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Author:

Jiang, Tianyuan (Jiang, Tianyuan.) | Qiu, Canxing (Qiu, Canxing.) (Scholars:邱灿星) | Liu, Jiawang (Liu, Jiawang.) | Du, Xiuli (Du, Xiuli.) | Liu, Hang (Liu, Hang.)

Indexed by:

Scopus SCIE

Abstract:

In seismic prone regions, many old bridges deserve retrofitting measures to improve their seismic resilience. The recently proposed buckling-restrained shape memory alloy (SMA) dampers, which can maintain axial resistance under low temperatures, are potential candidates for outdoor applications. However, the corresponding design method and retrofitting efficacy remain unknown. Besides, the effects arising from temperature variations and device uncertainty have not been addressed. To this end, this work proposes a performance-based retrofitting method and conducts a probabilistic evaluation for bridges retrofitted with buckling-restrained SMA dampers. The temperature-specific behavior of the damper is first described, and then a triple-column bent bridge located in Salt Lake City is selected for demonstration purposes. To unveil the seismic retrofitting efficacy, nonlinear time history analysis and fragility analysis are performed. The considered uncertainties include temperature variation, device uncertainty, and seismic intensity. The results indicate that the bridges retrofitted by the designed damper could achieve prescribed performance targets. In addition, with the variations of temperature and device, the seismic response demands are relatively stable. The damage probabilities and seismic risk are reduced by the installed dampers. Hence, the buckling-restrained SMA dampers have a reliable seismic control efficacy for bridges.

Keyword:

Seismic retrofit Shape memory alloy Bridges Temperature effect Multivariate fragility

Author Community:

  • [ 1 ] [Jiang, Tianyuan]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Qiu, Canxing]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Liu, Jiawang]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Du, Xiuli]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 5 ] [Liu, Hang]Beijing Bldg Construct Res Inst Co Ltd, Beijing 100039, Peoples R China

Reprint Author's Address:

  • 邱灿星

    [Qiu, Canxing]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China

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Source :

JOURNAL OF BRIDGE ENGINEERING

ISSN: 1084-0702

Year: 2025

Issue: 5

Volume: 30

3 . 6 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 10

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