Earthquakes and Structures

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Seismic fragility analysis of corroded RC pier strengthened by engineered cementitious composites

  • Yan Liang (School of Civil Engineering, Zhengzhou University) ;
  • Jing-Xiao Shu (School of Civil Engineering, Zhengzhou University) ;
  • Cheng-Xin Zhao (School of Civil Engineering, Zhengzhou University) ;
  • Xi Dong Wang (School of Civil Engineering, Zhengzhou University) ;
  • Guang Yu Yang (Wsgri Engineering & Surveying Incorporation Limited)
  • Received : 2023.04.28
  • Accepted : 2024.02.26
  • Published : 2024.04.25
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Abstract

When a reinforced concrete (RC) structure is exposed to a corrosive environment for an extended period of time, the material qualities deteriorate, resulting in a loss in seismic performance. Engineered Cementitious Composites (ECC) have been used to reinforce the corroded RC structure, which can achieve reinforcement effectiveness for a small change in cross-section size. In this work, finite element models of unjacketed RC pier and ECC jacketed pier were established and verified by experimental tests, with the buckling effect of longitudinal reinforcement considered. Compared with the unjacketed pier, the displacement of the pier top of the ECC jacketed pier was reduced by about 9.52% under earthquake action. In the case of moderate and major earthquakes, the probability of exceedance of ECC jacketed pier is significantly reduced. For the case of rare earthquake loading, with the ECC jacket, the e of the pier experiencing serious damage and complete damage states is reduced by 10.29% and 29.78%, respectively.

Keywords

Acknowledgement

The authors are grateful for the financial support from the National Natural Science Foundation of China (52308220).

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