本文關鍵詞：分散筒結構墻梁節(jié)點局部增強構造措施研究　出處：《中國海洋大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 分散筒結構 數(shù)值模擬 節(jié)點

【摘要】：分散筒結構體系是一種適用于高層建筑的新型結構體系。該結構將尺寸較小的筒體作為承重構件分散布置于結構的四周,再通過框架梁等連接構件將各個筒體連接起來形成一個整體,共同提供抗側力。分散筒結構體系具有空間布置靈活、面積利用率高、抗側剛度豎向分布均勻等特點。該結構適應于現(xiàn)代高層結構的發(fā)展趨勢。本文在已有的研究成果的基礎之上,針對已研究構造措施的外形缺陷,即各措施均在結構內部形成凸起,對內部空間的使用功能、美觀以及安全造成了一定的影響。本文以此為切入點對不影響內部空間的構造措施進行了較為深入地探索。本文首先應用PKPM軟件對優(yōu)化后的分散筒結構進行內力分析,從整體結構中截取受力較為復雜的項層梁板墻節(jié)點與電梯井轉角節(jié)點進行局部加固,再應用ANSYS有限元分析軟件對加固后的節(jié)點進行數(shù)值模擬分析,對各不同措施下的分析結果進行對比,得出相關結論與實際工程使用建議。本文首先分別對進行過優(yōu)化后的頂層梁板墻節(jié)點與頂層電梯井轉角處節(jié)點進行數(shù)值模擬分析。頂層梁板墻節(jié)點墻體的平面外受彎嚴重,墻體裂縫寬度有貫穿墻體的趨勢。頂層電梯井轉角節(jié)點梁兩側受力鋼筋應力有很大差異,轉角處墻體出現(xiàn)應力集中,混凝土在局部壓碎,受力情況薄弱。針對頂層梁板墻節(jié)點存在的上述問題,本文采取了墻內局部增加槽鋼、墻內局部增加鋼板、墻內局部縱向鋼筋加密三種加強措施,每種措施采用多種鋼材規(guī)格、多種布置方式進行組合,形成大量布置方案,對各節(jié)點方案進行數(shù)值模擬分析。對大量分析結果進行對比研究得出,在節(jié)點墻內設置槽鋼與鋼板能夠會使節(jié)點的變形以及裂縫情況有所改善,但過度的鋼材會產生較大的剛度導致墻體內發(fā)生應力集中,產生新的受力問題,所以在采用以上兩種措施時需要具體問題具體分析,對具體結構進行詳細計算后確定鋼材的規(guī)格與布置方式。墻內局部鋼筋加密的方法能夠更好的解決墻體的開裂問題,并且施工工藝更加簡便,具有工程實際意義。針對頂層電梯井轉角處節(jié)點存在的問題,同樣采取墻內增加鋼板、墻內局部縱向鋼筋加密、墻內增加槽鋼三種加固措施對節(jié)點進行加強。對三種措施下多種方案進行數(shù)值模擬,對結果進行分析可以得出增設鋼板、局部鋼筋加密對節(jié)點的受力情況基本沒有起到改善作用,并且鋼板會致使墻體內出現(xiàn)嚴重的應力集中。墻內增設槽鋼對節(jié)點的變形有一定的改善,但未能解決梁受力筋受力不平衡的問題�？梢缘贸�,對于此處節(jié)點的受力問題需要尋求其他的解決方法。
[Abstract]:The dispersed tube structure system is a new type of structure system suitable for high-rise buildings. The structure distributes the smaller cylinder body as a load-bearing member around the structure. Then through the frame beam and other connecting members each cylinder body is connected to form a whole together to provide side force. The dispersed tube structure system has flexible space arrangement and high area utilization ratio. The vertical distribution of lateral stiffness is uniform. The structure adapts to the development trend of modern high-rise structures. Based on the existing research results, this paper aims at the shape defects of the structural measures studied. That is, all measures in the structure of the formation of protruding, the use of internal space function. Aesthetics and safety have a certain impact. This paper takes this as a starting point to explore the construction measures that do not affect the internal space. Firstly, this paper applies PKPM software to optimize the structure of the dispersed tube. Internal force analysis. From the whole structure, the joints of beam, slab and wall with complicated force are partially strengthened with the corner node of elevator shaft, and then the ANSYS finite element analysis software is used to simulate the strengthened joints. The analysis results under different measures are compared. The conclusions and practical engineering suggestions are obtained. Firstly, numerical simulation analysis of the joints of the top floor beam, slab wall and the top elevator shaft corner after optimization is carried out respectively. Out of plane of the top floor beam, plate wall joint and wall. Severely bent. The crack width of the wall has a tendency to run through the wall. The stress of reinforcing bar on both sides of the corner joint beam of the top elevator shaft is very different. The stress concentration of the wall appears at the corner and the concrete is crushed locally. In view of the above problems existing in the joints of the top beam, slab and wall, three kinds of strengthening measures are adopted in this paper, namely, the local increase of channel steel in the wall, the partial increase of the steel plate in the wall, and the reinforcement of the local longitudinal reinforcement in the wall. Each measure uses a variety of steel specifications, a variety of layout methods to combine to form a large number of layout schemes, each node scheme for numerical simulation analysis. A large number of analysis results are compared and studied. Setting channel steel and steel plate in the joint wall can improve the deformation and crack of the joint, but excessive steel will produce greater rigidity, which will lead to stress concentration in the wall and new stress problem. Therefore, the adoption of the above two measures need specific analysis of specific problems. After the detailed calculation of the concrete structure to determine the steel specifications and layout. The method of local reinforcement encryption in the wall can better solve the cracking problem of the wall and the construction technology is more convenient. In view of the problems existing in the corner of the top elevator shaft, the steel plate is added in the wall and the longitudinal reinforcement in the wall is infilled. Three reinforcement measures are added to the wall to strengthen the joint. Numerical simulation of various schemes under the three measures can result in the addition of steel plate. Local reinforcement encryption has no effect on the joint stress, and the steel plate will cause serious stress concentration in the wall. The addition of channel steel in the wall can improve the deformation of the joint to a certain extent. However, it can not solve the problem of stress imbalance of beam tendons. It can be concluded that other solutions should be found for the stress problems of the joints here.
【學位授予單位】：中國海洋大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU973.17

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