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Title |
Nonlinear Dynamic Response of Asymmetric Reinforced Concrete Members Subjected to Axial and Blast Load
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Authors |
임태훈(Tae-Hun Lim) ; 문선영(Sun-Young Moon) ; 최가은(Ga-Eun Choe) ; 이승훈(Seung-Hoon Lee) ; 김한수(Han-Soo Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.5.627 |
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Keywords |
SDOF 해석; 비대칭 단면; 축하중; 폭발하중; 철근콘크리트 부재 SDOF analysis; asymmetric cross-section; axial load; blast load; reinforced concrete member |
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Abstract |
This study presents a single degree of freedom analysis procedure for reinforced concrete members with asymmetric rebar layout subjected to axial and blast loads using the OpenSees program. The nonlinear dynamic responses of symmetric and asymmetric RC columns were compared with experimental results to verify the accuracy of the proposed method. Sectional analysis of a representative example showed that when subjected to 10 % of the maximum axial load, the flexural strength of the asymmetric section increased by 1.2 times compared to the symmetric section. Blast analysis results indicated that as plastic deformation increased, the difference in dynamic response between symmetric and asymmetric sections also increased, reaching up to 36.8 %. This study presents a method to improve the blast performance of reinforced concrete columns without increasing the cost, and can be utilized as an efficient design method for performance-based blast design in the future.
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