Results 21 to 30 of about 288 (80)
Jianzhu Gangjiegou Jinzhan, 2023 大空心率中空夹层钢管混凝土构件的抗撞击性能有其自身特点，利用有限元软件ABAQUS建立考虑初始几何缺陷的中空夹层钢管混凝土构件的侧向撞击模型，对比了不同初始几何缺陷组合下空心率范围为0.2~0.9构件的抗撞击性能；在此基础上讨论了初始几何缺陷对空心率为0.8构件撞击响应的影响，并对影响大空心率构件撞击响应的主要参数进行分析；最后基于参数分析结果和静态荷载作用下的荷载-局部压痕关系，给出大空心率中空夹层钢管混凝土构件在侧向撞击荷载作用下撞击力-局部变形简化预测公式。结果表明：与无几何缺陷构件相比 ...
史艳莉, 魏然, 王文达, 纪孙航
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Jianzhu Gangjiegou Jinzhan, 2023 随着国家乡村振兴战略的实施，农房建设成为美丽乡村建设的重要内容。大力推广绿色装配式冷弯薄壁型钢结构体系，对我国美丽乡村建设及实现“碳达峰碳中和”目标均有助力，冷弯薄壁型钢结构具有自重轻、强度高、装配方便、绿色环保等优势。然而，冷弯型钢受压构件由于其轻质特性，初始几何缺陷对其稳定性影响极大，进而影响整体结构的承载能力，因此国内外学者均对冷弯型钢受压构件的初始几何缺陷进行了相关研究。通过综述缺陷测量技术、缺陷特征分类与分析、几何缺陷仿真及现有数值模拟方法、中美欧规范比较等方面，总结了国内外缺陷已有成果 ...
赵曦, 孙晓燕, 李占杰, 杜鹏飞
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Analysis of the influence of different damage forms on the residual ultimate strength of ship structure [PDF]
ObjectivesShips are essential for waterborne transportation, and the safety of their structures is of utmost importance. However, during operation, ships may encounter various accidents such as collisions and groundings, which may damage the hull ...
Weiguo WU +2 more
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Theoretical and technological concepts of synergistic coal and natural gas extraction [PDF]
There are a large number of overlapping coal and natural gas resources in China, and due to the requirement of resource extraction efficiency, a large number of overlapping coal and natural gas resources need to be extracted synchronously in the same ...
Delin XIN +5 more
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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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Uncertainty analysis of notch stress concentration factors for welded butt joints [PDF]
ObjectivesThis paper focuses on parametric modeling of a typical butt joint and establishes a finite element model with uncertain geometry of the weld seam, aiming to investigate the stress concentration factor Kt at the weld toe of the butt joint with ...
Chunbo ZHEN +4 more
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Research on web stability and human-induced vibration of Concrete filled steel tubular with corrugated steel web composite structure [PDF]
, 2014 波形钢腹板-钢管混凝土组合结构作为一种新型结构，可以发挥钢管混凝土抗压能力强和波形钢腹抗剪能力高的优点，其作为腹板的波形钢还具有自重轻、受力明确、施工方便、美观等优点，使得这种组合结构具有强大的竞争力和广泛的应用前景，作为一种新型结构，前人对其进行的理论与试验研究甚少。为此，本文在侨英人行天桥荷载试验的基础上，建立了该桥的有限元模型，对该桥的波形钢腹板稳定性和人致振动特性进行了有限元分析，并总结规律。本文的工作主要集中在以下几个方面： 通过对侨英人行天桥的荷载试验和有限元分析，结果表明 ...
曾显通
core
Development of a damage model for rapid decompression of O-ring seals in high-pressure and long-distance CO2 pipelines [PDF]
ObjectiveLong-distance pipelines are essential for large-scale CO2 transportation within the Carbon Capture, Utilization, and Storage (CCUS) system, where the reliability of sealing systems directly influences safety and efficiency.
Changjun LI +5 more
core +1 more source
Analysis of optimization characteristics of titanium alloy double layer stiffened cylindrical shell structure under different design requirements [PDF]
ObjectiveIn order to explore the characteristics of optimization design schemes of titanium alloy double layer stiffened cylindrical shell structures under different length-to-diameter ratios and calculation pressures, a mathematical model for the ...
Jun LIU +4 more
core +1 more source
Jianzhu Gangjiegou Jinzhan, 2021 现行《建筑钢结构防火技术规范》(GB 51249—2017)未给出火灾下钢结构的局部稳定设计方法,为了获得轴心受压焊接H形高强Q690钢柱高温下的局部稳定性能,考虑钢材高温下力学性能退化、截面高温下焊接残余应力降低及初始几何缺陷,采用ABAQUS软件建立经试验验证的高温局部稳定分析有限元模型,得到焊接H形高强Q690钢柱在不同温度下的局部屈曲应力和极限应力。研究表明:当温度低于550℃时,钢柱在高温下和常温下屈曲应力具有相同的变化趋势;高温下的残余应力值和初始几何缺陷对屈曲应力有较大的影响 ...
李翔, 王卫永, 于克强
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