臺灣博碩士論文加值系統

計畫第一年的研究，先研究預力梁中採無預力或部分預力鋼絞線作為高強度縱向鋼筋對梁結構行為的影響，後續年度接著研究採用SD 690鋼筋為縱向鋼筋以及採SD 790鋼筋為橫向鋼筋對梁結構行為的影響。本年度預力梁試體的變數包括縱向鋼筋比、預力程度(無預力或部分預力)、縱向鋼筋型式(全部採鋼絞線或部分鋼絞線部分竹節鋼筋)，對照組試體為一般鋼筋混凝土梁，總計9支梁試體，試體跨度均為8 m，斷面高度70 cm，寬度40 cm，試體試驗的重點在於觀察梁於使用載重下的裂縫寬度，以及撓曲極限狀態時之強度。目前已完成試體設計以及試體之製造模具，預計可於七月完成試體製作，並於九月完成試體測試。

In the first year of this three-year research, the effect of using non-prestressed or partially prestressed steel strands as longitudinal reinforcement on the structural behavior of concrete beams was studied by testing large-scale beam specimens. In the following two years, the effects of using SD 690 steel as longitudinal reinforcement and SD 790 steel as transverse reinforcement will be studied. The test variables of the beam specimens in this year were the longitudinal reinforcement ratio, prestress level (non-prestressed or partially prestressed), and types of longitudinal reinforcement (all steel strands or partial strands and partial deformed bars). The control beam specimens were conventional reinforced concrete beams. There were in total nine specimens. For all the specimens, the span was 8 m and the cross section was 70 cm in height and 40 cm in width. The main objective of the testing was to observe the crack width under service loads and the strength at the ultimate condition. At the time of this writing, specimen design has been completed and steel formwork for specimen manufacturing have been made. It is estimated that the specimen fabrication can be completed by the end of July and testing of the specimens can be finished by the end of September.

摘要 ...I
ABSTRACT ...III
目錄 ...V
圖目錄 ...VII
表目錄 ...IX
第一章　緒論 ...1
1.1 研究背景 ...1
1.2 研究目的與方法 ...2
第二章　文獻回顧 ...3
2.1 2013，高強度鋼筋混凝土梁剪力裂縫控制研究，陳崇慶 ...3
2.2 2015，高強度鋼筋混凝土梁之裂縫控制研究，陳少謙 ...3
2.3 2015，預力高性能混凝土梁撓曲行為，張艮瑋 ...4
2.4 2017，高強度鋼筋混凝土柱軸力與彎矩強度互制關係電腦程式-NewRC-PM之開發與研究應用，蔡東均 ...5
第三章　試體設計 ...7
3.1 斷面配置概述 ...7
3.2 試體分析與設計 ...8
3.2.1 斷面材料定義 ...8
3.2.2 裂縫寬度分析 ...10
3.2.3 伸展長度及錨頭設計 ...12
3.2.4 撓曲破壞設計與箍筋 ...14
3.2.5 混凝土彈性預力損失與施拉預力 ...16
3.3最終斷面配置說明 ...16
第四章　實驗計畫 ...19
4.1 材料試驗 ...19
4.1.1 混凝土抗壓試驗 ...19
4.1.2 鋼材抗拉試驗 ...20
4.2 實驗儀器配置與介紹 ...21
4.2.1 應變計 (Strain Gauge) ...22
4.2.2 光學空間座標監測系統 (NDI) 與紅外線反射器 (Marker) ...25
4.2.3 荷重計 (Load Cell) ...26
4.2.4 角度計 (Rotation Gauge) ...27
4.2.5 位移計 (LVDT) ...27
4.3 試驗規劃 ...27
4.4 試驗進行 ...29
4.4.1 S4 – 純竹節鋼筋 拉壓力筋各4支 ...29
4.4.2 ST4 – 純7股鋼絞線 拉壓力筋各4支 ...35
4.4.3 SR4 – 7股鋼絞線配合竹節鋼筋 拉壓力筋各4支 ...49
4.4.4 S10 – 純竹節鋼筋 拉壓力筋各10支 ...67
第五章　結論與建議 ...91
5.1 初步結論 ...91
5.2 初步建議 ...91
第六章　參考文獻 ...93
附錄A　各試體斷面圖 ...95
附錄B　有錨頭安裝之試體斷面設計圖 ...96
附錄C　各試體彎矩及裂縫寬度 – 曲率關係圖 ...97
附錄D　各試體剪力容量/承載剪力 - 斷面變形關係圖 ...99

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