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Title |
Effect of Yield Strength of Longitudinal Reinforcement and Connection Method on Ductility of Precast Lightweight Aggregate Concrete Shear Walls
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Authors |
김윤정(Yun-Jeong Kim) ; 문주현(Ju-Hyun Mun) |
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DOI |
https://doi.org/10.4334/JKCI.2024.36.5.493 |
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Keywords |
전단벽; 경량골재 콘크리트; 휨 연성; 변위연성비 shear wall; lightweight aggregate concrete; flexural ductility; displacement ductility ratio |
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Abstract |
This study examined the ductility performance of precast lightweight aggregate concrete (PLC) shear walls and proposed a calibration factor (ξ) relating to equivalent concepts. The main parameters investigated were the methods of wall-to-base connection and the yield strength (fy) of longitudinal reinforcing bars in boundary elements. All PLC shear wall specimens were tested under constant axial load and cyclic lateral loads. The test results showed that PLC shear walls designed with a lower yield strength and connected using bolts, rather than the conventional spliced sleeve method, exhibited higher displacement ductility ratios (μΔ) and cumulative work damage indicators. To achieve ductility equivalent to that of precast concrete (PC) shear walls made of normal-weight concrete, a simplified model was proposed. For PCL shear walls designed with a yield strength of 600 MPa, it was recommended that the transverse reinforcing bar ratio (Ash) in boundary elements be 2.31 times greater than the minimum amount specified in KDS 14 20 00.
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