Abstract
Nearly 20 years, rare earthquake appeared frequently.The data shows that the world has entered a more active seismic activity period.The impact of earthquake damage to human life and property safety intensified, China is facing the same or even more pressing issue.Therefore, improving the seismic performance on active service structure reinforcement and reconstruction, to reduce earthquake damage, protect people's property security, to reduce the social and economic loss is of great significance. Performance-based seismic design theory, is a multi-index, multi-level seismic fortification system, it is reasonable, flexible development of seismic fortification goals.If apply this thought to structure of the seismic strengthening, forward-looking and innovative, has enormous social and economic benefits as well as the wide research prospects.
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