本文選題：鋼管混凝土 + 分段模型��； 參考：《華北理工大學》2017年碩士論文

【摘要】：裝配式鋼-混凝土結構體系不可避免需要大量的節(jié)點、水平接縫、豎向接縫,這些節(jié)點和接縫的設計直接影響著結構的合理受力和整體抗震性能。裝配式鋼管混凝土組合剪力墻結構體系是蘇幼坡教授的科研團隊提出的一種新型結構體系,其中鋼管混凝土節(jié)點的可靠連接是首先需要解決的難題。文中對其新型裝配式鋼管混凝土柱節(jié)點連接進行了軸壓和局部承壓性能的理論分析和數值研究,基于有限元計算平臺建立分段模型予以實現(xiàn)。通過節(jié)點構件的試驗結果,校核和驗證模型關鍵參數,主要內容包括:1)將國內外8部關于鋼管混凝土在軸向壓力作用下的承載力設計規(guī)程進行歸納對比,并分別從多角度分析其公式間的差異性,通過具體算例進行對比研究。結果表明,國外規(guī)程對于極限承載力的設計偏于保守,我國規(guī)程計算的結果相比于其他4個國家更接近試驗實測結果。2)基于Open SEES,建立鋼管混凝土短柱和圓中空夾層鋼管混凝土短柱的全截面受壓模型,將計算結果和試驗結果進行對比。在該模型的基礎上,對關鍵參數進行分析。結果表明,增大核心混凝土強度、套箍系數和鋼管屈服強度,減小徑厚比,可提高圓鋼管混凝土試件的極限承載力;增大空心率和外鋼管徑厚比,減小長細比,可增大圓中空夾層鋼管混凝土試件的極限承載力。3)建立圓鋼管約束高強灌漿料局部承壓的分段模型,基于ABAQUS軟件,對比分析了不同因素影響下節(jié)點連接的敏感度。結果表明,圓鋼管約束高強灌漿料在局部承壓作用下的極限承載力,隨試件高徑比、鋼管壁厚和高強灌漿料強度的增大而增大;圓鋼管約束高強灌漿料在局部沖壓作用下的極限承載力,隨沖切角、鋼管高度和鋼管壁厚的增大而增大。
[Abstract]:It is inevitable that a large number of joints, horizontal joints and vertical joints are needed in the fabricated steel-concrete structure system. The design of these joints and joints directly affects the reasonable force and overall seismic performance of the structure. The fabricated concrete filled steel tubular composite shear wall structure system is a new type of structure system proposed by Professor Su Youpo's research team. The reliable connection of concrete-filled steel tubular joints is the first difficult problem to be solved. In this paper, the theoretical analysis and numerical study on the axial compression and local bearing capacity of the new fabricated concrete-filled steel tubular (CFST) connections are carried out, and the segmented model is established based on the finite element calculation platform. Through the test results of joint members, checking and verifying the key parameters of the model, the main contents include: 1) the design rules for bearing capacity of concrete-filled steel tube (CFST) under axial pressure are summarized and compared with 8 parts at home and abroad. The differences between the formulas are analyzed from different angles, and compared with each other by concrete examples. The results show that the design of the ultimate bearing capacity of foreign codes is conservative. Compared with the other four countries, the calculated results in China are closer to the experimental results. 2) based on Open SEESs, the full section compression models of concrete filled steel tubular columns and hollow sandwich filled steel tubular concrete filled steel tubular short columns are established. The calculated results are compared with the experimental results. Based on the model, the key parameters are analyzed. The results show that the ultimate bearing capacity of the concrete specimens can be increased by increasing the strength of the core concrete, the hoop coefficient and the yield strength of the steel tube, the ratio of diameter to thickness can be increased, the ratio of the diameter to thickness of the outer steel tube will be increased, and the ratio of the length to the thickness can be decreased. The ultimate bearing capacity of concrete-filled circular hollow sandwich steel tube specimens can be increased. 3) the sectional model of local bearing capacity of circular steel tube confined high strength grouting material is established. Based on ABAQUS software, the sensitivity of joint connection under different factors is compared and analyzed. The results show that the ultimate bearing capacity of high strength grouting material confined by circular steel pipe under local pressure increases with the increase of the ratio of height to diameter, the wall thickness of steel tube and the strength of high strength grouting material. The ultimate bearing capacity of circular steel tube confined high strength grouting material under local punching increases with the increase of punching angle, steel pipe height and steel pipe wall thickness.
【學位授予單位】：華北理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU398.9

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本文編號：1885512