한국공간구조학회논문집 (Journal of Korean Association for Spatial Structures)
- 제8권2호
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- Pages.95-103
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- 2008
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- 1598-4095(pISSN)
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- 2287-7401(eISSN)
하프파워법과 인력가진법에 의한 감쇠율 비교
Comparison of Damping Ratios by Half Power Bandwidth Method and Synchronized Human Excitation
초록
주파수영역과 시간영역의 두가지 방법을 통하여 감쇠율을 분석하였다. 11층
This paper is concerned with the damping ratios of two methods, which are frequency domain and time domain approach. Ambient vibrations and synchronized human excitation test were conducted to three reinforced concrete buildings ranging from eleven to nineteen stories. The performance of the half power bandwidth method was investigated using three kinds of sample size, 1024, 2048, and 4096. The damping ratio by synchronized human excitation ranges from 1.05% to 1.22% in the long direction and from 1.16% to 1.50% in short direction. Damping by half power bandwidth method is slightly more overestimated than the synchronized human excitation due to insufficient record length. Damping evaluation by half power bandwidth method was found to be enhanced by using the narrower bandwidth with long recorded data.
키워드