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系統識別號 U0026-1808202017202300
論文名稱(中文) 超高性能纖維混凝土於梁柱接頭耐震補強之效用
論文名稱(英文) Effectiveness of Ultra-High Performance Fiber Reinforced Concrete for Retrofitting Beam-Column Joints
校院名稱 成功大學
系所名稱(中) 土木工程學系
系所名稱(英) Department of Civil Engineering
學年度 108
學期 2
出版年 109
研究生(中文) 蕭信睿
研究生(英文) Hsin-Jui Hsiao
學號 N66074085
學位類別 碩士
語文別 中文
論文頁數 274頁
口試委員 指導教授-洪崇展
口試委員-蔡榮根
口試委員-李宏仁
口試委員-施忠賢
口試委員-蕭輔沛
中文關鍵字 超高性能纖維混凝土  鋼筋網  外部梁柱接頭  結構補強 
英文關鍵字 UHPFRC  Steel Mesh  Exterior Beam-Column Joints  Retrofit 
學科別分類
中文摘要 在1999年集集大地震後,台灣國家地震工程研究中心針對既有建物的耐震能力評估與補強技術展開一系列的研究與試驗,隨著新型混凝土材料的發展,高強度混凝土的應用雖然可以節省材料的用量及減少結構物重量等效益,但其性質較脆性,容易於發生破壞時產生強度驟降,相較之下,本研究主要利用超高性能纖維混凝土(Ultra-High Performance Fiber Reinforced Concrete, UHPFRC)補強於鋼筋混凝土梁柱接頭,藉由提高混凝土強度,不僅能夠有效減少補強後之尺寸,且混凝土中之鋼纖維可藉由橋接效應,增加混凝土拉力強度、提高能量消散能力。本研究依照早期梁柱接頭典型缺失,設計一座非韌性鋼筋混凝土梁柱外部接頭試體作為控制組,使用六種不同補強方式探討其對於既有接頭之補強效益,另外使用UHPFRC與鋼筋網補強兩座已達完全倒塌狀態之梁柱接頭,探討其補強方法對於受損接頭之補強效益。
根據試驗結果與分析,不論補強前梁柱接頭為既有或受損狀態,超高性能纖維混凝土做為補強材料均可有效改變試體之破壞模式,提升32%~66%之試體側向強度、35%~217%能量消散能力等耐震能力,同時可以降低試體損傷值,提升結構物體抗地震力受損之能力,其中以UHPFRC與鋼筋網搭配使用可呈現更顯著的補強效益。此外,UHPFRC與鋼筋網之預鑄補強之工法亦能得到與場鑄補強工法相近的補強效益,此方法可簡化施工的程序並縮短工時,提高補強施工的效率。
英文摘要 After Chi-Chi earthquake in 1999, Taiwan National Center for Research on Earthquake Engineering started to conduct a series of research and experiments for the seismic assessment and retrofit techniques of existing building. With development of new concrete materials, application of high strength concrete (HSC) is effective to reduce the usage of material and the weight of the structure. However, HSC showed brittle behavior and dramatic drop of strength after member cracking. Ultra-high performance fiber reinforced concrete (UHPFRC) was used to retrofit reinforced concrete beam-column joints (BCJs) in this study. Dimensions of member section can be decreased after retrofitting by increasing concrete compressive strength. Furthermore, addition of steel fiber in the concrete increased tensile strength and ability of energy dissaption due to fiber bridging effect. According to the typical substandard reinforcing detail in old existing building, a non-ductile reinforced concrete exterior BCJ was designed as control specimen. Six different retrofitting solutions were applied to investigate the effectiveness of UHPFRC for retrofitting existing BCJs. In addition to retrofitting existing BCJs, two BCJs which experienced complete damaged retrofitted by UHPFRC and steel mesh were included in this study. Due to the test result, the applictation of UHPFRC to retrofit existing and damaged BCJs showed significant effectiveness. UHPFRC jacket provided a considerable increase in strength by 35%~66% and ability of energy dissipation by 35%~217%. Damaged index can be also reduced after retrofitting.
