| Impact of seismic excitation characteristics on the efficiency of tuned liquid column dampers |
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| 作者姓名： | Ali Kavand S. Mehdi Zahrai |
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| 作者单位： | [1]School of Civil Engineering, Sharif University of Technology, Tehran, Iran [2]School of Civil Engineering, University of Tehran, Tehran, Iran |
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| 摘 要： | Various types of passive control systems have been used to suppress the seismic response of structures in recent years. Among these systems, Tuned Liquid Column Dampers （TLCDs） dissipate the input earthquake energy by combining the effects of the movement of the liquid mass in the container, the restoring force on the liquid due to the gravity loads and the damping due to the liquid movement through orifices. In this study, the effects of seismic excitation characteristics such as frequency content and soil condition on the seismic performance of TLCDs are investigated using nonlinear time-history analyses. In this regard, among the past earthquake ground motion records of Iran, 16 records with different parameters were selected. In the structural model developed, the attached TLCD is simulated as a Tuned Mass Damper （TMD） having the same vibration period and damping ratio as the original TLCD. The numerical results show that the seismic excitation characteristics have a substantial role on the displacement reduction capability of TLCDs and they should be considered accordingly in the design of TLCDs.
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| 关 键 词： | 调谐液柱阻尼器 地震激励特性 天然地基条件 被动控制 |
| 文章编号： | 1671-3664（2006）02-0235-09 |
| 收稿时间： | 2006-06-26 |
| 修稿时间： | 2006-09-12 |
Impact of seismic excitation characteristics on the efficiency of tuned liquid column dampers |
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| Ali Kavand S. Mehdi Zahrai.Impact of seismic excitation characteristics on the efficiency of tuned liquid column dampers[J].Earthquake Engineering and Engineering Vibration,2006,5(2):235-243. |
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| Authors: | Ali Kavand S Mehdi Zahrai |
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| Institution: | 1. School of Civil Engineering, Sharif University of Technology, Tehran, Iran
2. School of Civil Engineering, University of Tehran, Tehran, Iran |
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| Abstract: | Various types of passive control systems have been used to suppress the seismic response of structures in recent years. Among these systems, Tuned Liquid Column Dampers (TLCDs) dissipate the input earthquake energy by combining the effects of the movement of the liquid mass in the container, the restoring force on the liquid due to the gravity loads and the damping due to the liquid movement through orifices. In this study, the effects of seismic excitation characteristics such as frequency content and soil condition on the seismic performance of TLCDs are investigated using nonlinear time-history analyses. In this regard, among the past earthquake ground motion records of Iran, 16 records with different parameters were selected. In the structural model developed, the attached TLCD is simulated as a Tuned Mass Damper (TMD) having the same vibration period and damping ratio as the original TLCD. The numerical results show that the seismic excitation characteristics have a substantial role on the displacement reduction capability of TLCDs and they should be considered accordingly in the design of TLCDs. |
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| Keywords: | passive control tuned liquid column dampers seismic excitation characteristics frequency content subsoil conditions seismic performance |
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