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研究生： 吳奕翰
Wu, Yi-Han
論文名稱： 超高性能纖維混凝土結構構件之剪力行為與設計探討
Shear behavior and design of UHPFRC structural members
指導教授： 洪崇展
Hung, Chung-Chan
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： 2016
畢業學年度： 104
語文別： 中文
論文頁數： 160
中文關鍵詞： 鋼纖維 、超高性能纖維混凝土 、剪力強度 、剪力強度公式
外文關鍵詞： Steel fiber, Ultra-high performance fiber reinforced concrete(UHPFRC), Shear strength, Shear strength formula
相關次數： 點閱：202  下載：9 
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    • 本研究之目的為了解超高性能纖維混凝土(Ultra High Performance Fiber Reinforced Concrete，UHPFRC)構件之剪力強度與行為，並使用水泥、矽砂、石英粉、矽灰、強塑劑、拌合水與鋼纖維，並找出適合的拌合配比，用其拌合製作二十四支構件，分別為三種剪力跨距、二種撓曲鋼筋量、二種剪力箍筋量與二種纖維量，透過四點載重試驗，觀察各梁構件所受之剪力行為，並比較加入纖維對梁構件受到剪力行為與提供抗剪強度之表現。
    由試驗所得之數據結果，依照不同破壞模式互相比較，了解纖維對於梁構件的影響，並與現行ACI-318剪力強度規範做為比較，並建議超高性能纖維混凝土之剪力強度預測公式。實驗結果顯示，超高性能纖維混凝土可提供之剪力強度遠遠大於傳統混凝土之剪力強度，最大提供之剪力強度約為傳統混凝土的8倍，而纖維更能有效的抑制裂縫寬度大小來增加裂縫數量。

    The purpose of this study is to understand the shear strength and behavior of Ultra High Performance Fiber Reinforced Concrete (UHPFRC) members. And, to identify a suitable mixing ratio using cement, silica sand, crushed quartz, silica fume, superplasticizer, mixing water, and steel fibers. Twenty-four member with three kinds of shear span, two kinds of deflection amount of steel, two kinds of shear stirrups amount and two kinds of fiber amount were then subjected to four-point load test to observe the behavior of each beam specimens. And, to compare the shear behavior and performance between specimens with fiber and without fiber. According to different failure modes by a comparing the results of the test data obtained from each failure mode, we can understand the impact of fiber in beam members. By comparing the shear strength of the existing ACI-318 specification, we can propose a prediction formula of shear strength of UHPFRC. Experimental results show that the shear strength of the ultra-high performance fiber reinforced concrete was far greater than the shear strength of conventional concrete, the maximum shear strength provided by UHPFRC is about 8 times that of traditional concrete. In addition, fiber is more effective in controlling crack width and increase the number of cracks.

    摘要 I 誌謝 VII 目錄 VIII 表目錄 XII 圖目錄 XIII 第一章 緒論 1 1.1研究動機 1 1.2研究目的 1 1.3研究方法 1 第二章 文獻回顧 3 2.1高性能纖維混凝土 3 2.2超高性能纖維混凝土 4 2.3纖維混凝土的剪力行為 5 2.3-1鋼纖維混凝土梁之剪力模型 5 2.3-2 鋼纖維 5 2.3-3鋼纖維握裹力所提供之剪力強度 7 2.3-4纖維混凝土梁之剪力強度計算 7 2.3-4-1 Sharma(1986)之公式 8 2.3-4-2 Narayanan and Darwish (1987)之公式 8 2.3-4-3 Ashour (1992)之公式 9 2.3-4-4 Yoon-Keun (2002)之公式 10 第三章 實驗規劃與方法 11 3.1 實驗規劃 11 3.1-1試體材料 11 3.1-1-1漿體材料 12 3.1-1-2 鋼筋 13 3.1-1-3 輔助材料 14 3.1-2 試驗器具與機具 15 3.1-2-1 試驗器具 15 3.1-2-2 試驗機具 16 3.1-3試體設計 17 3.2 試體製作 22 3.2-1黏貼撓曲主筋與箍筋之應變計 22 3.2-2梁鋼筋綁紮 24 3.2-3鋼模 26 3.3 實驗方法 27 3.3-1材料壓力試驗 27 3.3-2材料拉力試驗 28 3.3-3四點載重試驗 30 3.3-3-1實驗架設流程 30 3.3-3-2實驗儀器介紹 33 3.3-3-3試驗方法與步驟 35 第四章 試驗結果與討論 36 4.1材料試驗 36 4.1.1圓柱壓力試驗 36 4.1-2混凝土拉力試驗 43 4.1-3鋼筋拉力試驗 50 4.2梁之四點載重試驗行為 52 4.2-1 各梁試體破壞發展情形概述 52 4.2-1-2 UHPC-LT-L-F 54 4.2-1-2 UHPC-T-L-F 57 4.2-1-3 UHPC-L-L-F 59 4.2-1-4 UHPC-N-L-F 61 4.2-1-5 UHPC-LT-L-N 63 4.2-1-6 UHPC-T-L-N 65 4.2-1-7 UHPC-L-L-N 67 4.2-1-8 UHPC-N-L-N 69 4.2-1-9 UHPC-LT-M-F 71 4.2-1-10 UHPC-T-M-F 73 4.2-1-11 UHPC-L-M-F 75 4.2-1-12 UHPC-N-M-N 77 4.2-1-13 UHPC-LT-M-N 79 4.2-1-14 UHPC-T-M-N 81 4.2-1-15 UHPC-L-M-N 83 4.2-1-16 UHPC-N-M-N 85 4.2-1-17 UHPC-LT-H-F 87 4.2-1-18 UHPC-T-H-F 89 4.2-1-19 UHPC-L-H-F 91 4.2-1-20 UHPC-N-H-F 93 4.2-1-21 UHPC-LT-H-N 95 4.2-1-22 UHPC-T-H-N 97 4.2-1-23 UHPC-L-H-N 99 4.2-1-24 UHPC-N-H-N 101 4.2-2 各試體力量位移圖 103 4.2-3撓曲主筋與剪力箍筋之應變圖 107 4.3實驗探討 118 4.3-1 UHPFRC vs UHPC vs 一般混凝土 118 4.3-1-1 UHPFRC vs UHPC 119 4.3-1-2 UHPFRC 與 UHPC vs一般混凝土 123 4.3-2剪力變形 135 4.3-3裂縫發展情形 139 第五章 超高性能纖維混凝土梁之剪力強度預測 142 5.1建議預測公式 142 5.2各文獻之剪力強度 143 5.3各文獻剪力強度預測 144 第六章 結論與建議 151 參考文獻 153 附錄A 各試體機器量測之力量位移圖 157

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