Earthquakes and Structures

  • 제4권6호
  • /
  • Pages.607-627
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  • 2013
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Loading rate effect on superelastic SMA-based seismic response modification devices

  • Zhu, Songye (The Hong Kong Polytechnic University Shenzhen Research Institute) ;
  • Zhang, Yunfeng (Department of Civil and Environmental Engineering, University of Maryland)
  • 투고 : 2012.02.10
  • 심사 : 2013.01.03
  • 발행 : 2013.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

The application of shape memory alloys (SMAs) to the seismic response reduction of civil engineering structures has attracted growing interest due to their self-centering feature and excellent fatigue performance. The loading rate dependence of SMAs raises a concern in the seismic analysis of SMA-based devices. However, the implementation of micromechanics-based strain-rate-dependent constitutive models in structural analysis software is rather complicated and computationally demanding. This paper investigates the feasibility of replacing complex rate-dependent models with rate-independent constitutive models for superelastic SMA elements in seismic time-history analysis. Three uniaxial constitutive models for superelastic SMAs, including one rate-dependent thermomechanical model and two rate-independent phenomenological models, are considered in this comparative study. The pros and cons of the three nonlinear constitutive models are also discussed. A parametric study of single-degree-of-freedom systems with different initial periods and strength reduction factors is conducted to examine the effect of the three constitutive models on seismic simulations. Additionally, nonlinear time-history analyses of a three-story prototype steel frame building with special SMA-based damping braces are performed. Two suites of seismic records that correspond to frequent and design basis earthquakes are used as base excitations in the seismic analyses of steel-braced frames. The results of this study show that the rate-independent constitutive models, with their parameters properly tuned to dynamic test data, are able to predict the seismic responses of structures with SMA-based seismic response modification devices.

키워드

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피인용 문헌

  1. Performance-based seismic design of self-centering steel frames with SMA-based braces vol.130, 2017, https://doi.org/10.1016/j.engstruct.2016.09.051
  2. Feasibility study of utilizing superelastic shape memory alloy plates in steel beam–column connections for improved seismic performance vol.26, pp.4, 2015, https://doi.org/10.1177/1045389X14529032
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  7. Controlling Residual Drift in BRBFs by Combining SCCBFs in Parallel vol.32, pp.4, 2018, https://doi.org/10.1061/(ASCE)CF.1943-5509.0001191
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  10. Numerical analysis of hysteretic behavior for RAC structure under earthquake loading vol.18, pp.4, 2019, https://doi.org/10.1080/13467581.2019.1645671
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