Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/79794
Title: Seismic behavior of self-centering reinforced concrete wall enabled by superelastic shape memory alloy bars
Authors: Wang, B 
Zhu, SY 
Keywords: Reinforced concrete wall
Superelastic shape memory alloy
Self-centering
Energy dissipation
Flag-shaped hysteretic loop
Issue Date: 2018
Publisher: Springer
Source: Bulletin of earthquake engineering, Jan. 2018, v. 16, no. 1, p. 479-502 How to cite?
Journal: Bulletin of earthquake engineering 
Abstract: Reinforced concrete (RC) wall is a common type of structural component used in high-rise buildings to resist lateral loads induced by earthquakes. RC walls are typically designed and detailed to dissipate energy through significant inelastic responses to meet expected seismic performance under moderate-to-strong earthquakes. However, costly repair or even demolition caused by excessive residual deformation is usually inevitable. Given this deficiency, this study investigates the feasibility of utilizing superelastic shape memory alloy (SMA) bars to achieve self-centering (SC) RC walls. Under this condition, the residual deformation of SC-RC walls is reduced by superelastic SMA with large recoverable strain and remarkable fatigue properties. The mechanical properties of superelastic nickel-titanium bars and SC-RC wall design are described. A numerical SC-RC wall model is developed and validated by comparing the test results. Parametric studies of SC-RC wall systems are then conducted to investigate the effects of axial compressive load ratio, bottom slit length, and lower plateau stress factor of SMA. Results show that the proposed SC-RC walls have excellent SC ability and moderate energy dissipation capacity. The damage regions and levels of the SC-RC wall systems are also discussed.
URI: http://hdl.handle.net/10397/79794
ISSN: 1570-761X
DOI: 10.1007/s10518-017-0213-8
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