Cumulative Damage of High-Rise Buildings During the In-Service Period in Osaka, Japan

Abstract eng:
The objective of the research is to characterize the remaining performance of existing buildings in terms of the cumulative damage, such as the cumulative plastic ductility and cumulative residual deformation, of the buildings during the in-service period. We performed the response analysis using simulated ground motion records for the scenario earthquakes and/or observed ground motions records. Analysis models are practical models for the high-rise buildings. The cumulative damage of each building is evaluated from the result of the analyses. Our conclusions are; 1) the characteristics of input motions and building responses can be adequately categorized by using a concept of impulse index corresponding to the ratio of the maximum instantaneous input energy to total input energy. 2) the cumulative residual drift and plastic displacement during the in-service period is not so large, whereas the maximum shear story drift angle may equal or larger than 0.02.

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