| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
When the building is subject to seismic ground motions and some of the structural members are damaged, the vibration characteristics of the building will change dramatically at that moment, causing discontinuities in the response. In this research, in order to detect this discontinuity and detect the damage of the structural member, a detection method using the second derivative of the acceleration, referred to as "snap", is proposed. Since snap is represented by a simple mathematical expression, the detection threshold and applicable range of the method can be easily calculated in advance. In this research project, this method was applied to the measurement record of vibration analysis and shaking table tests, showing that the detection result agreed with the theory.
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