Time History Response Prediction for Multi-Story Buildings Consisting of Mixed Soft and Rigid Stories under Earthquake Motions

Abstract eng:
The purpose of this research is to take into account the higher mode responses in evaluating the responses of the multi-story irregular-shaped buildings consisting of mixed soft and rigid stories in which the story collapse mechanism is formed under earthquake motions. In previous study, one of the authors has proposed a method for evaluating the time history responses including higher mode components of the inter-story shear and drift for multi-story regular-shaped buildings. The results indicated that the time history response of the buildings can be accurately predicted by the proposed method. However, the applicability of the proposed method for multi-story irregular-shaped buildings is not confirmed yet. Therefore, the applicability of the proposed method for the irregular-shaped buildings was investigated in this paper. The modified method using the equivalent participation vector of the dominant higher mode for evaluating the time history responses of the inter-story shear and drift is proposed. The results showed that the predicted the time history responses of the inter-story shear and drift by the modified method has good agreement with the time history analysis result.

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