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Structural Engineering and Mechanics Volume 75, Number 3, August10 2020 , pages 389-399 DOI: https://doi.org/10.12989/sem.2020.75.3.389 |
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Seismic performance of RC frame structures strengthened by HPFRCC walls |
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Hyun-Do Yun, Jin-Ha Hwang, Mee-Yeon Kim, Seung-Ho Choi, Wan-Shin Park and Kang Su Kim
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| Abstract | ||
| An infill wall made of high-performance fiber-reinforced cementitious composites (HPFRCC) was utilized in this study to strengthen the reinforced concrete (RC) frame structures that had not been designed for seismic loads. The seismic performance of the RC frame structures strengthened by the HPFRCC infill walls was investigated through the experimental tests, and the test results showed that they have improved strength and deformation capabilities compared to that strengthened by the RC infill wall. A simple numerical modeling method, called the modified longitudinal and diagonal line element model (LDLEM), was introduced to consider the seismic strengthening effect of the infill walls, in which a section aggregator approach was also utilized to reflect the effect of shear in the column members of the RC frames. The proposed model showed accurate estimations on the strength, stiffness, and failure modes of the test specimens strengthened by the infill walls with and without fibers. | ||
| Key Words | ||
| seismic performance, infill wall, shear wall, HPFRCC, LDLEM | ||
| Address | ||
| Hyun-Do Yun: Department of Architectural Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea Jin-Ha Hwang, Seung-Ho Choi and Kang Su Kim: Department of Architectural Engineering, University of Seoul, 163 Seoulsiripdae-ro, Dongdaemun-gu, Seoul 02504, Republic of Korea Mee-Yeon Kim: Architectural 2 Part, Design Development Team, MIDAS IT, 17 Pangyo-ro 228 beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do 13487, Republic of Korea Wan-Shin Park: Department of Construction Engineering Education, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea | ||