蔡克銓臺灣大學：土木工程學研究所蕭博謙Hsiao, Po-ChienPo-ChienHsiao2007-11-252018-07-092007-11-252018-07-092004http://ntur.lib.ntu.edu.tw//handle/246246/50368摘 要 經過近幾年來對於挫屈束制支撐(BRB)之相關研究，可以證實此種消能斜撐確實為一種十分有效的耐震消能元件。因其在受壓時並不會產生挫屈的現象，所以在反覆加載之下可以產生相當飽滿的遲滯迴圈行為，同時消散大量的能量。近幾年來在台灣、日本與美國此種斜撐皆已漸漸被廣泛的使用。 但在過去的相關研究當中，挫屈束制支撐往往是以單軸拉壓的方式進行構件試驗，而在構架試驗方面略顯不足。此外，若要能夠真實反應出斜撐於結構物中不同樓層之行為，採用一樓一跨的試驗模式已不足夠，必須以三層樓之構架來進行試驗才能更確實的呈現出真實結構之行為。 因此，本研究即為一個實尺寸三層樓之挫屈束制支撐構架試驗，希望透過如此的試驗更加了解挫屈束制支撐於結構中之行為。而本研究的主要項目有：1)探討整體構架之行為，將試驗結果與分析軟體所預測之結果以誤差分析的方式作比較，且進一步改善預測分析之模型，以建立更準確之解析模型，可提供未來分析模擬之參考。2)檢討挫屈束制支撐於構架當中是各項行為表現，包括接合板之行為與分析、斜撐消能情形、斜撐累積塑性韌性表現、斜撐端部轉角、不平衡力與斜撐韌性等。3)以構件試驗的方式，研究新式脫層材料與脫層厚度對挫屈束制支撐之行為影響。希望透過本次的試驗與分析結果，提供未來相關研究與相關規範之參考依據。In recent years, a lot of researches concerning BRB(Buckling Restrained Braces) confirmed that BRBs are effective components resisting earthquakes. It’s because the BRBs won’t buckle with applied compression axial force, they can develop full hysteresis and dissipate lots of energy. BRBs have been used gradually in recent years including Taiwan, Japan and United States. In past researches, the experiments of BRBs were always component tests by applying axial tension or compression force. The braced frame tests were insufficient. Furthermore, an one-story one-bay specimen is not enough to react the actual behavior of common structures. An 3-story specimen is needed to exactly present the behavior of real structures. Therefore, the specimen of this research is a full-scale 3-story 3-bay composite structure, using concrete filled steel tube (CFT) columns in a buckling restrained braced (CFT/BRB) frame. The specimen was tested using pseudo dynamic test procedures and internet testing techniques. There are some topics in the thesis: 1) Finding the global response of the 3-stories frame, and discussing the error between experimental results and analytic responses(Prediction). The error analysis is helpful for modifying the analysis models(Simulation). 2) Discussing several items relating to BRBs behavior, including behavior of gusset, dissipated energy, CPD, end rotation, unbalanced load and ductility of BRBs. 3) By component testing, research a new type of unbonding material and how the thickness of unbonding material affect the behavior of BRBs. Help the discussions above is useful for the relative research in the future. From experiment, we found the gussets buckle without stiffeners. After adding stiffeners at the edges of gusset, the buckling of gussets never occurred. In the analysis, abbreviating the distance between the end of BRBs and the surface of nearby beam or column is also helpful to avoid the gusset buckling. Besides, BRBs behave well in the frame. They take about 80% of story shear, and dissipate the most of imported earthquake energy. By discussing CPD of braces, it confirm that BRBs can take many large earthquakes without failure. The end rotation of BRBs is existent, and that can be estimate. In the research of the new unbonding material(asphalt), it’s proved that the thickness of unbonding material is the primary factor affecting the difference between tension and compression force. Asphalt can take the place of silicone rubber, it substantially reduce the cost of braced manufacture.誌謝..........................................................................................................一 中文摘要..................................................................................................二 英文摘要..................................................................................................三 目錄..........................................................................................................四 表目錄......................................................................................................八 圖目錄…..............................................................................................一○ 照片目錄..............................................................................................一八 第一章 緒論............................................................................................1 1.1 前言..............................................................................................1 1.2 研究動機......................................................................................2 1.3 研究目的與內容..........................................................................3 1.4 論文架構......................................................................................4 第二章 試驗計畫....................................................................................6 2.1 構架設計與施工..........................................................................6 2.1.1 構架試驗介紹與設計..........................................................6 2.1.2 斜撐之力學行為與設計......................................................7 2.1.3 