高強度鋼筋加勁超高性能纖維混凝土低矮型剪力牆之反覆載重行為

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姓名

陳弘錡(Hung-Chi Chen) 查詢紙本館藏

畢業系所

土木工程學系

論文名稱

高強度鋼筋加勁超高性能纖維混凝土低矮型剪力牆之反覆載重行為
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摘要(中)

本研究之目的為結合超高性能纖維混凝土與高強度鋼筋，以提升低矮型剪力牆之耐震行為，並藉由實驗結果探討ACI-318規範是否直接適用於新型低矮型剪力牆之設計。此外，探討ACI-318規範與軟化壓拉桿公式對低矮型剪力牆預測強度之準確性，並建議這些公式的適用範圍。
由實驗結果得知，超高性能纖維混凝土與高強度鋼筋能有效延緩混凝土裂縫的發展，而超高性能纖維混凝土的多重開裂，使混凝土發揮應變硬化行為，顯著提升試體的韌性。超高性能纖維混凝土之纖維能分擔水平鋼筋之剪力，並有效提升試體之側向勁度與抗剪能力，不論試體搭配高強度鋼筋或一般鋼筋，試體之極限強度皆可提升8%以上。此外，使用綴縫筋之試體，即使提升40%之側向力，試體之滑移量能仍降低77%之滑移量。
由規範探討得知，ACI -14-18.10公式計算高強度混凝土試體的剪力強度會嚴重高估，導致設計不保守而產生非預期的剪力破壞，使用ACI-14-11.5計算較為恰當。但超高性能纖維混凝土的試體使用ACI-14-11.5計算，均嚴重低估剪力強度。

摘要(英)

The purpose of this study is combining Ultra High Performance Fiber Reinforce Concrete (UHPFRC) and High-Strength Steel (HS) to improve the seismic behavior of low-rise shear walls, and investgate whether ACI-318 can be used to design this kind shear walls or not. In addition, investgate the accuracy of shear strength formula which purposed by ACI-318 and softened strut-and-tie model. Then, suggest the scope for these formulas which have well estimation.
Accoarding to the experimental results, UHPFRC and HS can effectively delay the expension of cracks. Strain hardening and softening behavior of UHPFRC enhance the ductility of specimens. The fibers in UHPFRC can bear the shear force in specimens, reduce the shear force in the horizontal rebars, and effectively improve lateral stiffness and shear resistance of the specimen. Either using the HS or Normal-Strength Steel, UHPFRC can enhance the ultimate strength of the specimen more than 8%. In addition, even though enhance 40% lateral force to the specimens, the dower bars can reduce sliding more than 77%.
The shear strength formula of ACI -14-18.10 will excessively overestimate the High-Strength-Concrete (HSC) specimens, the less conservative design will cause unexpected shear failure. The shear strength formula of ACI -14-11.5 can effectively estimate the HSC specimens, but the formula will excessively underestimate the UHPFRC specimes.

關鍵字(中)

★ 超高性能纖維混凝土
★ 低矮型剪力牆
★ 高強度鋼筋

關鍵字(英)

★ ultra high performance fiber reinforced concrete
★ low-rise shear wall
★ high strength steel

論文目次

摘要 I
ABSTRACT II
誌謝 III
目錄 IV
圖目錄 X
表目錄 XXIV
第一章　緒論 1
1-1 研究動機 1
1-2 研究目的 2
1-3 研究方法 2
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 高性能纖維混凝土與超高性能纖維混凝土之應用 5
2-4 低矮型剪力牆 9
2-5 高性能纖維混凝土之剪力牆 13
2-6 ACI318-14-11.5 規範介紹 17
2-7 ACI318-14-18.10規範介紹 22
2-8 軟化壓拉桿理論介紹 23
2-8-1 對角傳力機制 24
2-8-2 水平與垂直傳力機制 27
第三章試體製作與實驗架設 33
3-1 試驗程序 33
3-2 低矮型剪力牆設計 33
3-3 低矮型剪力牆製作 46
3-3-1 腹版鋼筋之應變計黏貼 46
3-3-2 腹版之鋼筋組立 50
3-3-3 腹版之模板組 51
3-3-4 腹版之澆置 52
3-3-5 腹版之模板拆除與養護 54
3-3-6 下梁之鋼筋籠製作與模板組立 55
3-3-7 下梁灌漿 58
3-3-8 上梁之鋼筋籠製作與模板組立 61
3-3-9 上梁灌漿 63
3-4 試驗架設與施力系統 65
3-4-1 實驗架設 67
3-4-2 施力系統 71
3-4-3 量測系統 72
3-5 材料試驗 75
3-5-1 拉力試驗 75
3-5-2 壓力試驗 76
3-6 實驗數據處理方法 77
3-6-1 牆體之真實位移 77
3-6-2 牆體之勁度 77
3-6-3 能量消散 78
3-6-4 鋼筋應變值 79
3-6-5 腹版混凝土之剪力變形 79
3-6-6 剪力位移、撓曲位移與滑移位移之計算 80
第四章實驗結果與討論 83
4-1 材料試驗 83
4-1-1 圓柱壓力試驗 83
4-1-2 狗骨頭拉力試驗 86
4-1-3 鋼筋拉力試驗 89
4-2 剪力牆之反覆載重試驗 91
4-2-1 HSC-HS-0.5√(f′c) 試體 91
4-2-2 UHPFRC-HS-0.5√(f′c) 試體 97
4-2-3 UHPFRC-NS-0.5√(f′c) 試體 106
4-2-4 HSC-HS-0.83√(f′c) 試體 116
4-2-5 UHPFRC-HS-0.83√(f′c) 試體 124
4-2-6 UHPFRC-NS-0.83√(f′c) 試體 133
4-3 實驗結果 144
4-3-1 遲滯迴圈圖 144
4-3-2 裂縫發展情形 156
4-3-3 破壞包絡線 160
4-3-4 勁度衰減圖 163
4-3-5 腹版底部之剪力滑移 164
4-3-6 上梁之轉角 166
4-3-7 邊界構材撓曲主筋之應變 168
4-3-8 腹版縱向撓曲筋之應變 182
4-3-9 腹版水平剪力筋之應變 197
4-3-10 腹版混凝土之剪力變形 210
4-3-11 能量消散圖 216
4-3-12 剪力位移、撓曲位移與滑移位移於各位移比對試體之影響 219
第五章剪力強度之公式探討 224
5-1 剪力牆計算實例 224
5-1-1 ACI 318-14-11.5 225
5-1-2 ACI 318-14-18.10 225
5-1-3 Strut and Tie Model 226
5-2 剪力牆相關資料與計算結果 230
5-3 結果討論與建議 246
5-3-1 ACI 11.5公式探討 247
5-3-2 ACI 18.10公式探討 248
5-3-3 Strut and Tie Model公式探討 249
第六章結論與建議 264
參考文獻 268

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指導教授

洪崇展、李顯智(Chung-Chan Hung XIAN-ZHI LI)

審核日期

2015-12-21

推文