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

被引:13
作者
Choi, Eunsoo [1 ]
Park, Sun-Hee [1 ]
Chung, Young-Soo [2 ]
Kim, Hee Sun [3 ]
机构
[1] Hongik Univ, Dept Civil Engn, Seoul 121791, South Korea
[2] Chung Ang Univ, Dept Civil Engn, Seoul 156756, South Korea
[3] Ewha Womans Univ, Dept Architectural Engn, Seoul 120750, South Korea
基金
新加坡国家研究基金会;
关键词
SHAPE-MEMORY ALLOYS; BEHAVIOR;
D O I
10.1088/0964-1726/22/8/085028
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
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.
引用
收藏
页数:11
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