CONVERSION OF MULTI-STORY BUILDING INTO EQUIVALENT SDOF SYSTEM AND ITS PREDICTABILITY FOR EARTHQUAKE RESPONSE

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  • KURAMOTO Hiroshi
    International Research Cooperation, Dept. of Research Administration and Management, Building Research Institute
  • TESHIGAWARA Masaomi
    Structure Division, Dept. of Structural Eng., Building Research Institute
  • KOSHIKA Norihide
    Advanced Structural Engineering, Kobori Research Complex, Kajima Corporation
  • ISODA Hiroshi
    Structure Division, Dept. of Structural Eng., Building Research Institute

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Other Title
  • 多層建築物の等価1自由度系縮約法と地震応答予測精度
  • タソウ ケンチクブツ ノ トウカ 1ジユウドケイシュクヤク ホウ ト ジシン オウトウ ヨソク セイド

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This paper shows a method of converting a multi-story building into the equivalent single degree of freedom (SDOF) system, which can be applied to performance-based seismic evaluation methods such as the Capacity Spectrum Method. The feature of the converting method is to use information obtained from non-linear push-over analysis. The validity and applicable scope of the converting method were examined through the earthquake response analyses for several regular and irregular shaped buildings in which the responses of the equivalent SDOF system and the multi degree of freedom system were compared. The analytical results showed that the earthquake responses of not only regular shaped buildings but also irregular ones can be predicted by using SDOF system converted by the proposed method. For relatively high-rise buildings, however, the higher mode effect should appropriately be considered to the response of SDOF system.

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