論文目次 摘要 I
誌謝 VIII
目錄 XI
表目錄 XVII
圖目錄 XX
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 2
第二章 文獻回顧 3
2.1 梁柱接頭破壞模式 3
2.2 常見梁柱接頭缺失 4
2.3 非韌性梁柱接頭行為與實驗 5
2.4 ACI 318-19梁柱接頭相關規範 9
2.4.1 梁柱接頭幾何與鋼筋配置 9
2.4.2 梁柱接頭強度檢核 11
2.5 接頭抗剪容量衰減模型 15
2.6 纖維混凝土 18
2.6.1 工程水泥基複合材料 18
2.6.2 高性能纖維混凝土 19
2.6.3 超高性能纖維混凝土 21
2.7 梁柱接頭補強應用回顧 22
2.7.1 擴柱補強 22
2.7.2 鋼絲網混凝土補強 24
2.7.3 鋼板補強 27
2.7.4 預鑄板補強 29
第三章 既有梁柱接頭補強試驗 30
3.1 實驗規劃 30
3.1.1 材料性質 30
3.1.1.1 實驗材料 30
3.1.1.2 混凝土抗壓試驗結果 35
3.1.1.3 混凝土抗拉試驗結果 39
3.1.1.4 鋼筋抗拉試驗結果 42
3.1.1.5 鋼筋網試驗結果 44
3.1.2 試體設計 45
3.1.2.1 試體命名與參數說明 45
3.1.2.2 試體尺寸 46
3.1.2.3 控制組試體(NC)細部設計 47
3.1.2.4 梁柱接頭補強設計 55
3.1.2.5 梁與柱構件標稱強度 63
3.1.3 控制組試體施作 66
3.1.3.1 應變計黏貼 66
3.1.3.2 鋼筋綁紮與模板組立 67
3.1.3.3 試體澆置與養護 69
3.1.4 補強試體施作 70
3.1.4.1 鋼筋網纖維混凝土補強 70
3.1.4.2 纖維混凝土預鑄板補強施作 72
3.1.4.3 碳纖維樹脂複合材料施作 75
3.1.5 材料試驗試體製作 76
3.2 試驗方法與配置 77
3.2.1 試體裝設 78
3.2.2 加載歷時 79
3.2.3 量測系統 80
3.2.3.1 內部量測系統配置 80
3.2.3.2 外部量測系統配置 81
3.3 補強試驗結果 83
3.3.1 反覆載重試驗 83
3.3.1.1 試體NC 83
3.3.1.2 試體NCF 90
3.3.1.3 試體FRP 97
3.3.1.4 試體ECF 105
3.3.1.5 試體UC 113
3.3.1.6 試體UCF 124
3.3.1.7 試體UCP 133
3.3.2 遲滯迴圈與包絡線 140
3.3.3 試體鋼筋應變 149
3.3.3.1 試體主筋應變 149
3.3.3.2 試體箍筋應變 150
3.3.3.3 補強鋼筋網應變 151
3.3.4 接頭剪力與破壞模式 152
3.3.4.1 接頭剪力計算方式 152
3.3.4.2 破壞模式與說明 154
3.3.4.3 構件內力與評估強度比較 156
3.3.5 韌性比 158
3.3.6 試體勁度 160
3.3.7 能量消散行為 162
3.3.8 試體變形與變形貢獻 167
3.3.8.1 梁塑鉸區轉角 167
3.3.8.2 接頭剪變形 169
3.3.8.3 位移貢獻 172
3.3.9 損傷指標值 (Damage Indice) 175
3.4 混凝土預鑄式包覆補強與鋼板包覆補強 180
3.5 小結 182
第四章 受損梁柱接頭補強試驗 185
4.1 實驗規劃 185
4.1.1 材料性質 185
4.1.1.1 混凝土抗壓試驗結果 185
4.1.1.2 混凝土抗拉試驗結果 187
4.1.1.3 鋼筋抗拉試驗結果 189
4.1.1.4 鋼筋網試驗結果 189
4.1.2 控制組試體設計 190
4.1.3 補強設計與強度評估 194
4.1.4 補強施工 199
4.2 試驗方法與配置 200
4.2.1 試體裝設與加載歷時 200
4.2.2 量測系統 200
4.2.2.1 內部量測系統 200
4.2.2.2 外部量測系統 201
4.3 補強試驗結果 201
4.3.1 反覆載重試驗 201
4.3.1.1 試體BCJA 201
4.3.1.2 試體BCJB 202
4.3.1.3 試體DA 204
4.3.1.4 試體DB 213
4.3.2 遲滯迴圈與包絡線 222
4.3.3 試體鋼筋網應變 224
4.3.4 接頭剪力與破壞模式 225
4.3.4.1 破壞模式說明 225
4.3.4.2 構件內力與評估強度比較 227
4.3.5 韌性比 228
4.3.6 試體勁度 229
4.3.7 能量消散行為 230
4.3.8 試體變形與變形貢獻 231
4.3.8.1 梁塑鉸區轉角 231
4.3.8.2 接頭剪變形 233
4.3.8.3 位移貢獻 233
4.3.9 損傷指標值 (Damage Indice) 235
4.4 小結 237
第五章 結論與建議 239
5.1 結論 239
5.2 建議 242
參考文獻 243
附錄A 鋼筋應變計應變圖 250

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