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Title |
Seismic Performance Evaluation of Full-size Two-story R/C Frame Strengthened with Concrete Wingwall with Embedded Kagome Truss by Pseudo-dynamic Test
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Authors |
김규익(Kyu-Ik Kim) ; 정주성(Ju-Seong Jung) ; 이복기(Bok-Gi Lee) ; 이강석(Kang-Seok Lee) |
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DOI |
https://doi.org/10.4334/JKCI.2020.32.2.173 |
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Keywords |
카고메트러스; 철근콘크리트; 유사동적 실험; 날개벽; 내진보강 Kagome truss; reinforced concrete; pseudo-dynamic; wingwall; seimsic strengthenning |
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Abstract |
A wire-woven bulk Kagome truss was recently developed. The Kagome truss, a periodic cellular metal type, is composed of evenly distributed helical wires with a constant pitch and helical radius in six directions. In this study, a new seismic strengthening method by attaching a concrete wingwall panel with embedded Kagome truss (Kagome Concrete Panel) was proposed for strengthening medium-to-low-rise reinforced concrete buildings. The method is one of the strength design approach by retrofit which can easily increase the ultimate lateral-load capacity of R/C buildings controlled by shear. Two full-size two-story reinforced concrete frames based on the existing school building without seismic details in Korea were designed and fabricated for the structural test. The pseudo-dynamic test was carried out in order to verify the seismic strengthening effects of the proposed method in terms of the maximum load carrying capacity and ductility. Test results revealed that the proposed Kagome Concrete Panel strengthening method installed in reinforced concrete frame enhanced conspicuously the strength and displacement capacities, and the method can resist markedly under the large scaled earthquake intensity level.
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