裝配式框架結構柱-柱節點試驗模型有限元分析

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裝配式框架結構柱-柱節點試驗模型有限元分析(任務書,開題報告,外文翻譯,論文16000字)
摘要
裝配式建筑是建筑產業未來的發展潮流,當前大力發展裝配式建筑受到了國家的高度重視,同時也得到了建筑業界的積極響應和參與,建筑產業現代化趨勢已經在全國各地蓬勃興起。工業化生產將逐漸替代傳統的建造方式。目前裝配式結構中節點形式大多為濕式連接,干式連接較少。并且針對裝配式梁柱節點的研究較多,工藝已經相對成熟,但關于柱-柱節點連接研究還不完善。
本文對裝配式框架結構柱-柱節點試驗模型進行有限元分析,結合與整澆柱有限元分析的對比結果,探討柱-柱節點承載能力。本文的柱-柱節點采用的是單齒柱的連接方式,即上段柱設有柱齒,下段柱留有柱槽,上下段以類似于榫接的方式連接,與榫接方式稍有區別。與目前已有的柱-柱節點相比,單齒柱-柱節點具有施工簡便、傳力途徑明確、現場濕作業較少等優點。本文以電力行業的某工業裝配式建筑為研究對象,選取了典型的裝配式框架結構柱單元,對其進行了非線性有限元建模分析,主要內容包括:
1、采用 ANSYS軟件對單齒柱和整澆柱的試驗模型進行數值模擬。建立了單齒柱和整澆柱的非線性有限元模型,通過計算分析得到了模型的荷載-位移曲線、變形形態以及應力分布,對比分析在一端固接、一端滑動情況下整澆柱和單齒連接預制柱的受力性能,驗證了單齒柱有限元模型的準確性。
2、以上述單齒柱有限元模型為基礎進行拓展,對此類結構的軸壓比等設計參數展開了討論。經計算結果分析發現:在一定范圍內,增大單齒柱的軸壓比,能夠有效提高單齒柱的側向承載能力。
3、本文通過對單齒柱-柱節點的研究提出了一些設計建議:1)建議增加側向鋼板的長度,使鋼板下邊緣低于于企口高度;2)在企口周邊混凝土中增加鋼筋網,延緩企口周邊混凝土的開裂;3)鋼板應與縱向鋼筋、箍筋同時焊接,保障鋼板焊接的牢固。

關鍵詞:裝配式結構;柱-柱節點;單齒柱;有限元分析

Abstract
Assembly building is the future trend of construction industry. At present, the state attaches great importance to the development of assembly building. At the same time, it has also received the positive response and participation of the construction industry. The trend of modernization of construction industry has flourished all over the country. Industrialized production will gradually replace traditional construction methods. At present, most of the nodes in assembly structures are wet connections, but few are dry connections. There are many studies on the fabricated beam-to-column joints, and the technology is relatively mature, but the research on the column-to-column joints is not perfect.
In this paper, the experimental model of column-column joints in assembled frame structures is analyzed by finite element method, and the bearing capacity of column-column joints is discussed by comparing with the results of finite element analysis of whole cast-in-place columns. In this paper, the column-column joints are connected by a single-tooth column, that is, the upper column has cylindrical teeth, the lower column has cylindrical grooves, and the upper and lower columns are connected in a way similar to tenon connection, which is slightly different from tenon connection. Compared with the existing column-column joints, single-tooth column-column joints have the advantages of simple construction, clear way of force transmission and less wet operation on site. In this paper, a typical assembled frame structure column element is selected for the study of an industrial assembly building in the power industry, and its nonlinear finite element modeling analysis is carried out. The main contents include:
1. The ANSYS software is used to simulate the experimental model of single-tooth column and cast-in-place column. A non-linear finite element model of single-tooth column and prefabricated column is established. The load-displacement curve, deformation form and stress distribution of the model are obtained through calculation and analysis. The mechanical properties of the prefabricated column with one-tooth connection and one-tooth connection under the condition of one-end fixed connection and one-end sliding are compared and analyzed. The accuracy of the finite element model of single-tooth column is verified.
2. Based on the single-tooth column finite element model mentioned above, the design parameters such as the axial compression ratio of this kind of structure are discussed. The results show that in a certain range, increasing the axial compression ratio of the single-tooth column can effectively improve the lateral bearing capacity of the single-tooth column.
3. Through the study of single-tooth column-column joints, this paper puts forward some design suggestions: 1) It is suggested to increase the length of the lateral steel plate so that the lower edge of the steel plate is lower than the height of the entrance; 2) It is suggested to increase the steel mesh in the concrete around the entrance of the entrance to delay the cracking of the concrete around the entrance; 3) The steel plate should be welded simultaneously with the longitudinal steel bar and stirrups to ensure the solidity of the welding of the steel plate.
Key words:Assembled structure; Column-column joint; Single-tooth column; Finite element analysis

目錄
摘要    I
Abstract    II
第1章 緒論    1
1.1 選題背景    1
1.2 裝配式建筑的發展概況    1
1.2.1 國外裝配式建筑的發展概況    1
1.2.2 國內裝配式建筑的發展概況    2
1.2.3 裝配式節點連接形式    3
1.3 裝配式建筑發展存在的不足    3
1.4 裝配式柱-柱節點概述    4
1.4.1 裝配式柱-柱節點的分類    4
1.4.2 裝配式柱-柱節點的研究現狀    6
1.5 本文主要的研究內容    7
第 2 章 有限元數值計算    9
2.1 有限元法介紹    9
2.1.1 ANSYS簡介    9
2.1.2 鋼筋混凝土結構有限元模型    9
2.2 單元類型    10
2.2.1 混凝土單元    10
2.2.2 鋼筋單元    10
2.3 本構關系    11
2.3.1 混凝土本構模型    11
2.3.2 鋼筋本構模型    12
2.3.3 接觸本構模型    12
2.4 建立有限元模型    12
2.4.1 建立幾何模型    12
2.4.2 網格劃分    13
2.4.3 定義接觸    14
2.4.4 施加約束和荷載    15
2.4.5 分析求解    15
第3章 單齒柱與整澆柱有限元結果對比    16
3.1 驗證整澆柱有限元結果    16
3.1.1 整澆柱有限元結果    16
3.1.2 整澆柱理論計算結果    18
3.1.3 整澆柱有限元與手算結果對比    20
3.2 單齒柱與整澆柱有限元結果對比    20
3.3 單齒柱討論    21
3.3.1 彈性階段    21
3.3.2 屈服階段    23
3.3.3 破壞階段    25
3.4 設計參數分析    26
3.5 小結    27
第4章 結論與展望    29
4.1 結論    29
4.2 展望    29
參考文獻    31
致謝    33

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