Jianzhu Gangjiegou Jinzhan, 2013 为研究正弦波纹腹板工字钢梁的受弯性能,设计了此种钢梁的受弯试验,并采用有限元方法对其受弯性能进行了数值模拟,然后对其抗弯承载能力进行了理论分析。分析结果表明,波纹腹板工字钢梁表现出较好的抗弯变形能力,并且具有良好的塑性性能;波纹腹板工字钢梁在竖向荷载作用下波纹腹板几乎不产生任何弯曲正应力,弯矩基本由翼缘承担;波纹腹板工字钢梁的极限弯矩可由近似的截面受弯承载力公式求得。
周学军 +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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Interaction study on surrounding rock and bolting-shotcrete U-shaped steel support structure in deep soft rock roadway [PDF]
Convergence-constraint method is a design approach for underground engineering structures that combines theoretical analysis, field measurements, and engineering experience.
Bin LIU +6 more
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Orthogonal optimization of the ratio of nano-silica sol-EVA-fly ash cement-based composite slurry and the effect on its physical properties [PDF]
To address the problem that traditional cement-based slurry materials cannot meet the actual demand for grouting and reinforcement of large deformation roadways in coal mines, some high-performance composite slurry materials are obtained by modifying ...
Chang XIAO +8 more
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Coal roadway rapid driving technology and equipment with integrated drilling and anchoring and its application [PDF]
This paper analyzes the current situation and existing problems of coal roadway driving technologies and equipment, introduces the new mode, technology, equipment of coal roadway rapid driving with integrated drilling and anchoring and its underground ...
Chang LIU +13 more
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Research progress of support theory and technology of the roadway surrounding rock based on the plastic zone control [PDF]
With the increasing depth of coal mining, the stability control of surrounding rock in deep roadway has become one of major problems in the mining field, and the effect of surrounding rock control in deep roadway is directly related to the safe ...
Lei FAN +3 more
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Development and prospect of freezing shaft lining technology for vertical mine shafts in China [PDF]
This paper delves into the formidable challenges posed by the trends of “deepening” and “scaling up” in the design, construction, and operation of deep mine shafts in China.
Chi ZHANG +10 more
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Jianzhu Gangjiegou JinzhanU形钢板阻尼器具有耗能能力良好、能够依靠自身变形耗能，以及性能稳定、制作方便、价格低廉等优点，但是也存在初始刚度小和承载能力低的问题。为此，提出一种具有T形截面的U形金属屈服阻尼器（简称阻尼器）。基于虚功原理和卡斯蒂利亚诺第二定理，建立了阻尼器的屈服承载力和初始刚度理论公式。基于非线性混合强化本构模型和三维延性断裂准则，建立了考虑材料延性断裂的阻尼器有限元模型。重点考察了阻尼器的刚度、屈服承载力、耗能能力和破坏模式等。通过参数分析量化了几何尺寸等参数对阻尼器力学性能的影响。研究表明，阻尼器在刚度 ...
邱灿星, 钱慧娟, 王苑佐
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Jianzhu Gangjiegou Jinzhan, 2015 为考察利用钢板剪力墙耗能的自复位结构的抗震性能,通过理论分析和有限元模拟,研究钢板剪力墙厚度和钢绞线的预拉力对结构的影响。对结构受力性能进行分析,得到结构的理论复位刚度值。采用有限元对模型试件在循环荷载作用下的抗震性能进行模拟,通过对所得滞回曲线、结构耗能性能、骨架曲线、结构水平承载力、抗侧刚度及延性的分析,了解各个影响因素对结构的作用并与理论计算进行对比。结果表明:随着钢板剪力墙厚度的增加,结构在相同循环荷载作用下,每次循环的耗能量增加,承载力显著增大,延性更优,但是结构的复位能力逐渐变差 ...
朱昱, 李启才, 纪瑞
doaj
[Three-dimensional finite element analysis of the cantilever fixed bridge restoration for mandibular central incisors supported by narrow-diameter implants]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiZhou X, Gong Y, Peng W, Fu G.
europepmc +1 more source