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Title |
Ductility Evaluation of Heavyweight Concrete Shear Walls with Wire Ropes as a Lateral Reinforcement
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Authors |
문주현(Ju-Hyun Mun) ; 양근혁(Keun-Hyeok Yang) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.3.207 |
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Keywords |
전단벽 ; 경계요소 ; 곡률연성비 ; 변위연성비 ; 와이어로프 shear wall ; boundary element ; curvature ductility ratio ; displacement ductility ratio ; wire rope |
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Abstract |
This study examined the feasibility of wire ropes as lateral reinforcement at the boundary element of heavyweight concrete shear walls. The spacing of the wire ropes varied from 60 mm to 120 mm at an interval of 30 mm, which produces the volumetric index of the lateral reinforcement of 0.126~0.234. The wire ropes were applied as a external hoop and/or internal cross-tie. Five shear wall specimens were tested to failure under constant axial load and cyclic lateral loads. Test results showed that with the increase of the volumetric index of the lateral reinforcement, the ductility of shear walls tended to increase, whereas the variation of flexural capacity of walls was minimal. The flexural capacity of shear walls tested was slightly higher than predictions determined from ACI 318-11 procedure. The displacement ductility ratio of shear walls with wire ropes was higher than that of shear wall with the conventional mild bar at the same the volumetric index of the lateral reinforcement. In particular, the shear walls with wire rope index of 0.233 achieved the curvature ductility ratio of more than 16 required for high-ductility design.
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