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Title |
Study on Factors Affecting on Energy Dissipation Coefficient of Reinforced Concrete Wall with Deformation-Dominated Behavior
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Authors |
유석형(Suk-Hyeong Yoo) ; 강대영(Dae-Young Kang) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.5.38 |
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Keywords |
철근콘크리트 벽체; 성능기반 내진설계; 비선형해석모델; 에너지소산능력; 에너지소산계수 Reinforced concrete wall; Performance based Seismic design; Nonlinear analysis model; Energy dissipation capacity; Energy dissipation coefficient |
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Abstract |
In Korea, more than 60% of the population lives in apartment buildings with wall structures that exhibit brittle behavior during earthquakes.
Therefore, in recent performance-based seismic design, the selection of the energy dissipation coefficient for reinforced concrete (RC) walls in nonlinear dynamic analysis is very important. Previous experimental studies have reported that the main factors affecting the energy dissipation capacity of RC walls are the axial force ratio, the spacing of transverse reinforcement of boundary element, and the aspect ratio. The Architectural Institute of Korea and the Korea Concrete Institute proposed a concentrated plastic hinge model and the energy dissipation coefficient for each RC member in the guideline ｢Nonlinear Analysis Model for Performance-Based Seismic Design of Reinforced Concrete Building Structures, 2021.｣ The proposed equation for the energy dissipation coefficient does not include the factors of axial force ratio and spacing of transverse reinforcement of boundary element. The aspect ratio is applied to the flexural plastic model, despite considering shear-dominated behavior. Therefore, it is necessary to examine the effect of the aspect ratio according to the analysis model. In this study, the influence of each factor on the energy dissipation coefficient was analyzed by comparing the results of existing experimental research, nonlinear analysis using the fiber element model of a nonlinear analysis program(Perform 3D), and the energy dissipation coefficient proposed in the guideline. As the axial force ratio increased, the energy dissipation coefficient decreased, and as the spacing of transverse reinforcement of boundary element decreased, the energy dissipation coefficient increased. Additionally, as the aspect ratio increased, the energy dissipation coefficient tended to increase, with the aspect ratio showing the greatest influence.
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