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Title |
Effect of Concrete Density on Plastic Hinge Length of Shear Walls
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DOI |
https://doi.org/10.4334/JKCI.2023.35.5.505 |
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Keywords |
콘크리트 밀도; 소성힌지길이; 전단벽; 하중-변위 관계 concrete density; plastic hinge length; shear walls; lateral load-displacement relationship |
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Abstract |
The objective of this study was to examine the influence of concrete density (ρc) on the equivalent plastic hinge length (lp) of shear walls and to propose a rational predictive model. The plastic hinge length of shear walls was calculated based on both yield and maximum moment capacities, along with additional moments resulting from shear forces. A simplified closed-form equation was then derived through regression analysis, using calculated lp values obtained from a comprehensive parametric study. The proposed lp model was validated by comparing the lateral load-displacement relationships of shear walls predicted by the plastic hinge analysis using the one-dimensional section lamina method and two-dimensional non-linear analysis with results from previous tests. Additionally, the predictive capabilities of the model were assessed by comparing its predictions to test results compiled from prior studies involving shear walls of different concrete densities. The load-displacement relationships obtained through the plastic hinge analysis using the proposed lp model consistently matched the experimental results, regardless of the ρc. Moreover, the predicted lp values were in good agreement with the test results, as evidenced by mean, standard deviation, and coefficient of variation ratios between experiments and calculations of 0.99, 0.07, and 0.07, respectively.
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