構架施工............................................................................14 2.2 BRB彈性校準試驗與結果........................................................18 2.2.1 彈性校準試驗目的與方式................................................18 2.2.2 彈性校準試驗結果............................................................19 2.3 施力系統、量測系統與資料收集系統....................................20 2.3.1 施力系統............................................................................20 2.3.2 量測系統............................................................................20 2.3.3 資料收集系統....................................................................23 2.3.4 試驗加載歷時....................................................................23 2.3.5 試體基本材料試驗............................................................23 2.4試驗構架非線性預測分析.........................................................24 第三章 第一階段試驗過程與結果......................................................26 3.1 試驗過程....................................................................................26 3.2 整體構架行為探討....................................................................32 3.2.1 與預測分析模型結果之比較............................................32 3.2.2 誤差分析............................................................................36 3.3 BRB行為探討.............................................................................39 3.3.1接合版(Gusset)之設計與分析...........................................39 3.3.2斜撐之非線性行為.............................................................43 3.3.3斜撐消能情形.....................................................................45 3.3.4 累積塑性韌性量(CPD) .....................................................46 3.3.5 斜撐端部轉角需求............................................................48 3.3.6不平衡力(Unbalance Load) ...............................................52 3.3.7斜稱在構架中拉壓應變關係 .........................................56 3.3.8斜撐韌性..............................................................................57 第四章 第二階段試驗過程與結果......................................................58 4.1 第二階段試驗試驗動機與改善項目........................................58 4.2 試驗過程....................................................................................59 4.3 整體構架行為探討....................................................................62 4.3.1 與預測分析模型結果之比較............................................62 4.3.2 誤差分析............................................................................63 4.4 BRB行為探討.............................................................................65 4.4.1接合版(Gusset)之行為分析...............................................65 4.4.2斜撐之非線性行為.............................................................65 4.4.3斜撐消能情形.....................................................................66 4.4.4 累積塑性韌性量(CPD) .....................................................67 4.4.5 斜撐端部轉角需求............................................................67 4.4.6不平衡力(Unbalance Load) ...............................................69 4.4.7斜撐韌性..............................................................................70 第五章 試體構架實驗後非線性反應模擬..........................................71 5.1 改善PISA3D分析模型.............................................................71 5.1.1 考慮樓版............................................................................72 5.1.2 半剛接替代鉸接................................................................73 5.2 實驗結果比較............................................................................76 第六章 新式脫層材料與厚度對BRB之影響研究..............................79 6.1 研究動機......................................................................................79 6.2 試驗計畫......................................................................................80 6.3 試體設計與製作..........................................................................82 6.3.1 試體設計............................................................................82 6.3.2 試體製作簡介....................................................................82 6.4 試驗加載歷時............................................................................84 6.5 試驗過程....................................................................................85 6.6 試驗結果與討論........................................................................85 第七章 結論與建議..............................................................................89 7.1 結論............................................................................................89 7.2 建議............................................................................................91 參考文獻..................................................................................................9210059128 bytesapplication/pdfen-US誤差分析位移設計法(DSD)鋼管混凝土柱(CFT)挫屈束制支撐(BRB)Buckling Restrained BracesError Analysisthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/50368/1/ntu-93-R91521221-1.pdf