Results 11 to 20 of about 531 (119)
Gaoya dianqi, 2022 作为换流站中的重要组成部分，直流场极母线回路的抗震性能直接影响到特高压输电线路的安全运行。为评估某±800 kV换流站中直流场极母线回路的抗震性能，文中建立了包含众多不同种类电气设备的极母线回路有限元模型，对其进行了动力特性分析和三向地震时程分析，通过与单体设备的地震响应对比得出了回路中的抗震薄弱位置和关键设备。并采用多样条的易损性分析方法结合多元非线性回归函数最小二乘拟合得到了回路和关键设备的地震易损性曲线，分析结果显示该回路在设防烈度（地面运动加速度峰值为0.4g）地震作用下失效概率已超过90 ...
田松丰, 李强, 张世洪, 续兴
doaj
Analysis and discussion on potential earthquake hazards of gymnasiums in Zhejiang Province [PDF]
In order to improve the seismic resistance of infrastructure and reduce the seismic disaster risk of important infrastructure, based on the results of earthquake disaster risk census in Zhejiang Province, comprehensively considering the construction age,
Jianbo Lu, Luoyi Gu, Yifei Zhu
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Research on Design and Influence on Performance of Expansion Joint for High-temperature Sodium Pipe [PDF]
Expansion joints are installed on the sodium pipelines of fast reactor power stations to absorb the displacement for thermal compensation. This can reduce the difficulty in the layout of pipelines, supports and hangers, effectively shorten the length of ...
LIANG Shengying, LIU Kai, WANG Guozhi, LIU Yizhe
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Seismic motion input methods of viscous-elastic boundary and numerical simulation of seismic response on large diameter tunnels [PDF]
To determine the selection of input wave field at the bottom of the viscous-elastic boundary, and study the seismic response of two parallel large-diameter shield tunnels, corresponding numerical models were established for analysis.
Liping Jing +3 more
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Jianzhu Gangjiegou Jinzhan, 2022 提出一种适用于自复位钢木混合剪力墙结构的直接基于位移的设计方法，并设计了一栋6层自复位钢木混合剪力墙结构，通过非线性时程分析对设计方法的合理性进行了验证。进一步选取50条地震动记录进行结构的非线性时程分析，研究了结构在地震作用下的损伤状态。基于云图法的易损性分析，获得了6层自复位钢木混合剪力墙结构针对不同性能目标的易损性曲线，研究了自复位系数对结构易损性的影响。研究结果表明：直接基于位移的设计方法适用于自复位钢木混合剪力墙结构的分析，且可设置结构最大层间位移角和最大残余层间位移角为性能目标 ...
吕兆华, 陈飞, 李征
doaj
Stress assessment and control measures for deformed tunnel-crossing pipeline section [PDF]
Objective It is common for long-distance oil and gas pipelines to traverse mountain tunnels. The sections of pipelines passing through tunnels are susceptible to significant deformation due to internal pressure and temperature effects during the ...
Chunbin QIU
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Complex Network Analysis on Fire Risk Evolution of Hazardous Chemical Tanks
, 2018 In order to control fire chain risk of hazardous chemical tanks, a method of risk analysis and control on fire evolution of hazardous chemicals is proposed based on the complex networks theory.
Jing-jing Li, Xiao-ying Xu, Xuanya Liu
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Study on Seismic Strengthening of Frame Structure of School Buildings [PDF]
, 2011 中国的中小学校舍几乎是目前世界上日常使用时间最长，人口密度最大的建筑物。而中小学生逃生能力较差，如果地震突发，容易造成很大的伤亡。在2008年汶川大地震中，中小学楼房垮塌严重，造成广大师生伤亡和巨大财产损失，在社会上影响很大。为了防御和减小地震灾害损失，研究既有中小学校舍建筑的抗震安全性能，寻找安全可靠、经济合理的加固方法具有重要现实意义。 本文在国内外相关研究理论和方法的基础上，综合相关的文献资料和工程实践经验，对现有中小学校舍做以下几个方面的研究： 首先对既有的中小学校舍进行抗震性能现状调查 ...
袁兴仁
core
Study on infrasonic leakage monitoring and signal processing for product oil pipeline [PDF]
Objective With the total length of oil and gas transmission pipelines increasing due to booming development, pipeline leakage monitoring has emerged as one of the critical technologies to ensure the safe and stable operation of these pipelines ...
Chen ZHANG +7 more
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Gaoya dianqi, 2022 电流互感器是变电站系统中的重要设备之一，在地震中往往容易遭受损坏，其中瓷套管根部断裂是电流互感器破坏的典型特征。目前，学者多采用数值模拟方法分析电流互感器的抗震性能，试验研究开展较少，且很少直接考虑支架的动力放大效应。文中考虑安装支架的动力影响对110 k V电流互感器进行振动台试验研究，测定了设备的自振频率和阻尼比，获得了设备关键部位的加速度和应变响应，基于试验结果进一步建立了电流互感器的地震易损性模型。研究结果表明，电流互感器的抗震性能较强，在1.0g地震输入下可保证结构完好。
李吉超, 李海洋, 尚庆学, 王涛
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