동조액주관댐퍼의 가진진폭별 오르피스감쇠특성에 대한 연구 (A Study on the Orifice Damping Characteristics of Tuned Liquid Column Damper with Various Excitation Amplitude)

서지정보

· 발행기관 : 대한건축학회
· 수록지 정보 : 대한건축학회논문집 구조계 / 25권 / 6호 / 41 ~ 48페이지
· 저자명 : 유기표, 유장열, 송창현, 김영문

초록

With the production of light‐weight and high‐strength construction materials and the advance of structure design
techniques, various forms of high‐rise buildings are being constructed. These buildings cannot help considering the effect of
wind load. Because wind velocity grows higher with the increase in height from the ground, high‐rise buildings respond
sensitively to the wind and make vibration. In order to reduce the vibration, many additional mass devices are being developed.
Recently, supplementary dampers using tuned liquid column damper (TLCD) are being developed actively. This study purposed
to measure the amplitude response and the head loss coefficient of TLCD for different sizes of excitation amplitude according to
the aperture ratio of orifice. In addition, we obtained the head loss coefficient according to the length of the horizontal column at
natural frequency determined by the length of the vertical column and the horizontal column of TLCD. Thus, this study analyzed
for the amplitude response and head loss coefficient of tuned liquid column damper according to the porosity of orifice while
vibrating amplitude and natural frequency change. In addition, as the natural frequency of TLCD is determined by the length of
the vertical and the horizontal column, we examined the variation of the head loss coefficient of orifices in adjusting natural
frequency according to the length of the horizontal column. In the results of experiment, the larger vibrating amplitude was, the
lower the head loss coefficient was. Under the same porosity, the head loss coefficient decreased by up to 4 times by 1mm of
vibrating amplitude and 20mm of vibrating amplitude. Porosity and vibrating amplitude had a considerable effect on the head loss
coefficient. When the length of the horizontal pipe increased, the overall head loss coefficient decreased by around 1.5-2 times.

영어초록

With the production of light‐weight and high‐strength construction materials and the advance of structure design
techniques, various forms of high‐rise buildings are being constructed. These buildings cannot help considering the effect of
wind load. Because wind velocity grows higher with the increase in height from the ground, high‐rise buildings respond
sensitively to the wind and make vibration. In order to reduce the vibration, many additional mass devices are being developed.
Recently, supplementary dampers using tuned liquid column damper (TLCD) are being developed actively. This study purposed
to measure the amplitude response and the head loss coefficient of TLCD for different sizes of excitation amplitude according to
the aperture ratio of orifice. In addition, we obtained the head loss coefficient according to the length of the horizontal column at
natural frequency determined by the length of the vertical column and the horizontal column of TLCD. Thus, this study analyzed
for the amplitude response and head loss coefficient of tuned liquid column damper according to the porosity of orifice while
vibrating amplitude and natural frequency change. In addition, as the natural frequency of TLCD is determined by the length of
the vertical and the horizontal column, we examined the variation of the head loss coefficient of orifices in adjusting natural
frequency according to the length of the horizontal column. In the results of experiment, the larger vibrating amplitude was, the
lower the head loss coefficient was. Under the same porosity, the head loss coefficient decreased by up to 4 times by 1mm of
vibrating amplitude and 20mm of vibrating amplitude. Porosity and vibrating amplitude had a considerable effect on the head loss
coefficient. When the length of the horizontal pipe increased, the overall head loss coefficient decreased by around 1.5-2 times.

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