*, Fangwen Wu, Weiwei Lin, Kai Peng, Xiangyan Fan

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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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.

Original languageEnglish
Article number7443
Number of pages17
JournalMaterials
Volume15
Issue number21
DOIs
Publication statusPublished - Nov 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • CFRP fabrics
  • cyclic load
  • precast column
  • rapid repair
  • seismic performance

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