苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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水泥混凝土制品

钢管混凝土轴压短柱数值模型黏性系数取值分析
钢管混凝土轴压短柱数值模型黏性系数取值分析
  • 李 强1,2,魏宏亮1,2,吴星蓉1,2,刘福江1,2
2022年第2期
摘要
引用本文
摘  要:为研究混凝土塑性损伤模型中黏性系数对钢管混凝土轴压短柱极限承载力的影响,采用有限元分析软件ABAQUS,在合理选取材料模型的基础上,验证了模型的可靠性,并以黏性系数为主要参数,对不同截面形式的钢管混凝土轴压短柱极限承载力进行了计算和分析。结果表明:黏性系数对钢管混凝土轴压短柱荷载-变形关系曲线弹性阶段刚度影响不大;随着黏性系数取值的增大,柱构件的极限承载力也随之增大;在给定黏性系数的条件下,采用不同加载位移计算得到的柱构件极限承载力值离散性较大。此外,综合加载位移和黏性系数对承载力值和计算收敛性的影响,给出了适用于不同截面形式的钢管混凝土轴压短柱黏性系数的取值。 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. 
李强,魏宏亮,吴星蓉,等.钢管混凝土轴压短柱数值模型黏性系数取值分析[J].混凝土与水泥制品,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.
钢-玻璃纤维筋混凝土复合管片的生产及应用研究
钢-玻璃纤维筋混凝土复合管片的生产及应用研究
  • 王君菊
2022年第2期
摘要
引用本文
摘  要:为满足轨道交通工程地下联络通道的盾构施工要求,生产了钢-玻璃纤维筋混凝土复合管片,介绍了其结构特点,并从混凝土配合比、玻璃纤维筋的加工定位、混凝土浇筑等方面介绍了管片的生产工艺。此外,通过三环拼装试验验证了成型管片符合相关精度要求。 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.钢-玻璃纤维筋混凝土复合管片的生产及应用研究[J].混凝土与水泥制品,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.
预应力钢筒混凝土管(PCCP)耐久性设计探讨
预应力钢筒混凝土管(PCCP)耐久性设计探讨
  • 阙小平1,钮如嵩2,赵琼芳1
2022年第2期
摘要
引用本文
摘   要:结合预应力钢筒混凝土管(PCCP)产品标准、混凝土结构耐久性设计相关标准和文献,分析了PCCP的工程结构属性、服役环境、结构特点,强调了PCCP耐久性设计的必要性,归纳了PCCP耐久性设计的基本内容,总结了与耐久性相关的PCCP管体结构、环境作用条件、管体混凝土材料、工艺构造以及附加防腐措施等方面的技术要求,提出了不同环境条件下PCCP的耐久性设计思路。 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.
阙小平,钮如嵩,赵琼芳.预应力钢筒混凝土管(PCCP)耐久性设计探讨[J].混凝土与水泥制品,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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