Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5861
Title: Loading rate effect on superelastic SMA-based seismic response modification devices
Authors: Zhu, S 
Zhang, Y
Keywords: Shape memory alloy
Superelasticity
Loading rate effect
Damper
Constitutive model
Issue Date: Jun-2013
Publisher: Techno Press
Source: Earthquake and structures, June 2013, v. 4, no. 6, p. 607-627 How to cite?
Journal: Earthquakes and structures 
Abstract: 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.
URI: http://hdl.handle.net/10397/5861
ISSN: 2092-7614
EISSN: 2092-7622
DOI: 10.12989/eas.2013.4.6.607
Rights: © 2013 Techno Press
Appears in Collections:Journal/Magazine Article

Files in This Item:
File Description SizeFormat 
EnS Loading rate effect of SMA model.pdfPre-published version624.09 kBAdobe PDFView/Open
Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

3
Last Week
0
Last month
0
Citations as of Sep 10, 2017

WEB OF SCIENCETM
Citations

3
Last Week
0
Last month
0
Citations as of Sep 14, 2017

Page view(s)

347
Last Week
1
Last month
Checked on Sep 18, 2017

Download(s)

352
Checked on Sep 18, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.