Results 21 to 30 of about 915 (148)
, 2008 提出一种分析管线地基极限承载力的平面应变有限元模拟方法,采用自适应网格技术和接触对算法模拟管线嵌入土体的准静态过程,利用修正Drucker-Prager/Cap本构模型模拟土体塑性。研究不同土性和管土界面摩擦条件下,管线地基土体的塑性变形及位移场特性。利用载荷沉降曲线并结合地基塑性应变分布图和位移矢量图,可判别管线地基的剪切破坏型式 ...
赵波, 雒承才, 高福平
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波形钢腹板钢管混凝土模型拱面内极限承载力试验研究 [PDF]
, 2010 进行了波形钢腹板钢管混凝土模型拱的面内两点非对称和对称加载试验。对模型拱的挠度、钢管应变、波形钢腹板应变、极限承载力等进行了分析。试验结果表明:波形钢腹板钢管混凝土拱是一种受力性能很好的新型组合拱。在这种结构中,波形钢腹板与钢管混凝土弦杆均能发挥其各自的优势。它与钢管混凝土单圆管和哑铃形拱相比,刚度与承载力有了很大提高;与钢管混凝土桁拱相比,避开了节点破坏问题,模型拱呈总体破坏特征,从而使其延性与极限承载力明显提高。有限元分析表明:在承载力分析中应考虑双重非线性的影响 ...
陈宝春, 高婧
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Jianzhu Gangjiegou Jinzhan, 2022 为研究混凝土强度、含钢率等参数对方矩形钢管约束超高强混凝土短柱轴压承载力的影响，并探讨现有承载力计算方法的适用性，采用已验证的有限元模型，对方矩形钢管约束混凝土短柱轴压极限承载力进行参数分析，根据计算结果对现有承载力计算方法开展精度评估，并对承载力计算方法进行了修正。研究发现：随着混凝土强度的提高，套箍力系数相同时，约束效果趋于降低，内填超高强度混凝土构件的约束效果受含钢率、倒角率影响较小；矩形钢管约束混凝土短柱的约束效果随着长短边边长比值的增加而降低；由于混凝土强度提高，约束效果下降 ...
韦建刚, 张瀚文, 罗霞, 杨艳
doaj
Mechanical mechanism and parameters sensitivity analysis of the steel frame-geotextile system for the pre-reinforcement of flow plastic soil [PDF]
In reclamation projects for port construction, the pre-reinforcement of flow plastic fill soils is critical for promoting deep drainage consolidation and enhancing subgrade bearing capacity.
Jianing HUANG +5 more
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Bearing characteristics of variable diameter micropile based on the improvement of group pile foundation [PDF]
To improve the load-bearing of transmission tower micropile foundation and reduce the material cost, a modified variable diameter micropile foundation type based on group micropile is proposed in this study.
Bin DONG +5 more
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Research on the Influence of Pile Shoe Insertion and Removal on the Neighboring Three-Cylinder Jacket Foundation in Clay [PDF]
[Introduction] The construction process of pile insertion and removal for installing offshore wind turbines on mobile platforms is risky, which can easily affect the working performance of adjacent infrastructure, and even lead to its instability and ...
Di HAO +3 more
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Jianzhu Gangjiegou Jinzhan, 2021 针对中德两国规范关于带部分螺纹的螺杆伸入螺孔中的普通螺栓连接构件,在受静态剪力的作用下,其承载力的计算规定的不同情况,设计了18个试件在不同的螺纹伸入螺孔中深度的单剪单螺栓连接试验,分析螺纹伸入螺孔中的深度对连接承载性能的影响。并运用有限元建模方法,改变螺纹伸入螺孔中的深度、螺栓直径和连接板的厚度进行参数分析。结果表明,有限元分析得到的极限承载力、荷载-位移曲线和破坏形式与试验结果吻合良好,为参数分析提供依据;当螺纹伸入螺孔中的深度为0.88t(t为连接板的厚度)时 ...
徐忠根, 陈千, 邓长根, 陈荣毅
doaj
Comparative Analysis of Slenderness Ratio Calculation Methods of Cross Bracings for Towers Between China and EU Overhead Transmission Line Standards [PDF]
, 2023 [Introduction] This paper aims to effectively avoid the design quality problems caused by the difference between domestic and foreign engineering design specifications. The study makes comparative analysis of slenderness ratio of cross bracings for angle
Hongliang GUO +3 more
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Jianzhu Gangjiegou Jinzhan, 2019 现有《钢结构设计规范》公式没有明确反映偏心距对节点承载力的影响。为了考察偏心距对钢管K形相贯节点的承载力的影响规律,建立偏心钢管相贯节点有限元模型,研究偏心相贯节点的受力机理;同时分析主管轴压力、加劲肋对节点承载力的影响规律。分析结果表明:偏心节点和无偏心节点破坏模式基本相同;偏心距影响节点承载力,负偏心增大有利于提高节点的极限承载力,正偏心降低节点极限承载力;而且相对正偏心而言负偏心对极限承载力影响更大。相贯节点的承载力模拟值比规范计算值大10%～30%,即规范公式计算结果偏于保守。
王龙飞, 戴岳, 张大长
doaj
Full-scale experimental study on load-deformation characteristics of prebored grouted planted piles in soft ground [PDF]
Prebored grouted planted piles can effectively utilize strengthes of precast pile shafts. To clarify the influence of different construction techniques on the load transfer mechanism of composite piles, this study conducted full-scale static load tests ...
WANG Weidong1, 2 , YANG Yu1, WU Jiangbin1, 2 , MENG Wang1, 2, QIAN Jiangu1, LIN Cheng3
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