G1000905 Seismic Safety Improvement of Hanging Type Mechanical Structure in Long Duration Earthquake : Examination of Low Cycle Fatigue Evaluation

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  • G1000905 長継続時間地震による天吊り形式の機械系構造物に関する耐震性の高度化 : 累積疲労評価による検討

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A lot of seismic damages of hanging type mechanical structure in industrial facilities were occurred in Great East Japan Earthquake, and the industrial functions stopped at many facilities. Moreover, fallen damage of mechanical structures from a hanging in architectural structure and the falling off of some elements in mechanical structures caused a secondary damage such as severed evacuation route. This study has been carried out to upgrade the seismic safety improvement of hanging type mechanical structure in several industrial and plant facilities from analytical and experimental approaches. In this paper, the experimental result in shaking table test is shown to investigate fallen mechanism of hanging type mechanical structure, and analytical results using nonlinear model with hysteresis damping is described. Furthermore, the evaluation of damage mechanism based on low cycle fatigue damage is conducted.

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