請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/89055
標題: | 應用高強度應變硬化鋼纖維混凝土於New RC構架與鋼斜撐接合之設計分析 Design analysis of the application of high-strength strain-hardening steel fiber reinforced concrete to the connection of steel braces in New RC frame |
作者: | 王映捷 Ying-Chieh Wang |
指導教授: | 廖文正 Wen-Cheng Liao |
關鍵字: | 高強度混凝土,鋼纖維,軟化壓拉桿模型,New RC, Steel fiber,High Strength Concrete,Strut-and-Tie model,New RC, |
出版年 : | 2023 |
學位: | 碩士 |
摘要: | 近年來,高強度混凝土被廣泛使用,國內的相關規範也逐步更新採用之,其原因為高強度混凝土可有效地節省材料用量並縮減構建尺寸,然而,隨著抗壓強度的提升,高強度混凝土的材料特性會為脆性,在達到極限強度時會伴隨著脆性破壞發生,為提供足夠的剪力強度並延緩脆性破壞,實際會於結構物高剪力需求區額外配置剪力橫向箍筋,以提升結構物之剪力強度並維持其構件韌性,此方法會導致施工上綁紮鋼筋之不易。
根據先前的研究指出,若於混凝土中添加鋼纖維,對於混凝土材料之韌性與抗剪強度有明顯的提升,且因鋼纖維本身之橋接效應,具有高拉力強度可有效抑制裂縫生成,因此添加鋼纖維可大幅減少橫向箍筋的配置,解決施工上的問題。 近五十年,由於高樓層建築的需求增加,利用鋼筋混凝土與鋼骨結構之複合式結構系統能提供許多效益,在美國主要用於低度地震區中高樓層之抗彎矩結構、在日本則被使用餘強震區低樓層抗彎矩結構。若使用傳統鋼筋混凝土,於強震區之高樓層建築時會有尺寸過大影響實際使用空間的狀況,因此可以引用高強度混凝土以解決此問題。 已知鋼筋混凝土與鋼骨結構之複合式結構之缺點可透過高強度混凝土改善,高強度混凝土之缺點可由添加鋼纖維改善,故本研究預計設計四座試體,以供未來探討添加鋼纖維於含鋼斜撐之高強度混凝土梁柱接頭之力學性質。試體參數為鋼纖維有無以及鋼斜撐有無,以方便後續分別針對鋼纖維及鋼斜撐對於鋼筋混凝土梁柱接頭之影響進行討論。 High-strength reinforced concrete has been widely used and promoted in high-rise buildings for many years, and domestic building codes are gradually being updated and adopted to reflect the advancements in this material. High-strength concrete offers significant benefits such as saving material consumption and reducing the size of construction components. However, as the compressive strength of concrete increases, its brittleness also becomes more pronounced. To maintain the seismic performance, additional shear reinforcement is required, leading to construction difficulties. According to previous studies, adding steel fiber to concrete can significantly improve the stiffness and shear strength of the concrete material, and due to the bridging effect of the steel fiber, the high tensile strength can effectively inhibit the formation of cracks, so adding steel fiber to concrete can greatly improve reduce the configuration of transverse stirrups and solve construction problems. In the past fifty years, because of the increasing demand for high-rise buildings, it is known that the composite structural system of reinforced concrete and steel structure can bring many benefits. It is used as a moment-resisting structure in the earthquake area in both United States and Japan. If traditional reinforced concrete is used, the size of the high-rise building in the strong earthquake area will be too large to affect the actual use of space. Therefore, high-strength concrete can be used to solve this problem. It is known that the shortcomings of the composite structure of reinforced concrete and steel structure can be improved by high strength concrete, and the shortcomings of high strength concrete can be improved by adding steel fibers. Therefore, this study plans to design four test bodies for future research to discuss mechanical properties of high-strength concrete beam-column joints with steel braces. The parameters of the test body are the presence or absence of steel fibers and steel braces, so as to facilitate subsequent discussions on the influence of steel fibers and steel braces on reinforced concrete beam-column joints. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/89055 |
DOI: | 10.6342/NTU202303012 |
全文授權: | 同意授權(全球公開) |
顯示於系所單位: | 土木工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-111-2.pdf | 6.61 MB | Adobe PDF | 檢視/開啟 |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。