Improvement of seismic resilience for existing buildings based on hybrid seismic reduction technology

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (16) : 238-246.

SUN Ao1, CHEN Xin1, FU Wenwei1, 2, SUN Yong3, ZHU Yanqing3

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Abstract

In the field of earthquake engineering, building seismic resilience assessment is a research focus, which holds great significance in guiding designers to enhance the level of structural seismic design and helping managers raise awareness of structural disaster prevention. This study focuses on an existing frame structure located in the 8-degree seismic region (0.30 g). Three perspectives (repair cost, repair time, and personnel loss) were considered while evaluating the seismic resilience of the structure before and after reinforcement based on GB/T 38591-2020 "Standard for seismic resilience assessment of buildings". Furthermore, the economic benefits of the seismic strengthening program by considering the yield rate on reinforcement. The results demonstrate that the employment of viscous dampers and BRB effectively controls the dynamic response of the structure. Notably, there is a maximum drop of 76.9% and 29.8% in the story drift ratio and mean acceleration, respectively. Repair time and personnel loss are two important perspectives that affect the level of seismic resilience under rare earthquakes. The implemented seismic strengthening program greatly increases the structure's seismic resilience, even if the level of seismic resilience is still one star both before and after strengthening. These research findings serve as a valuable reference for the evaluation and improvement of seismic resilience in existing buildings.

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existing buildings / hybrid seismic reduction technology / seismic resilience assessment / resilience rating / dynamic response calculation

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SUN Ao1, CHEN Xin1, FU Wenwei1, 2, SUN Yong3, ZHU Yanqing3 . Improvement of seismic resilience for existing buildings based on hybrid seismic reduction technology[J]. Journal of Vibration and Shock, 2024, 43(16): 238-246

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