Results 1 to 10 of about 421 (137)
Effect of Soil Conditioner Interface Modification on Migration Characteristics of Saline-Alkali Ions in Irrigation Area of Yellow River [PDF]
, 2023 [Objective] Through the treatment of hydrophilic and hydrophobic by the conditioner, the influence of different interface characteristics of the conditioner on the soil water and salt transport law was explored, and the improvement mechanism of fly ash ...
Chen Xiangyu +5 more
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Effects of Desulfurized Gypsum Applied Combined with Polyglutamic Acid on Improving Saline Soil [PDF]
, 2023 [Objective] The effects of desulfurized gypsum and polyglutamic acid (γ-PGA) improves saline soil were studied in order to provide a theoretical and technical basis for improving saline soil in Northwest China.
Li Hongyi +4 more
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Simulated reconstruction of soil water distribution and isotope fractionation under the influence of AMF inoculation [PDF]
, 2023 Water resources determine the vegetation structure and types in the ecological restoration process, and are the main limiting factor for achieving green production and ecological restoration in mining areas.
Lexuan TIAN, Yinli BI, Zengming KE
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建筑技术研究, 2020 钢管混凝土结构承载力高、施工周期短、耐火性能好,成本较低,在相同的截面尺寸下,比钢结构大约节省50%的钢材,比混凝土结构减少50%的混凝土用量,承载力高主要体现在相同截面尺寸下,钢管混凝土的承载力远远大于钢结构和混凝土结构,具体的原因本文做了详细的阐述。本文采用ansys对方钢管混凝土短柱单向荷载作用下进行非线性分析,对钢管采用shell181单元,核心混凝土采用solid65单元模拟,得出的结论是模拟的极限承载力介于规范和韩林海推荐的公式计算结果之间,且偏差不大,由计算结果对比看出 ...
穿云 罗 +3 more
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设平板加劲肋矩形钢管混凝土柱静载下ABAQUS本构模型的研究
Jianzhu Gangjiegou Jinzhan, 2021 对设平板加劲肋钢管混凝土柱静载下ABAQUS本构模型进行研究。首先对收集的设平板加劲肋钢管混凝土短柱轴压试验进行介绍;从混凝土本构模型、钢材本构模型、钢-混凝土界面黏结模型以及初始缺陷、残余应力的引入等方面入手进行分析;对比分析了Schneider模型、Saenz模型、韩林海模型及陶忠模型四种核心混凝土受压本构关系,在此基础上提出了考虑设肋钢管约束效应的核心混凝土单轴受压应力-应变本构关系;对钢材本构、钢-混凝土界面本构等模型进行了对比分析。通过采用本构模型进行了有限元仿真模拟 ...
李肖, 张元植
doaj
Comparative of 90Sr and 241Am Migration on Unsaturated Silty Clay Medium [PDF]
The studies on the batch experiments and transport of 90Sr and 241Am were respectively conducted under unsaturated flow conditions in silty clay column.
Ai-ming ZHANG +7 more
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Jianzhu Gangjiegou Jinzhan, 2022 为研究高强方钢管高强混凝土偏压长柱力学性能，基于已有的偏压试验研究，进一步分析了偏压柱破坏形态、荷载-挠度曲线、弯矩-曲率曲线和应变发展规律，探讨了偏心率与长细比对构件塑性发展等力学性能的影响。结合ABAQUS数值模拟研究了不同偏心率的偏压柱工作机理，并由此进一步分析了材料性能参数与构件几何参数对偏压柱的受力性能影响。基于试验与数值模拟，采用《钢管混凝土结构技术规范》（GB 50936—2014）和人工神经网络模型对68个试件的极限荷载Pu及其弯矩Mp值进行预测。结果表明，《钢管混凝土结构技术规范 ...
李帼昌 +5 more
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Shuitu Baochi Xuebao, 2022 为了改善黄土高原治沟造地土壤结构较差的问题, 采用一维定水头土柱模拟试验, 探讨了不同有机物料(生物有机肥、粉碎秸秆、50%粉碎秸秆+50%生物有机肥、尿素、对照)对治沟造地土壤湿润锋推移、累积入渗量、入渗速率和土壤水分蒸发特征的影响, 并采用Green-Ampt模型、Philip模型和Kostiakov模型拟合分析土壤水分入渗规律。结果表明: (1)粉碎秸秆与有机肥均降低了土壤水分移动速率, 增强了土壤持水能力; 粉碎秸秆同时降低了土壤稳定入渗速率, 与对照相比减小了17.65%;(2 ...
舒方瑜 +5 more
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Jianzhu Gangjiegou Jinzhan, 2022 为研究新型方钢管混凝土组合L形柱的轴压性能，以钢管厚度、钢材强度和长细比为参数，对5个方钢管混凝土组合L形柱进行轴压试验，分析各试件的破坏模式、极限承载力和荷载-位移曲线；基于Mander约束混凝土本构关系，考虑不同位置钢管对混凝土约束水平的强弱，建立有限元分析模型，并将有限元分析结果与试验结果进行对比，验证了数值模型的准确性，在此基础上提出了方钢管混凝土组合L形柱的轴压强度和稳定承载力计算公式。结果表明：方钢管混凝土组合L形柱具有良好的轴压力学性能，各钢管之间能够协同变形、共同工作 ...
王振 +4 more
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Progress Analysis and Development Prospects of Soil Ecological and Environmental Effects of Interlayer Construction [PDF]
[Objective] This study systematically summarized and analyzed the current application status, technical characteristics, and environmental benefits of interlayer construction in soil improvement, nutrient cycling, ecological restoration, and crop ...
CHEN Jihong +7 more
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