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Title |
Evaluation on Flexural Behavior of Shear Walls Seismically Strengthened with Jacket Section Method Using Prestressed Wire Ropes
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Authors |
권혁진(Hyuck-Jin Kwon) ; 양근혁(Keun-Hyeok Yang) ; 변항용(Hang-Yong Byun) |
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DOI |
https://doi.org/10.4334/JKCI.2017.29.5.483 |
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Keywords |
전단벽 ; 보강 ; 단면확대 ; 와이어로프 ; 휨 거동 shear wall ; strengthening ; jacket section ; wire rope ; flexural performance |
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Abstract |
This study proposed a jacket section method using prestressed wire ropes to enhance the flexural performance of non-seismic shear walls. The jacket section is composed of longitudinal reinforcing bars, prestressed wire ropes used for an external hoop, and a mortar cover, which produce the seismic boundary elements at both ends of walls. To examine the advantage and limitation of the proposed strengthening method, four wall specimens with different spacings of wire ropes were tested under constant axial loads and reversal cyclic lateral loads. Test results showed that the flexural strength and displacement ductility ratio of strengthened walls were higher by averagely 1.93 times and 1.18 times, respectively, than those of the companion unstrengthened wall. Furthermore the work damage indicator of strengthened walls with wire rope spacing of 60 mm and 90 mm was higher as much as 3.95 times and 2.36 times than that of the unstrengthened wall. The backbone curves obtained from measured cyclic lateral load-displacement relationships of wall specimens were in good agreement with the predictions determined from the non-linear analysis approach for the inherently seismic shear walls proposed by Mun.
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