Research progress of microbial reinforcement technology [PDF]
Biological reinforcement is a new branch that has developed in the field of engineering geology in recent years, among which, the microbially induced calcium carbonate precipitation (MICP) reinforcement technology is an effective method.
Long XU +5 more
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Jianzhu Gangjiegou Jinzhan为研究内置T肋圆管钢桥墩在承受恒定竖向荷载和水平往复荷载作用下的极限承载力和延性性能。文中首先通过与既有试验结果对比，验证所采用有限元分析方法的准确性，然后对内置8根T肋圆管钢桥墩试件进行有限元建模分析，研究正则化径厚比、钢桥墩正则化长细比、纵向加劲肋正则化长细比、轴压比等参数对钢桥墩极限承载力与延性性能的影响规律；最后基于参数化分析结果提出了预测该类钢桥墩极限承载力和延性性能的计算公式。结果表明：随着正则化径厚比、钢桥墩正则化长细比、纵向加劲肋正则化长细比及轴压比的增大，钢桥墩顶部水平荷载 ...
上官城鑫, 高圣彬, 董江磊
doaj
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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Research on the time-dependent stability of filling paste under the action of different concentrations of chloride salts [PDF]
In order to study the time-dependent characteristics of filling paste under the action of mine water, chloride salt solutions with mass fraction of 0%, 5%, 10%, and 15% were prepared, and chloride salt dry wet cycle tests with erosion cycles of 4, 8, 12,
Shuaiqian LI, Zhaowen DU, Zhuoyue WEN
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Analysis of collapse modes of stiffened panels subjected to combined axial and lateral loads [PDF]
ObjectiveThis study analyzes the influence of lateral loads on the ultimate strength and collapse modes of stiffened panels subjected to combined loads.
Deyu WANG, Guangyu GUO, Jinju CUI
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Jianzhu Gangjiegou Jinzhan, 2017 梁柱全焊节点在建筑钢结构中广泛应用,其火灾后受力性能对整个结构灾后承载安全至关重要。通过5个梁柱全焊节点试件高温冷却后的低周反复加载试验,研究了高温过火对其承载力、延性和耗能能力的影响规律。试验过火温度介于500800℃之间,冷却方式为自然冷却。试验结果表明,所有试件均发生梁柱翼缘对接焊缝处的断裂破坏。高温冷却后试件的抗弯承载力较未过火试件有所降低,延性和耗能能力有所提升,变化幅度统一呈现随过火温度的升高先增大后减小的变化规律。当过火温度为700℃时,节点承载力降低最大,降低幅度约为20 ...
陈颖, 朱美春, 程亮
doaj
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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