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研究生： 王昱升
Yu-Sheng Wang
論文名稱： 高拉力鋼筋混凝土T形斷面梁與版間介面冷縫對整體構件耐震行為影響之研究
The Influence of Construction Cold Joint Existed between Slabs and Beams on the Seismic Behavior of Newly Reinforced Concrete T-beams
指導教授： 王勇智
口試委員:
學位類別： 碩士
Master
系所名稱： 工學院 - 土木工程學系
Department of Civil Engineering
論文出版年： 2013
畢業學年度： 101
語文別： 中文
論文頁數： 127
中文關鍵詞： 高拉力鋼筋 、預鑄施工 、施工冷縫 、交接面剪應力 、T形斷面梁 、耐震行為
外文關鍵詞： New Reinforced Concrete, Precast, Construction Joint, Interfacial Shear, T-beams, Seismic Behavior
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    • 本實驗主要是研究RC梁澆鑄介面冷縫對梁構件耐震行為影響，故利用測試梁主筋為高拉力SD685 (MPa) 螺紋節鋼筋之有翼版T形懸臂梁耐震行為，來討論有無冷縫對RC梁影響。目前大多數交接面剪應力檢核之規範與經驗公式並無考慮耐震行為對整體構件之影響，並受限於鋼筋強度，本文將探討目前規範與經驗公式是否可應用於當構件受反覆載重時的可行性以及提高鋼筋強度後構件之行為。
    由實驗結果可知，高拉力鋼筋T形梁(a/d=5.46)有澆鑄冷縫時，比整體澆鑄無冷縫之構件較早出現水平梁向裂縫。另外，若於冷縫之構件考慮鋼筋截斷，可發現含冷縫之構件其截斷處有較密集的裂縫生成。由T形梁試體交接面剪應力分析結果可知，不論構件是否考慮冷縫的存在，構件於耐震行為下並無影響。

    The experimental study mainly focused on the influence of construction cold joints existed between slabs and beam webs on the seismic behavior of high strength reinforced concrete T-beams with screwed SD685 steel bars. Most of the interfacial shear stress of code specified empirical formula did not consider the seismic effect. The study will discuss the feasibility of the code and empirical formula when the RC structures are subjected to cyclic loading.

    The experimental results show, some premature cracks horizontal to beam direction were found in the T-shaped beam (a/d =5.46) with construction cold joint. In addition, more cracks generated in the neighborhood of the beam bar cut-off than the beam without beam bar cut-off. The results of high tensile steel T-beam interface shear stress analysis showed that, regardless of the member with or without cold joints, there is no impact on the seismic behavior.

    第一章 緒論.......................................1 1.1研究動機.....................................1 1.2研究目的與方法................................1 第二章 文獻回顧....................................3 2.1規範ACI 318-11剪力摩擦設計....................3 2.2規範NZS 3101-2006剪力摩擦設計.................5 2.3規範CAN/CSA-A23.3-04交接面剪力傳遞............6 2.4新舊混凝土交接面剪力相關試驗....................8 第三章 實驗規劃與步驟..............................16 3.1試體規劃....................................16 3.2材料試驗....................................16 3.2.1鋼筋拉拔抗拉試驗..........................16 3.2.2混凝土圓柱抗壓試驗........................17 3.3試體設計....................................17 3.3.1 HT1a..................................17 3.3.2 HT1aj................................18 3.4試體製作...................................18 3.4.1應變計黏貼..............................18 3.4.2鋼筋籠組裝..............................20 3.4.3訂製模板................................20 3.4.4試體澆鑄................................22 3.4.5試體維護................................23 3.5實驗設備....................................24 3.5.1施力設備................................24 3.5.1.1柱頭預力............................24 3.5.1.2反力鋼梁............................26 3.5.1.3油壓千斤頂..........................26 3.5.2量測設備...............................27 3.5.2.1荷重計.............................27 3.5.2.2位移計.............................27 3.5.2.3傾斜計.............................28 3.5.2.4應變計.............................28 3.5.3記錄設備...............................28 3.6實驗步驟與方法..............................29 3.7實驗數據處理................................29 3.7.1理論標稱載重............................29 3.7.2理論側向加載之位移.......................30 3.7.3柱端塊體旋轉角造成之位移..................30 3.7.4臨界斷面旋轉角造成之位移..................31 3.7.5梁腹矩形應力塊量測理論....................31 3.7.6理論降伏位移............................32 3.7.7層間變位角與位移韌性比....................33 3.7.8交接面剪應力理論.........................34 3.7.9斷面分析之理論初始勁度....................34 第四章 實驗結果與討論.............................36 4.1整體受震行為評估.............................36 4.2交接面滑移觀察..............................42 4.3相對能量消散比之比較.........................44 4.4交接面剪應力預測與實驗結果比較.................44 第五章 結論與建議.................................47 5.1結論.......................................47 5.2建議.......................................48 參考文獻........................................49 附錄A..........................................91 附錄B.........................................103

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    [16] ACI Committee 374, Acceptance Criteria for Moment Frames Based on Structural Testing, ACI 374.1-05 and Commentary, American Concrete Institute, 2005.

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