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Jianzhu Gangjiegou Jinzhan为提高钢桁框体系的抗震可恢复性，提出了自复位钢桁框体系的概念，研究了其在脉冲地震下的强度折减系数。以等效单自由度体系表征具有三折线滞回特征的钢桁框体系，选取182条脉冲型地震动对等效单自由度体系进行非线性动力分析，得到包含6 022万个强度折减系数（R）的数据库，揭示了不同滞回参数和脉冲型地震动对强度折减系数的影响规律。此外，借助BP神经网络拟合强度折减系数在地震下的对数正态分布模型参数，并建立了基于概率的钢桁框体系强度折减系数模型。结果表明提出的模型具有较高的准确性。
刘艳芝, 蓝雅云, 颜阳, 柯珂
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Experimental study on mechanical properties of filling-bulk ce-menting combination body [PDF]
, 2023 In order to study the influence of caved rocks in the goaf on the backfilling body in the backfilling mining, uniaxial compression test are carried out on the backfilling body-cemented granular body combination with different granular heights, discrete ...
Bingchao ZHAO +7 more
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Parameter design of coal pillar in highwall mining under action of dynamic-static load [PDF]
, 2023 In view of the application of end slope shearer mining technology to recover a large amount of residual coal, the determination of reasonable width of supporting coal pillar is a key factor whether it can be safely and efficiently popularization and ...
Dong WANG +7 more
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Impact of rainstorm weather on urban road capacity [PDF]
, 2016 The rainstorm weather seriously affects the operation of urban traffic, and the surface gathered water and its obstruction to vision lead to a decrease of road capacity.
Ji, Xun +4 more
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, 2023 水电站跨省跨区送电涉及多省份、多品种、多时间尺度等多维度电量曲线分解，且需要考虑复杂的电网调峰等需求，是电站每月发电运行中亟待解决的重要难题。依托实际工程的生产需求，构建了适合跨省、跨区送电的水电站月度合同电量曲线分解模型，考虑保量保价、保量竞价、市场化三类品种电价差异，以及电网调峰、市场和电站运行复杂约束，提出了多省多品种发电收益总和最大的二次规划目标，并采用混合整数线性规划方法实现了模型高效求解。以溪洛渡右岸水电站为依托工程，通过枯期、汛期两个不同的应用场景进行了模型验证 ...
徐天遥 +6 more
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Dynamic evolution mechanism of water-bearing coal permeability and water film under stress [PDF]
, 2023 To explore coal permeability evolution mechanism under the comprehensive action of multiple factors including stress - adsorption - water and slippage effect, considering the coal deformation induced by stress - adsorption, the expression of water film ...
Bobo LI +3 more
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Jianzhu Gangjiegou Jinzhan, 2023 为提高风电塔架的抗震性能，提出了考虑耗能时序的混合式风电塔架的概念，重点研究了结构抗震设计与评估的关键指标——强度折减系数。利用等效单自由度体系表征具有三线性滞回特征的新型塔架，并基于不同周期和滞回参数组成的变量矩阵，以320条近场地震动作为激励对等效单自由度体系进行了大量非线性动力分析，获取了3 600万个强度折减系数。强度折减系数均值对结构周期及滞回参数敏感，故基于对比研究选取的对数正态分布概率模型，通过多轮非线性回归分析建立了一系列预测方程，从而实现强度折减系数概率谱模型的建立 ...
李红, 柯珂
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Jianzhu Gangjiegou Jinzhan, 2022 为探讨承重保温一体化墙体中保温芯材对墙体抗侧刚度的贡献，在综合考虑芯材泡沫混凝土对钢框架影响的基础上，基于等效斜压杆理论，采用能量守恒原理推导了承重保温一体化墙体结构的抗侧刚度计算公式，比较了折算系数法和特征刚度参数法两类计算斜压杆宽度的方法。结果表明：引入修正系数和折减系数后，折算系数法的计算结果与试验结果吻合较好，可以用于承重保温一体化墙体抗侧刚度的计算。
周学军, 王兴博, 王卫东
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Electricity Transmission Strategy Research Based on Wind-Coal-Battery-Hydrogen-CCUS Multi Energy Coupling and Bundling System [PDF]
, 2023 [Introduction] In order to guarantee urban power supply and offshore wind power utilization without building new power lines, the paper aims to establish a electricity transmission strategy based on wind-coal-battery- hydrogen -CCUS multi energy coupling
Jiamin YIN +7 more
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Jianzhu Gangjiegou Jinzhan, 2021 基于混凝土黏弹性理论,考虑受弯和受压,分别对轴向和弯曲松弛系数建立徐变微分本构和代数本构两套力学方程组。按照高大型组合截面的力学特点,给出合理的简化假设,由微分解反算松弛系数的解析解。为了公式的便洁性和合理性,与微分方程组的精确解进行对比分析,不断调整和修正组合梁松弛系数的计算公式。简化计算公式与微分方程精确解符合良好;偏心约束的松弛系数为轴心约束系数乘以一个考虑偏心的折减系数,钢梁的约束偏心使轴向约束几乎折减为0,轴向松弛系数为常量0.5;与之相反,钢梁对混凝土的弯曲约束很大,几乎为刚性约束 ...
章胜平 +4 more
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