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Author:

Qiu, Canxing (Qiu, Canxing.) (Scholars:邱灿星) | Du, Xiuli (Du, Xiuli.) (Scholars:杜修力) | Teng, Jun (Teng, Jun.) | Li, Zuohua (Li, Zuohua.) | Chen, Cheng (Chen, Cheng.)

Indexed by:

EI Scopus SCIE

Abstract:

Superelastic shape memory alloys (SMAs) can recover large inelastic deformation meanwhile dissipating energy under loading reversals. This property makes them an attractive alternative for developing structures with desirable self-centering (SC) capability. For SMA braced frames (SMABFs), which have not been codified in current seismic provisions, their deformation demand under earthquakes needs to be estimated with confidence in the phase of seismic design, retrofit or upgrade. In this work, the inelastic displacement ratio, i.e. CR, is explored to address current issue. The fundamental behavior of SMABFs is understood by analyzing the equivalent single-degree-of-freedom (SDOF) systems, with the purpose of evaluating and discussing the influence of fundamental period (T), strength reduction ratio (R) and hysteretic parameters of systems (including the secondary stiffness ratio alpha and the hysteresis width beta) on CR. The regression of CR is further conducted to be a function of T, R, alpha, and beta. Subsequently, a CR-based seismic design procedure is developed for multi-story SMABFs. Two frame structures of 3 and 6 stories are utilized to verify the proposed design procedure. The seismic analysis results indicate that the mean responses of designed structures agree well with prescribed performance targets. Although SMABFs are focused in this study, the proposed method could also shed light on the other types of SC structures.

Keyword:

Shape memory alloy Seismic design Inelastic displacement ratio Braced frame

Author Community:

  • [ 1 ] [Qiu, Canxing]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Du, Xiuli]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Teng, Jun]Harbin Inst Technol, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China
  • [ 4 ] [Li, Zuohua]Harbin Inst Technol, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China
  • [ 5 ] [Chen, Cheng]San Francisco State Univ, Sch Engn, San Francisco, CA 94132 USA

Reprint Author's Address:

  • [Chen, Cheng]San Francisco State Univ, Sch Engn, San Francisco, CA 94132 USA

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Source :

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING

ISSN: 0267-7261

Year: 2021

Volume: 147

4 . 0 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:87

JCR Journal Grade:2

Cited Count:

WoS CC Cited Count: 29

SCOPUS Cited Count: 33

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 9

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