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    蘇州混凝土水泥制品研究院有限公司

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    水泥混凝土制品

    鋼管混凝土軸壓短柱數值模型黏性系數取值分析
    鋼管混凝土軸壓短柱數值模型黏性系數取值分析
    • 李 強1,2,魏宏亮1,2,吳星蓉1,2,劉福江1,2
    2022年第2期
    摘要
    引用本文
    摘 ?要:為研究混凝土塑性損傷模型中黏性系數對鋼管混凝土軸壓短柱極限承載力的影響,采用有限元分析軟件ABAQUS,在合理選取材料模型的基礎上,驗證了模型的可靠性,并以黏性系數為主要參數,對不同截面形式的鋼管混凝土軸壓短柱極限承載力進行了計算和分析。結果表明:黏性系數對鋼管混凝土軸壓短柱荷載-變形關系曲線彈性階段剛度影響不大;隨著黏性系數取值的增大,柱構件的極限承載力也隨之增大;在給定黏性系數的條件下,采用不同加載位移計算得到的柱構件極限承載力值離散性較大。此外,綜合加載位移和黏性系數對承載力值和計算收斂性的影響,給出了適用于不同截面形式的鋼管混凝土軸壓短柱黏性系數的取值。 Abstract: ?In order to investigate the influence of viscosity parameter of concrete damaged plastic model on the ultimate bearing capacity of concrete filled steel tubular stub columns, the finite element analysis software ABAQUS was adopted. The reliability of the model was verified based on reasonable constitutive models of steel and core concrete. Viscosity parameter was taken as the main parameter, the ultimate bearing capacity of concrete-filled steel tubular stub columns under axial compression with different cross-sections was calculated and analyzed. The analysis result indicates that viscosity parameter has little effect on the elastic stiffness of the load-deformation curve of concrete-filled steel tubular stub columns; with the increasing viscosity parameter value, the ultimate bearing capacity of column members gradually rise; under the condition of given viscosity coefficient, the ultimate bearing capacity of column members calculated with different loading displacements has greater discreteness. Comprehensively considering the effect of viscosity parameter and load displacement on ultimate bearing capacity and convergence, the value of viscosity parameter applicable to the different cross-sections of concrete-filled steel tubular stub columns was put forward.?
    李強,魏宏亮,吳星蓉,等.鋼管混凝土軸壓短柱數值模型黏性系數取值分析[J].混凝土與水泥制品,2022(2):41-46. LI Q,WEI H L,WU X R,et al.Analysis on Viscosity Coefficient of Numerical Model of Concrete Filled Steel Tubular Short Columns Under Axial Compression[J].China Concrete and Cement Products,2022(2):41-46.
    鋼-玻璃纖維筋混凝土復合管片的生產及應用研究
    鋼-玻璃纖維筋混凝土復合管片的生產及應用研究
    • 王君菊
    2022年第2期
    摘要
    引用本文
    摘 ?要:為滿足軌道交通工程地下聯絡通道的盾構施工要求,生產了鋼-玻璃纖維筋混凝土復合管片,介紹了其結構特點,并從混凝土配合比、玻璃纖維筋的加工定位、混凝土澆筑等方面介紹了管片的生產工藝。此外,通過三環拼裝試驗驗證了成型管片符合相關精度要求。 Abstract: In order to meet the shield construction requirements of the underground connecting passage of the actual rail transit project, the steel-glass fiber reinforced concrete composite segment was developed, its structural characteristics were introduced, and its production technology was described from the aspects of concrete mix proportion, processing, glass fiber reinforced concrete and machining positioning, concrete pouring and etc. In addition, through the three ring assembly test, it was verified that its accuracy meets the relevant requirements.
    王君菊.鋼-玻璃纖維筋混凝土復合管片的生產及應用研究[J].混凝土與水泥制品,2022(2):38-40,81. WANG J J.Production and Application Research of Steel-glass Fiber Reinforced Concrete Composite Segment[J].China Concrete and Cement Products,2022(2):38-40,81.
    預應力鋼筒混凝土管(PCCP)耐久性設計探討
    預應力鋼筒混凝土管(PCCP)耐久性設計探討
    • 闕小平1,鈕如嵩2,趙瓊芳1
    2022年第2期
    摘要
    引用本文
    摘 ? 要:結合預應力鋼筒混凝土管(PCCP)產品標準、混凝土結構耐久性設計相關標準和文獻,分析了PCCP的工程結構屬性、服役環境、結構特點,強調了PCCP耐久性設計的必要性,歸納了PCCP耐久性設計的基本內容,總結了與耐久性相關的PCCP管體結構、環境作用條件、管體混凝土材料、工藝構造以及附加防腐措施等方面的技術要求,提出了不同環境條件下PCCP的耐久性設計思路。 Abstract: Combined with the product standard of prestressed concrete cylinder pipe(PCCP), relevant standards and documents of concrete structure durability design, the structural attributes, service environment and structural characteristics of PCCP engineering are analyzed, and the necessity of PCCP durability design are emphasized, the basic contents and steps of PCCP durability design are summarized, the PCCP structure, environmental conditions, concrete materials, process structure, anti-corrosion measures and other technical requirements related to durability are concluded. In addition, the design ideas for the durability design of PCCP under different environmental conditions are put forward.
    闕小平,鈕如嵩,趙瓊芳.預應力鋼筒混凝土管(PCCP)耐久性設計探討[J].混凝土與水泥制品,2022(2):32-37. QUE X P,NIU R S,ZHAO Q F.Discussion on Durability Design of Prestressed Concrete Cylinder Pipe(PCCP)[J].China Concrete and Cement Products,2022(2):32-37.
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