臺灣博碩士論文加值系統

利用構造物之實際破壞行為為基礎之極限設計理論比用材料之彈性破壞為基礎之彈性設計理論更能準確地評估構件在塑性區之延展性。因此，本研究以24根鋼筋混凝土梁進行抗彎試驗，來探討鋼筋混凝土保護層剝離長度及裂縫寬度與梁之塑性迴轉角間之關係。利用此次實驗所量得之裂縫寬度、裂縫深度及鋼筋混凝土保護層剝離長度轉換成之裂縫與剝離旋轉角進行比較，進而提議裂縫與剝離塑性迴轉角之實驗迴歸計算式以供參考。並與Mattock（1967）及Corley（1966）所提之塑性迴轉角比較，其結果顯示在 ACI 318 耐震設計規定之設計範圍內有相近之趨勢。

The limit design theory considered the failure behavior of structures is more accurate in estimating the ductility of the plastic region than the elastic design theory considered elastic failure of material. Twenty-four concrete beams were tested in this research, observing and studying the relationship between the thickness of the concrete cover and the width of the crack and rotational capacity of reinforced concrete beams. By measuring the width and depth of the crack and the thickness of the concrete cover during the experiments, the deformation were used to compute the rotation of the beam and analyzed, and supplied the reference equation of the plastic rotation of the beam to use. It appeared that the plastic rotation of the beam from the result of experiment has the similar tendency with both the theory of Mattock (1967) and Corley (1966) during the region of the Provision for Seismic Design in ACI 318.

頁數
摘要Ⅰ
ABSTRACTⅡ
目錄Ⅲ
表目錄Ⅵ
圖目錄Ⅷ
第一章 緒論
1-1研究動機1
1-2研究目的2
第二章 文獻回顧
2-1鋼筋混凝土梁之延展行為3
2-2影響延展性之參數4
2-3梁構件之變形6
2-4塑性長度與塑性迴轉角6
2-5構件的剝離長度與裂縫之關係9
第三章 塑性迴轉角分析模式
3-1應力應變關係12
3-1-1混凝土12
3-1-2鋼筋13
3-2鋼筋混凝土構件斷面之分析14
3-3降伏曲率15
3-4極限曲率16
3-5梁之曲率變位及塑性迴轉角之計算17
3-6計算機之處理程序18
第四章 實驗計畫
4-1實驗目的20
4-2實驗規劃20
4-3實驗材料21
4-4試體之製作21
4-5主要實驗設備22
4-6實驗項目及準備23
4-7實驗步驟24
第五章 實驗結果與討論
5-1荷重與變位之關係26
5-2彎矩與曲率之關係27
5-3塑性迴轉角計算27
5-3-1剝離塑性迴轉角與z/d之關係29
5-3-2剝離塑性迴轉角與淨拉力筋比之關係30
5-3-3剝離塑性迴轉角之參考計算式31
5-3-4裂縫塑性迴轉角之參考計算式32
第六章 結論與建議
6-1結論35
6-2建議36
參考文獻37

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