本文關(guān)鍵詞：分散筒結(jié)構(gòu)墻梁節(jié)點(diǎn)局部增強(qiáng)構(gòu)造措施研究　出處：《中國海洋大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

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【摘要】：分散筒結(jié)構(gòu)體系是一種適用于高層建筑的新型結(jié)構(gòu)體系。該結(jié)構(gòu)將尺寸較小的筒體作為承重構(gòu)件分散布置于結(jié)構(gòu)的四周,再通過框架梁等連接構(gòu)件將各個(gè)筒體連接起來形成一個(gè)整體,共同提供抗側(cè)力。分散筒結(jié)構(gòu)體系具有空間布置靈活、面積利用率高、抗側(cè)剛度豎向分布均勻等特點(diǎn)。該結(jié)構(gòu)適應(yīng)于現(xiàn)代高層結(jié)構(gòu)的發(fā)展趨勢。本文在已有的研究成果的基礎(chǔ)之上,針對(duì)已研究構(gòu)造措施的外形缺陷,即各措施均在結(jié)構(gòu)內(nèi)部形成凸起,對(duì)內(nèi)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(diǎn)對(duì)不影響內(nèi)部空間的構(gòu)造措施進(jìn)行了較為深入地探索。本文首先應(yīng)用PKPM軟件對(duì)優(yōu)化后的分散筒結(jié)構(gòu)進(jìn)行內(nèi)力分析,從整體結(jié)構(gòu)中截取受力較為復(fù)雜的項(xiàng)層梁板墻節(jié)點(diǎn)與電梯井轉(zhuǎn)角節(jié)點(diǎn)進(jìn)行局部加固,再應(yīng)用ANSYS有限元分析軟件對(duì)加固后的節(jié)點(diǎn)進(jìn)行數(shù)值模擬分析,對(duì)各不同措施下的分析結(jié)果進(jìn)行對(duì)比,得出相關(guān)結(jié)論與實(shí)際工程使用建議。本文首先分別對(duì)進(jìn)行過優(yōu)化后的頂層梁板墻節(jié)點(diǎn)與頂層電梯井轉(zhuǎn)角處節(jié)點(diǎn)進(jìn)行數(shù)值模擬分析。頂層梁板墻節(jié)點(diǎn)墻體的平面外受彎嚴(yán)重,墻體裂縫寬度有貫穿墻體的趨勢。頂層電梯井轉(zhuǎn)角節(jié)點(diǎn)梁兩側(cè)受力鋼筋應(yīng)力有很大差異,轉(zhuǎn)角處墻體出現(xiàn)應(yīng)力集中,混凝土在局部壓碎,受力情況薄弱。針對(duì)頂層梁板墻節(jié)點(diǎn)存在的上述問題,本文采取了墻內(nèi)局部增加槽鋼、墻內(nèi)局部增加鋼板、墻內(nèi)局部縱向鋼筋加密三種加強(qiáng)措施,每種措施采用多種鋼材規(guī)格、多種布置方式進(jìn)行組合,形成大量布置方案,對(duì)各節(jié)點(diǎn)方案進(jìn)行數(shù)值模擬分析。對(duì)大量分析結(jié)果進(jìn)行對(duì)比研究得出,在節(jié)點(diǎn)墻內(nèi)設(shè)置槽鋼與鋼板能夠會(huì)使節(jié)點(diǎn)的變形以及裂縫情況有所改善,但過度的鋼材會(huì)產(chǎn)生較大的剛度導(dǎo)致墻體內(nèi)發(fā)生應(yīng)力集中,產(chǎn)生新的受力問題,所以在采用以上兩種措施時(shí)需要具體問題具體分析,對(duì)具體結(jié)構(gòu)進(jìn)行詳細(xì)計(jì)算后確定鋼材的規(guī)格與布置方式。墻內(nèi)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(shí)際意義。針對(duì)頂層電梯井轉(zhuǎn)角處節(jié)點(diǎn)存在的問題,同樣采取墻內(nèi)增加鋼板、墻內(nèi)局部縱向鋼筋加密、墻內(nèi)增加槽鋼三種加固措施對(duì)節(jié)點(diǎn)進(jìn)行加強(qiáng)。對(duì)三種措施下多種方案進(jìn)行數(shù)值模擬,對(duì)結(jié)果進(jìn)行分析可以得出增設(shè)鋼板、局部鋼筋加密對(duì)節(jié)點(diǎn)的受力情況基本沒有起到改善作用,并且鋼板會(huì)致使墻體內(nèi)出現(xiàn)嚴(yán)重的應(yīng)力集中。墻內(nèi)增設(shè)槽鋼對(duì)節(jié)點(diǎn)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(duì)于此處節(jié)點(diǎn)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(xué)位授予單位】：中國海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU973.17

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