博碩士論文 973202001 詳細資訊




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姓名 江振堂(Chen-tang Chiang)  查詢紙本館藏   畢業系所 土木工程學系
論文名稱 不同箍筋型式對低強度與普通強度混凝土柱圍束效應之研究
(Investigation on Confinement Effectiveness of Low and Normal Strength RC Column with Different Configuration of Transverse Reinforcement)
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摘要(中) 台灣目前正在進行國中、小學校老舊校舍的補強作業,但是卻發現,早期建築有許多不符合規範設計,這些將會影響結構物之承重能力及行為,本研究將針對這些影響因素進行實驗與分析,並希望能提供後人在進行補強設計時,一個參考的方向。
本研究製作14組250mm X 250mm X 800mm長之低強度與普通強度混凝土柱試體,並進行單向軸壓實驗,其中變因為不同箍筋型式以及混凝土強度。試驗主要是量測混凝土以及鋼筋應變,並繪製成應力應變圖,來探討混凝土的行為,並觀察破壞情形。
實驗結果顯示,箍筋型式未符合規範之試體表現較差,而混凝土強度較低之試體,強度與勁度較一般強度混凝土柱差,但相同狀況之圍束筋卻能顯示較好之圍束效率。
摘要(英) Recently, many retrofitting of school RC buildings are
underway. For seismic resistance of these old buildings, we found many structures were not conforming to the seismic code, and will influence the seismic performance of structures. In the study, the investigation will be focused on the behavior of these RC columns constructed according to as-built structures by means of experiments.
Fourteen short column specimens were manufactured and
subjected to monotonically axial loading. The variables for these specimens are the configuration of transverse reinforcement, tie-up method of crossties, concrete strength, and cover chipping. Deformations of concrete and tie bars were measured electronically, and the crack patterns and failure mode were observed.
Main results showed that specimens which are not designed to the standard code performed worse seismic resistance.
關鍵字(中) ★ 箍筋
★ 繫筋
★ 保護層切口
★ 低強度
★ 圍束效應
★ 鋼筋混凝土
關鍵字(英) ★ cover chipping
★ Low Strength
★ Crossties
★ Transverse Reinforcement
★ Confinement Effectiveness
★ Reinforced Concrete
論文目次 目錄 ................................................................................................ I
表目錄 ........................................................................................... V
圖目錄 .......................................................................................... VI
符號說明 ........................................................................................ X
第一章 緒論 ................................................................................. 1
1.1 研究動機 ............................................................................ 1
1.2 研究目的及方法 .................................................................. 1
第二章 文獻回顧 ........................................................................... 3
2.1 圍束理論概述 ..................................................................... 3
2.2 Mander 圍束理論 ................................................................ 4
2.2.1 圍束混凝土抗壓應力'
cc f 的計算 ...................................... 5
2.3 橫向鋼筋的效用 .................................................................. 7
2.4 柱繫筋的綁紮方式 .............................................................. 8
2.5 不同強度混凝土行為比較 .................................................... 9
第三章 實驗規劃與執行 ............................................................... 12
3.1 詴體規劃 .......................................................................... 12
3.2 詴體設計 .......................................................................... 12
3.2.1 PC與PCL鋼筋混凝土柱詴體 ..................................... 13
3.2.2 T135與T135L鋼筋混凝土柱詴體 .............................. 14
3.2.3 T90與T90L鋼筋混凝土柱詴體 .................................. 14
3.2.4 C135與C135L鋼筋混凝土柱詴體.............................. 15
3.2.5 C180與C180L鋼筋混凝土柱詴體.............................. 15
3.2.6 D90與D90L鋼筋混凝土柱詴體 ................................. 15
3.2.7 B135與B135L鋼筋混凝土柱詴體 .............................. 16
3.3 材料詴驗 .......................................................................... 17
3.3.1 混凝土抗壓行為 .......................................................... 18
3.4 詴體製作 .......................................................................... 18
3.4.1 非測詴區補強 .............................................................. 19
3.4.2 模板製作 ..................................................................... 19
3.4.3 詴體澆置及養護 .......................................................... 20
3.5 實驗設置 .......................................................................... 21
3.5.1 量測裝置 ..................................................................... 21
3.6 實驗步驟 .......................................................................... 22
3.7 實驗數據處理 ................................................................... 24
第四章 實驗結果........................................................................ 26
4.1 普通強度詴體 ................................................................... 27
4.1.1 無繫筋詴體 ................................................................. 27
4.1.2 更繫筋詴體 ................................................................. 30
4.1.3 新式箍筋詴體 .............................................................. 32
4.2 低強度詴體 ....................................................................... 33
4.2.1 無繫筋詴體 ................................................................. 34
4.2.2 更繫筋詴體 ................................................................. 36
4.2.3 新式箍筋詴體 .............................................................. 38
第五章 結果分析與討論 ............................................................. 40
5.1 低強度與普通強度混凝土之圍束效率 ................................ 40
5.2 箍筋彎鉤角度的影響 ......................................................... 41
5.3 繫筋綁紮方式的影響 ......................................................... 42
5.4 新式箍筋的效用 ................................................................ 44
5.5 破壞性檢測之保護層切口影響 ........................................... 45
第六章 結論與建議 .................................................................... 46
6.1 結論 ................................................................................. 46
6.2 建議 ................................................................................. 47
文獻回顧 ...................................................................................... 49
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指導教授 王勇智(Yung-chih Wang) 審核日期 2011-1-25
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