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研究生: 劉建宏
CHIEN-HUNG LIU
論文名稱: 鋼筋混凝土連接梁在往覆水平載重下有/無軸向束制之影響
Cyclic Behaviors of RC Coupling Beams with/without Axial Restraint
指導教授: 鄭敏元
Min-Yuan Cheng
口試委員: 歐昱辰
Yu-Chen Ou
黃世建
Shyh-Jiann Hwang
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: 2014
畢業學年度: 102
語文別: 中文
論文頁數: 101
中文關鍵詞: 對角線鋼筋混凝土連接梁軸向束制勁度消能能力剪力強度
外文關鍵詞: axial restraint, stiffness deterioration, shear strength.
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在高樓結構中,部分或是主要的側向力是由風力及地震力為控制,結構常以剪力牆系統來抵抗,但是剪力牆常礙於門窗開孔,造成原本一面完整的剪力牆變成兩個或多個剪力牆,且牆與牆間由一系列的短梁相連,這些短梁通常稱為連接梁(coupling beam),根據過去的文獻,跨深比短而深的連接梁配置對角線鋼筋能有效提高結構性能,然而,不同的研究團隊使用不同的實驗配置,使得分析實驗數據相當困難,其中最主要不同的是提供連接梁之軸向束制。因此本研究旨在探討連接梁在有/無軸向束制之影響。
本論文測試四座1/2縮尺之對角線鋼筋混凝土連接梁,其中兩座試體跨深比分別為1.0和2.0,提供軸向束制並施以往覆水平載重;另外兩座試體,跨深比分別是1.0及2.0,僅施以往覆水平載重,實驗結果顯示有軸向束制之試體展現較高之剪力強度、側向勁度以及較佳的消能能力;無軸向束制的試體,具有較佳之變形能力並在勁度衰減方面維持較好,另外,分析比較了24組連接梁的實驗資料,其中包含本研究測試之四座試體,統計結果顯示,現行規範ACI Committee 318 (2011)低估了對角線鋼筋混凝土連接梁之剪力強度,因此提供一合理之公式來評估對角線鋼筋混凝土連接梁之剪力強度。


Coupling beams are used to connect two separate shear walls, which is called coupled shear system, it is commonly used in high-rise structures. In this system, diagonally coupling beams is an efficient element to resist earthquake proven by previous research. However, further examinations of the previous test results showed that different experimental setups have been adopted by different research groups. One of the major differences is the application of axial restraints. A total of four specimens with span-to-depth ratios at 1.0 or 2.0 were tested in this study. Test results indicates that specimens with axial restraints exhibit higher shear strength, higher stiffness, better energy dissipation ability but lower deformation capacities. Additionally, another 24 experimental results were collected and compared, including four of the specimens tested in this study. The statistical data shows that the current ACI Committee 318, (2011) underestimates the shear capacities of diagonally R.C. coupling beam significantly, especially for axial-restrained specimens. A new equation to predict shear capacity of a diagonally R.C. coupling beam is proposed.

摘要 i ABSTRACT ii 目錄 iii LIST OF FIGURE vi LIST OF TABLE x 第一章 緒論 1 1.1研究背景 1 1.2 研究動機 5 1.3研究目的與方法 5 1.4 報告內容編排 5 第二章 文獻回顧 7 2.1 對角線鋼筋發展 7 2.2 現行ACI 318-11 規範之回顧(對角線鋼筋連接梁) 15 2.3 鋼筋混凝土連接梁勁度與強度預測公式 17 2.3.1 強度預測 17 2.3.2 有效勁度 23 2.4 軸向束制行為 25 第三章 試體規劃 27 3.1試體設計 27 3.2試體與量測系統配置 32 3.3 Test Procedure 測試步驟 36 第四章 試驗結果與分析 39 4.1前言 39 4.2材料試驗 39 4.2.1混凝土 39 4.2.2鋼筋 41 4.3試體破壞模式 43 4.4試體載重與位移行為曲線 50 4.5 試體外部變形 56 4.5.1 軸向外部變形量 57 4.5.2 外部撓曲變形 58 4.6 應變計量測 63 4.7勁度預測 82 4.8對角線鋼筋剪力連接梁強度預測 86 第五章 結論 96 REFERENCE 98

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