Experimental and numerical investigation of RC frames strengthened
with a hybrid seismic retrofit system
Nguyen-Vu Luat,Hongseok Lee,Jiuk Shin,Ji-Hun Park,Tae-Sang Ahn,Kihak Lee
Abstract
This paper presents experimental and numerical investigations of a new seismic enhancement method for existing
reinforced concrete (RC) frames by using an external sub-structure, the hybrid seismic retrofit method (HSRM) system. This
retrofit system is an H-shaped frame bolt-connected to an existing RC frame with an infilled-concrete layer between their gaps.
Two RC frames were built, one with and one without HSRM, and tested under cyclic loading. The experimental findings
showed that the retrofitted RC frame was superior to the non-retrofitted specimen in terms of initial stiffness, peak load, and
energy dissipation capacity. A numerical simulation using a commercial program was employed for verification with the
experiments. The results obtained from the simulations were consistent with those from the experiments, indicating the finite
element (FE) models can simulate the seismic behaviors of bare RC frame and retrofitted RC frame using HSRM.
Nguyen-Vu Luat:1)Deep Learning Architecture Research Center, Department of Architectural Engineering, Sejong University,
209 Neungdong-ro, Gwangjin-gu, Seoul 05006, South Korea
2)Institute of Postgraduate and Short-term training, Mien Dong Innovative Technology University, Thong Nhat, Dong Nai 76400, Vietnam
Hongseok Lee:Deep Learning Architecture Research Center, Department of Architectural Engineering, Sejong University,
209 Neungdong-ro, Gwangjin-gu, Seoul 05006, South Korea
Jiuk Shin:Department of Architectural Engineering, Gyeongsang National University, Jinju, 52828, South Korea
Ji-Hun Park:Division of Architecture and Urban Design, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, South Korea
Tae-Sang Ahn:Research Center, Korea Disaster Prevention Technology, 6-1 Neejinmal-gil, Docheok-myeon, Gyeonggi-do, South Korea
Kihak Lee:Deep Learning Architecture Research Center, Department of Architectural Engineering, Sejong University,
209 Neungdong-ro, Gwangjin-gu, Seoul 05006, South Korea
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