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    蘇州混凝土水泥制品研究院有限公司

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    房建材料及制品

    配筋超高性能混凝土梁抗彎性能有限元分析
    配筋超高性能混凝土梁抗彎性能有限元分析
    • 宋 斌,劉 芳
    2022年第6期
    摘要
    引用本文
    基于ABAQUS有限元軟件,采用混凝土塑性損傷(CDP)模型模擬了超高性能混凝土(UHPC)的本構關系,使用三維實體單元和桁架單元模擬了UHPC和縱筋之間的接觸關系,研究了配筋率、截面有效高度與截面高度比值和UHPC抗拉強度對UHPC梁抗彎性能的影響。結果表明:隨著配筋率的提高和截面有效高度與截面高度比值的增大,UHPC梁的屈服荷載、峰值荷載以及對應的撓度均明顯提高;隨著UHPC抗拉強度的增大,UHPC梁的峰值荷載和屈服荷載增大,但峰值荷載和屈服荷載對應的撓度減小。 Based on ABAQUS finite element software, the constitutive relationship of ultra-high performance concrete (UHPC) was simulated by concrete damage plasticity(CDP) model, and the contact relationship between UHPC and longitudinal reinforcement were simulated by three-dimensional solid element and truss element. The effects of reinforcement ratio, the ratio of effective section height to section height and UHPC tensile strength on the flexural performance of UHPC beam were studied. The results show that the yield load, peak load and corresponding deflection of UHPC beam increase significantly with the increase of reinforcement ratio and the ratio of effective section height to section height. With the increase of UHPC tensile strength, the peak load and yield load of UHPC beam increase, but the deflections corresponding to peak load and yield load decrease.
    宋斌,劉芳.配筋超高性能混凝土梁抗彎性能有限元分析[J].混凝土與水泥制品,2022(6):58-61. SONG B,LIU F.Finite Element Analysis of Flexural Performance of Reinforced Ultra-high Performance Concrete Beams[J].China Concrete and Cement Products,2022(6):58-61.
    陶粒泡沫混凝土輕質隔墻板研究
    陶粒泡沫混凝土輕質隔墻板研究
    • 項澤強1,唐 昊1,呂澤文1,顏小波1,梁澤鋒2,孟志武1
    2022年第6期
    摘要
    引用本文
    項澤強,唐昊,呂澤文,等.陶粒泡沫混凝土輕質隔墻板研究[J].混凝土與水泥制品,2022(6):62-65. XIANG Z Q,TANG H,LYU Z W,et al.Study on Ceramsite Foamed Concrete Light Weight Panels for Partition Wall[J].China Concrete and Cement Products,2022(6):62-65.
    基于細觀特征的泡沫混凝土導熱系數有限元模擬
    基于細觀特征的泡沫混凝土導熱系數有限元模擬
    • 蔣 俊1,黨文婧1,管小軍2,石友安3,徐田圓1,吳艷萍2,劉 鐵2,李睿智3, 金 超2,李 軍1,盧忠遠1,張魁寶1
    2022年第6期
    摘要
    引用本文
    在泡沫混凝土孔結構實測參數的基礎上,基于隨機算法構建了泡沫混凝土代表性體積單元(RVE)模型,結合voxel網格技術,在周期性邊界條件下模擬了泡沫混凝土的傳熱。結果表明:基于球體隨機產生算法構建的RVE模型與泡沫混凝土的實測孔結構特征高度一致,孔徑分布平均偏差最高為-2.0%,孔隙率平均偏差為-0.1%;基于voxel網格技術在周期性邊界條件下求解出的泡沫混凝土導熱系數模擬值與實測值的平均偏差僅為-3.1%,具有良好的可靠性。 Based on the measured pore structure parameters of foamed concrete, the representative volume element (RVE) model of foamed concrete was established based on randomized algorithm. Combined with voxel grid technology, the heat transfer of foamed concrete was simulated under periodic boundary conditions. The results show that the RVE model based on randomized ball generation algorithm is highly consistent with the measured pore structure characteristics of foamed concrete, the maximum average deviation of pore size distribution is -2.0%, and the average deviation of porosity is -0.1%. The average deviation between the simulated and measured values of thermal conductivity of foamed concrete based on voxel grid technology under periodic boundary conditions is only -3.1%, which has good reliability.
    蔣俊,黨文婧,管小軍,等.基于細觀特征的泡沫混凝土導熱系數有限元模擬[J].混凝土與水泥制品,2022(6):66-70. JIANG J,DANG W J,GUAN X J,et al.Finite Element Simulation on Thermal Conductivity of Foamed Concrete Based on Mesoscopic Characteristics[J].China Concrete and Cement Products,2022(6):66-70.
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