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姓名 林世陞(Chin-Bi Lin)  查詢紙本館藏   畢業系所 土木工程學系
論文名稱 高樓結構裝設調和液柱阻尼器減振效應之風洞實驗研究
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摘要(中) 摘要
近年來,國內出現大量的高層建築,這些高樓結構物,有別於傳統
的鋼筋混凝土建築,具有質量輕、強度高、高寬比大、自然振動頻率低
與阻尼低之特性,對風敏感性增加,使得風力作用成為地震之外,在結
構設計時必須考慮的重要因素,特別是位於西太平洋颱風區,風害頻繁
的台灣。高層結構物振動與紊流風場之間的互制現象是一個相當複雜的
問題,到目前為止,並無適當的理論或數值模式可準確地預測,工程界
仍仰賴風洞模型實驗,配合實地的風場資料來評估結構物受風力的動態
反應。
本研究將裝設調和液柱阻尼器高樓結構模型置於邊界層風場中,量
測結構物在不同風速時,其順、橫風向風力與結構反應的時間歷時。此
系統可視為二自由度之運動方程式,以氣動力阻尼係數修正此方程式,
由Davenport 順風向與Ohkuma & Kanaya 橫風向風力頻譜,利用數
值方法計算系統之氣動力反應、轉換函數與均方根反應。整合風洞實驗
與理論分析的結果,建立包括風場特性、結構外型、結構特性與調和液
柱阻尼器特性之分析模式,並對調和液柱阻尼器的效用進行評估,以瞭
解其對結構氣動力效應抑制的程度。
藉由本研究可瞭解結構物與風場之互制現象以及結構物受風之氣動
力反應,並結合調和液柱阻尼器,達到改善結構物抗風特性的目的,可
更精確地建立結構物受風力之反應模式,希望對國內結構耐風設計提供
一參考準則。
摘要(英) widely used in the construction of high-rise buildings in the recent year,
wind-induced vibration of flexible and flexibly supported rigid body has
become a research area of great interest. However, this
phenomenon involves complex fluid-structure interaction. To this
date, the understanding of the phenomenon remains incomplete.
In this study, the aerodynamic behaviors of high-rise buildings with
tuned liquid column dampers are experimentally investigated.
Experiments are carried out in a large-scale atmospheric wind tunnel.
By changing the natural frequency and damping ratio of structure, the
amplitude and frequency of vibration are measured for a variety of wind
conditions. The vortex shedding from a vibration structure are
investigated to understand the lock-in phenomenon. Finally, the
effectiveness of tuned liquid column damper to reduce wind-induced
vibration are tested in this study. Results of this study can improve our
understanding of the fluid-structure interactions and the design of highrise buildings.
關鍵字(中) ★ 高層建築
★ 氣動力效應
★ 調和液柱阻尼器
關鍵字(英) ★ high-rise buildings
★ aerodynamic effect
★ TLCD
論文目次 中文摘要..............................................Ⅰ
英文摘要..............................................Ⅱ
目錄..................................................Ⅲ
表目錄................................................Ⅴ
圖目錄................................................Ⅵ
照片目錄..............................................Ⅸ
符號表................................................Ⅹ
第一章簡介.........................................1
1.1 序言............................................1
1.2 研究動機........................................2
1.3 大綱............................................3
第二章理論基礎與文獻回顧............................4
2.1 風洞實驗之流場特性模擬...........................4
2.2 結構振動........................................7
2.3 調和液柱阻尼器..................................12
2.4 運動方程式.....................................13
2.5 氣動力阻尼之評估................................17
2.6 數值分析模式....................................23
第三章實驗設備與方法..............................32
3.1 實驗設備.......................................32
3.2 量測儀器.......................................37
3.3 實驗流程與數據採樣.............................40
第四章結果與討論..................................66
4.1 模式驗證.......................................66
4.2 實驗結果.......................................68
4.3 參數研究.......................................72
第五章結論與建議.................................103
5.1 結論..........................................103
5.2 建議..........................................104
參考文獻..........................................106
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土木工程研究所碩士論文
指導教授 蔣偉寧(Wei-Ling Chiang) 審核日期 2000-7-17
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