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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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The identification of damping ratios in buildings is a well-known problem and appears to be of important and crucial interest in the safety and serviceability design. When compared to an estimation of the stiffness, i.e. natural frequency, and mass, the damping ratio is the most difficult quantity to determine. Many previous studies have examined the characteristics of damping ratios from ambient vibration, but the measurement time is roughly within 2 hours. In this paper, characteristics of damping ratios and natural frequencies of 4 story RC building were investigated using long-term ambient vibration. Free vibrations were obtained using random decrement technique, and damping ratios were evaluated by the envelop function, continuous wavelet transform, and logarithmic decrement. It was found that although the natural frequencies show little variations with time, the damping ratios show some variations with time and the largest variations found in the damping ratios obtained from the continuous wavelet transform. The damping ratios from the envelop function showed the smallest mean and standard deviation. And the probability distribution of damping ratios seems to follow the logarithmic normal distribution.
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참고문헌 (8)
참고문헌 신청
윤성원 / 2003 / 교차인력가진에 의한 저층건물의 감쇠율 산정 / 대한건축학회논문집 구조계 19(12):113~120
윤성원 / 2004 / 강풍시 철근콘크리트조 아파트의 사용성 설계용 감쇠율 / 대한건축학회논문집 구조계 20(8):27~34
박성아 / 2011 / 흥인지문의 상시진동 분석 / 대한건축학회논문집 구조계 27(05):19~26
Cole, H. A. / 1968 / On-the-line analysis of random vibrations
Kareem, A. / 1995 / Damping in structures : Its evaluation and treatment of uncertainty / IWEF Meeting on Structural Damping :23~49
윤성원 / 2004 / 강풍시 철근콘크리트조 아파트의 사용성 설계용 감쇠율 / 대한건축학회논문집 구조계 20(8):27~34
박성아 / 2011 / 흥인지문의 상시진동 분석 / 대한건축학회논문집 구조계 27(05):19~26
Cole, H. A. / 1968 / On-the-line analysis of random vibrations
Kareem, A. / 1995 / Damping in structures : Its evaluation and treatment of uncertainty / IWEF Meeting on Structural Damping :23~49
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