Journal
EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION
Volume 19, Issue 4, Pages 839-853Publisher
SPRINGER
DOI: 10.1007/s11803-020-0599-1
Keywords
existing urban RC frame building; retrofitting using seismic isolation; seismic resilience; yield ratio
Categories
Funding
- Beijing Natural Science Foundation [8192008]
- Scientific Research Foundation of Graduate School of Southeast University [YBPY2021]
- Science and Technology Project of Beijing Municipal Education Commission [KM201910016014]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_17R06]
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The improvement of the seismic resilience of existing reinforced-concrete (RC) frame buildings, which is essential for the seismic resilience of a city, has become a critical issue. Although seismic isolation is an effective method for improving the resilient performance of such buildings, target-oriented quantitative improvements of the resilient performance of these buildings have been reported rarely. To address this gap, the seismic resilience of two existing RC frame buildings located in a high seismic intensity region of China were assessed based on the Chinese Standard for Seismic Resilience Assessment of Buildings. The critical engineering demand parameters (EDPs) affecting the seismic resilience of such buildings were identified. Subsequently, the seismic resilience of buildings retrofitted with different isolation schemes (i.e., yield ratios) were evaluated and compared, with emphasis on the relationships among yield ratios, EDPs, and levels of seismic resilience. Accordingly, to achieve the highest level of seismic resilience with respect to the Chinese standard, a yield ratio of 3% was recommended and successfully applied to the target-oriented design for the seismic-resilience improvement of an existing RC frame building. The research outcome can provide an important reference for the resilience-based retrofitting of existing RC frame buildings using seismic isolation in urban cities.
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