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| 研究生： |
郭世明 Shin-Ming Kuo |
|---|---|
| 論文名稱： |
黏性阻尼器於結構隔震設計之應用分析 Analytical Study on the Role of Viscous Dampers in Seismic Isolation Systems |
| 指導教授： |
黃震興
Jenn-Shin Hwang |
| 口試委員: |
陳瑞華
Rwey-Hua Cherng 宋裕祺 Yu-Chi Sung |
| 學位類別： |
碩士 Master |
| 系所名稱： |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
| 論文出版年： | 2006 |
| 畢業學年度： | 94 |
| 語文別： | 中文 |
| 論文頁數： | 240 |
| 中文關鍵詞： | 近斷層地震 、隔震系統 、鉛心橡膠支承墊 、性阻尼器 |
| 外文關鍵詞： | Isolation Systems, LRB, FVD, Near-Field Earthquakes |
| 相關次數： | 點閱：390 下載：7 |
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摘要
雖然隔震設計的防震效益已在試驗室及實務工程上獲得驗證，但是在較軟弱的地層及近斷層地帶，隔震設計的應用則是面臨著位移過大的挑戰。由於軟弱土層所傳遞之地震波週期較長，容易造成隔震系統產生過大之位移，而近斷層地震由於具有脈衝之速度波，在一些研究之中亦顯示其可能造成隔震系統產生過大之位移。由上述之說明及國內各地斷層遍佈的事實，且九二一地震確實測得許多近斷層地震及長週期地震資料，可知國內使用隔震設計時必將經常遭遇隔震系統位移需求過大的問題，為使隔震系統傳遞之水平力不至於明顯放大，又可同時控制隔震系統之位移，非線性黏性阻尼器在國內隔震設計的應用必將成為不可或缺的工具。
同時，隔震設計若兼顧最大考量地震(MCE)及近斷層地震(NFE)進行設計，則又可能因隔震設計過於保守使得隔震系統剛性過大或阻尼力過大而導致對中小地震(Frequently Occurred 及 Occasionally Occurred)失去隔震功效。所以，要設計一個優質的隔震系統，在不考慮使用目前尚不是非常穩定可靠的半主動控制方法下，欲使得隔震系統得以在小、中、大地震及近斷層地震作用下均能完善地發揮其隔震功能是非常困難的。
根據上述之討論，本研究的主要目的乃在於利用非線性黏性阻尼器（包含 及 之非線性黏性阻尼器），合併使用具雙線性遲滯特性的鉛心橡膠支承墊，試圖發展出可以在小、中、大地震及近斷層地震中發揮效果的隔震系統。並比較 及 之非線性黏性阻尼器對於隔震設計之應用。
Abstract
The excessive displacement demand on the isolation system by long period and/or near field earthquake ground motions is always a concern when designing a seismically isolated structure. If the isolated structure is designed with respective to the demand of maximum considered earthquakes and/or near field earthquakes, the isolation system may not perform effectively well when the isolated structure is subjected to small and moderate earthquakes. Therefore, it is very difficult to design an isolation system that will perform effectively across small, moderate and major earthquakes (or call it all purpose isolation system, APIS).
It has been recognized that to include viscous dampers in an isolation system is an effective method to control the displacement response without dramatically increasing the transmitted force of the isolation system. This is due to the existence of a phase lag between the damper force and damper displacement while most of isolation bearings such as lead-rubber bearings has an in-phase behavior between their force and displacement. In this study, analytical study is conducted to study the significance of damping exponent and in an isolation system composed of viscous dampers and lead-rubber bearings. Conceptually, the purpose for adopting the so far never-used (in civil engineering structures) viscous dampers with is to fulfill the requirement of an APIS. This is because the viscous damper is an redundant when the isolated structure is subjected to small and moderate earthquakes, and is efficiently effective while major earthquakes strike.
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