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Rapid repair of severely earthquake-damaged bridge piers with flexural-shear failure mode

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Abstract

An experimental study was conducted to investigate the feasibility of a proposed rapid repair technique for severely earthquake-damaged bridge piers with flexural-shear failure mode. Six circular pier specimens were first tested to severe damage in flexural-shear mode and repaired using early-strength concrete with high-fluidity and carbon fiber reinforced polymers (CFRP). After about four days, the repaired specimens were tested to failure again. The seismic behavior of the repaired specimens was evaluated and compared to the original specimens. Test results indicate that the proposed repair technique is highly effective. Both shear strength and lateral displacement of the repaired piers increased when compared to the original specimens, and the failure mechanism of the piers shifted from flexural-shear failure to ductile flexural failure. Finally, a simple design model based on the Seible formulation for post-earthquake repair design was compared to the experimental results. It is concluded that the design equation for bridge pier strengthening before an earthquake could be applicable to seismic repairs after an earthquake if the shear strength contribution of the spiral bars in the repaired piers is disregarded and 1.5 times more FRP sheets is provided.

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Authors and Affiliations

  1. Institute of Road and Bridge Engineering, Dalian Maritime University, Dalian, 116026, China

    Zhiguo Sun & Dongsheng Wang

  2. Key Laboratory of Urban Security and Disaster Engineering of China Ministry of Education, Beijing University of Technology, Beijing, 100124, China

    Xiuli Du

  3. School of Civil Engineering, Dalian University of Technology, Dalian, 116024, China

    Bingjun Si

  4. Institute of Road and Bridge Engineering, Dalian Maritime University, 1 Linghai Road, Dalian, 116026, China

    Dongsheng Wang

Authors
  1. Zhiguo Sun
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  2. Dongsheng Wang
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  3. Xiuli Du
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  4. Bingjun Si
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Corresponding author

Correspondence to Dongsheng Wang.

Additional information

Supported by: National Natural Science Foundation of China Under Grant No. 51008041 and 50978042; the National Special Foundation of Earthquake Science of China Under Grant No. 200808021; the Fundamental Research Funds for the Central Universities Under Grant No. 22011JC011

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Sun, Z., Wang, D., Du, X. et al. Rapid repair of severely earthquake-damaged bridge piers with flexural-shear failure mode. Earthq. Eng. Eng. Vib. 10, 553–567 (2011). https://doi.org/10.1007/s11803-011-0089-6

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  • DOI: https://doi.org/10.1007/s11803-011-0089-6

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