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近场地震作用下750kV变压器隔震结构地震响应分析

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以某 750 kV变压器为研究对象,采用有限元软件 SAP2000,对远、近场地震作用下 750 kV 变压器隔震前后的地震响应进行时程分析.对比分析近场地震作用和远场地震动作用下 750 kV变压器的设备底部剪力、加速度响应和动力反应放大系数,结果显示隔震后的 750 kV变压器减震系数最小可达 0.35,动力反应放大系数最小可降低为隔震前的 43%,减震效果良好;同时与远场地震作用相比,近场地震作用下 750 kV变压器地震响应均有所增大,对750 kV变压器结构安全存在不利影响.
Seismic Response Analysis of 750 kV Transformer's Isolation Structure Under Near-field Ground Motions
The seismic response time history analysis on a 750 kV transformer was conducted by finite element software SAP2000 before and after base isolation under far-field and near-field seismic ground motions.Base shear forces,accelera-tion responses and dynamic response amplification coefficients before and after isolation under under far-field and near-field seismic ground motions were compared.The results indicated that,after isolation,the minimum damping coefficient of the 750 kV transformer will be 0.35,and the minimum acceleration amplification coefficient can be reduced to 43%of the value which before isolation,indicating good damping effect. Compared with far-field motions,750 kV transformers have larger response to near-field ground motions,thereby impacting negatively on structural safety of 750 kV transformers.

750 kV transformernear-field ground motionsdamping coefficientamplification coefficient

张凯、陈寅、姜文

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湖北省电力规划设计研究院有限公司,湖北 武汉 430040

750 kV变压器 近场地震作用 减震系数 放大系数

2024

电工技术
重庆西南信息有限公司(原科技部西南信息中心)

电工技术

影响因子:0.177
ISSN:1002-1388
年,卷(期):2024.(3)
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