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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
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dc.contributor.advisor | 黃世建(Shyh-Jiann Hwang) | |
dc.contributor.author | Yu-Hsuan Yang | en |
dc.contributor.author | 楊于暄 | zh_TW |
dc.date.accessioned | 2021-06-16T03:59:35Z | - |
dc.date.available | 2020-08-21 | |
dc.date.copyright | 2020-08-21 | |
dc.date.issued | 2020 | |
dc.date.submitted | 2020-07-30 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55383 | - |
dc.description.abstract | 鋼筋混凝土梁的剪力強度,來自混凝土與剪力鋼筋的剪力強度貢獻。若欲提升鋼筋混凝土梁的剪力強度,可增加斷面之剪力鋼筋量。剪力破壞可分為剪拉破壞及剪壓破壞模式,當鋼筋混凝土梁配置之剪力鋼筋量提升至一定上限時,梁會由剪拉破壞轉變成剪壓破壞,此會造成剪力強度無法再隨著剪力鋼筋量的增加而持續上升。上述兩者皆屬於脆性剪力破壞,但剪拉破壞之破壞程序較剪壓破壞和緩。為了排除剪壓破壞發生的可能,需要對梁之最大剪力強度予以規定。目前 ACI 318-19規範在規定了最大剪力強度設計上限。但規範對於梁在何種情形下會轉換破壞模式,以及對於此設計上限之物理意義,尚未提出剪力傳遞模型來解釋此一現象發生之原因。 本論文以剪力跨深比(a/h)為分界,a/h>2 歸類為一般梁,a/h<=2 歸類為深梁。對一般梁及深梁均提出剪力傳遞模型,並建立鋼筋混凝土梁之資料庫,以驗證剪力傳遞模型於強度預測及破壞模式預測之準確性。在一般梁方面,此解析模型可清楚解釋破壞模式由剪拉破壞轉變至剪壓破壞之情形。藉由具備力學依據的剪力傳遞模型,能夠釐清對剪力強度有重要影響的參數。希望本研究建議之鋼筋混凝土梁最大剪力強度計算公式,能夠在工程設計上,對最大剪力強度提供清晰且有效率之設計依循。 | zh_TW |
dc.description.abstract | Shear strength of reinforced concrete beams is derived from shear strength contribution of concrete and shear reinforcement. In order to increase the shear strength of reinforced concrete beams, we can increase the amount of shear reinforcement in the beam section. The proposed model recognizes two failure modes, which are shear tension failure and shear compression failure. When the amount of shear reinforcement is raised to the upper limit, the failure modes of a beam will be transformed from shear tension failure into shear compression failure. At this moment, the shear strength cannot continue to rise as the amount of shear reinforcement increases. Both failure modes belong to brittle shear failure, however the destruction process of shear compression failure is more dramatic than shear tension failure. In order to eliminate the possibility of shear compression failure, it is necessary to specify the maximum shear strength. The current ACI 318-19 specification specifies the upper limit for shear strength. However, the specification does not propose a shear transfer model to explain the reason why this phenomenon occurs and does not provide the physical meanings of the upper limit. This paper devides beams into two categories based on their shear span-depth ratio(a/h), which we have typical beams with a/h>2 and deep beams with a/h<=2 . After that, this paper will propose a shear transfer model and build a reinforced concrete beam database to verify the accuracy of the shear transfer model in prediction of strength and failure mode. Then, this paper will use the proposed model to explain the transformation of the shear failure modes and comprehend how the shear force is transmitted. Based on physical meanings, several important parameters can be found. It is hoped that the proposed calculation formula for the maximum shear strength will be able to provide a design method with efficiency for engineering design. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T03:59:35Z (GMT). No. of bitstreams: 1 U0001-3007202011455100.pdf: 4087648 bytes, checksum: 5b407d1325333941ec6c92fdc25633b2 (MD5) Previous issue date: 2020 | en |
dc.description.tableofcontents | 誌謝 iii 摘要 v Abstract vi 目錄 viii 表目錄 xi 圖目錄 xii 第一章 簡介 1 1.1 研究動機與目的 1 1.2 研究內容與方法 2 第二章 文獻回顧 5 2.1 美國混凝土學會規範ACI 318-19 (2019) 5 2.1.1 ACI 318-19 (2019) 一般梁規範 5 2.1.2 ACI 318-19 (2019) 深梁規範 7 2.2 美國州際公路交通與運輸協會AASHTO-LRFD (2014) 10 2.3 國內外鋼筋混凝土梁之最大剪力強度實驗文獻 10 2.3.1 Tan (2010) 實驗文獻 10 2.3.2 Lee and Hwang (2010) 實驗文獻 11 2.4 Hwang and Lee (2002) 軟化壓拉桿模型計算 13 2.5 Lim (2015) 及 Nguyen (2016) 剪力傳遞模型 15 2.6 鋼筋混凝土梁資料庫來源 16 2.6.1 一般梁資料庫 16 2.6.2 深梁資料庫 17 第三章 鋼筋混凝土一般梁之最大剪力強度 21 3.1 剪力傳遞模型之建議 22 3.1.1 剪力傳遞機制說明 22 3.1.2 剪力傳遞模型之計算 23 3.2 最大剪力強度之預測 28 3.3 分析模型之驗證 30 3.4 建議模型與其它模型之比較 31 3.4.1 本研究建議模型與其它模型之分析結果 32 3.4.2 重要參數對最大剪力強度之影響 34 3.4.2.1 混凝土抗壓強度(f'c) 34 3.4.2.2 主筋面積比(pho,w) 35 3.5 小結 36 第四章 鋼筋混凝土深梁之最大剪力強度 39 4.1 剪力傳遞模型之建議 39 4.1.1 剪力傳遞機制說明 39 4.1.2 剪力傳遞模型之計算 40 4.2 最大剪力強度之預測 42 4.2.1 建議模型對最大剪力強度之計算 42 4.2.2 重要參數對最大剪力強度之影響 44 4.3 建議模型之驗證 46 4.3.1 建議模型與其它模型對最大剪力強度之比較 47 4.3.2 建議模型與ACI 318-19 (2019) 模型對剪力強度之比較 53 4.3.2.1 SST與ACI 318-19 (2019) 對剪力強度之評估 53 4.3.2.2 ACI 318-19 (2019) 壓拉桿模型之檢討 53 4.4 小結 56 第五章 結論及建議與未來的展望 59 5.1 結論及建議 59 5.2 未來的展望 62 參考文獻 63 附錄一 一般梁之計算範例 96 附錄二 深梁之計算範例 114 | |
dc.language.iso | zh-TW | |
dc.title | 鋼筋混凝土梁之最大剪力強度研究 | zh_TW |
dc.title | A Study on Maximum Shear Strength of Reinforced Concrete Beams | en |
dc.type | Thesis | |
dc.date.schoolyear | 108-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 李宏仁(Hung-Jen Lee),李翼安(Yi-An Li) | |
dc.subject.keyword | 鋼筋混凝土梁,剪力強度,最大剪力強度, | zh_TW |
dc.subject.keyword | Reinforced Concrete Beams,Shear Strength,Maximum Shear Strength, | en |
dc.relation.page | 126 | |
dc.identifier.doi | 10.6342/NTU202002088 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2020-07-30 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 土木工程學研究所 | zh_TW |
顯示於系所單位: | 土木工程學系 |
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