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Title |
Evaluation of Axial Compressive Performance of Section Enlargement Strengthening Columns with Supplementary V-ties and V-clips in the Jacket Section
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Authors |
황용하(Yong-Ha Hwang) ; 양근혁(Keun-Hyeok Yang) ; 심재일(Jae-Il Sim) ; 최용수(Yong-Soo Choi) |
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DOI |
https://doi.org/10.4334/JKCI.2019.31.5.429 |
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Keywords |
단면확대 보강 기둥; 보조V-타이; V-클립; 축강도; 축연성 section enlargement strengthening columns; supplementary V-tie; V-clip; axial strength; axial ductility |
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Abstract |
The objective of the present study is to examine the significance and limitation of a V-clip developed to prevent the opening of overlapped channel-type hoops in the jacket section of section enlargement strengthening columns. Five full-scale columns were tested under concentric axial loads. Test results revealed that, until ultimate failure of strengthed columns, no opening of the overlapped legs of the channel-type hoops and supplementary V-ties was observed in the jacket section with the developed V-ties and V-clips. The axial ductility ratios of the strengthened columns with V-ties and V-clips were as much as 1.66 times higher when compared with that measured in the existing non-seismic column. In addition, the strengthened columns with V-ties and V-clips exhibited 1.42 times higher axial ductility than those of counterpart columns without V-clips of the same details. Overall, the proposed supplementary V-ties and V-clips possess the potential to enhance the ductility of section enlargement strengthening columns, satisfying the seismic design details of code provision in the jacket section.
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