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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, 2021 后置钢管式钢筋混凝土柱是一种新型的加固方法,是在外包钢方法、套管约束混凝土方法以及钢管混凝土叠合柱的基础上提出的。采用后置钢管式钢筋混凝土柱对既有钢筋混凝土柱进行加固,是在原有钢筋混凝土柱四周凿出一部分混凝土形成空腔,外包钢板,二者之间的空腔灌浆形成钢管混凝土组合结构,且不改变原有柱的尺寸。在加固施工现场对后置式钢管混凝土加固的柱子进行现场跟踪监测,监测钢管、纵向受力筋和灌浆料的应力变化,研究应力传递规律及轴力分配情况。并用ABAQUS有限元分析软件建模分析对比监测结果。
万凌昕, 肖亚明, 朱华
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Jianzhu Gangjiegou Jinzhan, 2022 为研究钢管超高性能混凝土在标准火灾下的受力性能和破坏机理，建立了钢管超高性能混凝土柱的耐火有限元模型，并重点对比分析了超高性能混凝土与部分其他类型混凝土的热工参数及高温下本构关系的不同对构件温度和耐火极限等的影响，结果表明：钢管超高性能混凝土构件的核心混凝土温度明显高于相应的普通钢管混凝土或钢管高强混凝土构件的核心混凝土温度，且对于不同配合比的超高性能混凝土构件，其核心混凝土温度场也存在一定差异；高温下钢管对核心超高性能混凝土的约束作用可以忽略不计；对于不同长细比的构件 ...
张旭 +4 more
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Jianzhu Gangjiegou Jinzhan, 2021 建立圆形、正方形、圆端形、六边形钢管混凝土柱在火灾下的有限元模型,利用现有试验结果验证有限元模型。基于该模型,研究保护层种类、保护层厚度、截面形状和截面周长等参数对钢管混凝土柱耐火极限的影响。分析表明,试件耐火极限随着保护层厚度和截面周长的增加而增大。厚涂型涂料的防火效果优于砂浆的防火效果。在长细比和截面周长相同的情况下,圆端形钢管混凝土柱的耐火极限高于圆形钢管混凝土柱;六边形钢管混凝土柱的耐火极限优于方钢管混凝土柱;绕强轴破坏的耐火极限略低于绕弱轴破坏的情况。基于周长等效原则,可将圆端形(或六边形 ...
王志滨 +3 more
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Jianzhu Gangjiegou Jinzhan, 2023 在钢管内部分填充混凝土形成的部分填充钢管混凝土柱能提升钢管柱的强度、刚度和抗震性能，适用于桥墩柱和框架中下部柱子。基于验证的精细化有限元分析模型，对部分填充方钢管混凝土柱在轴压和水平荷载共同作用下的受力性能进行了参数分析，主要分析了轴压比（0.1~0.6）、钢管宽厚比（20~50）、钢材强度（Q235~Q690）、混凝土强度（C20~C60）、截面宽度（200~600 mm）和柱子高宽比（4~16）的影响。结果表明：填充率会影响部分填充钢管混凝土柱的破坏模式，随填充率增大 ...
张兴疆, 甘丹, 何明胜
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Study on the support performance of anti-impacting and energy-absorbing concrete-filled steel tube arches in roadways [PDF]
In response to the problem of lack of shrinkable pressure-allowing performance of steel pipe concrete arch in the current roadway support, an anti-impacting and energy-absorbing steel pipe concrete arch structure is designed from the perspective of ...
Dong AN +4 more
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Bearing rule and instability criterion of pier column roadside supports of GER in fully mechanized mining face [PDF]
The stability of the rock mass at the interface between roadside supports and the roof is critical for gob-side entry retaining. To address the issue of 'roof piercing and column failure' caused by instability at the pier-column and roof contact ...
Genshui WU +6 more
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Research on Bearing Capacity of Angle Steel Transmission Tower Subject to Parallel Reinforcement by Fitting Channel Steel [PDF]
, 2023 [Introduction] The existing angle steel transmission tower has been running for many years, and the structural damage leads to the reduction of service performance.
Donghong ZHANG +4 more
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, 2017 In order to study the mechanical properties of early-age concrete-filled steel tube (CFST) under continuous construction process, an experimental investigation on six concrete-filled circular steel tubular short columns under multi-level loading was ...
Bao, Hao +3 more
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Study on damage mechanism and treatment of water sprayed roof in Jurassic stratum roadway [PDF]
, 2023 The roof of the Jurassic main coal seam in western China generally contained low level weak rich water layer, which led to the long-term watering of the roof of the coal roadway especially the roof anchor cable hole and the reduction of the roof ...
Guohui WEN +6 more
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