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Seismic fragility analysis of lap-spliced reinforced concrete columns retrofitted by SMA wire jackets

Title
Seismic fragility analysis of lap-spliced reinforced concrete columns retrofitted by SMA wire jackets
Authors
Choi E.Park S.-H.Chung Y.-S.Kim H.S.
Ewha Authors
김희선
SCOPUS Author ID
김희선scopus
Issue Date
2013
Journal Title
Smart Materials and Structures
ISSN
0964-1726JCR Link
Citation
vol. 22, no. 8
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The aim of this study is to provide seismic fragility curves of reinforced concrete columns retrofitted by shape memory alloy wire jackets and thus assess the seismic performance of the columns against earthquakes, comparing them with reinforced concrete columns with lap-spliced and continuous reinforcement. For that purpose, this study first developed analytical models of the experimental results of the three types of columns, (1) lap-spliced reinforcement, (2) continuous reinforcement and (3) lap-spliced reinforcement and retrofitted by SMA wire jackets, using the OpenSEES program, which is oriented to nonlinear dynamic analysis. Then, a suite of ten recorded ground motions was used to conduct dynamic analyses of the analytical models with scaling of the peak ground acceleration from 0.1g to 1.0g in steps of 0.1g. From the static experimental tests, the column retrofitted with SMA wire jackets had a larger displacement ductility by a factor of 2.3 times that of the lap-spliced column, which was 6% larger compared with the ductility of the continuous reinforcement column. From the fragility analyses, the SMA wire jacketed column had median values of 0.162g and 0.567g for yield and collapse, respectively. For the yield damage state, the SMA wire jacketed column had a median value similar to the continuous reinforcement column. However, for the complete damage state, the SMA wire jacketed column showed a 1.33 times larger median value than the continuously reinforcement column. © 2013 IOP Publishing Ltd.
DOI
10.1088/0964-1726/22/8/085028
Appears in Collections:
엘텍공과대학 > 건축공학전공 > Journal papers
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