大型火力发电厂框排架混合结构主厂房动力特性试验与分析
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摘要
选取1000MW大型火力发电厂新型混合结构主厂房体系的三跨三榀进行缩尺比为1/7的空间模型试验研究。采用锤击法测试模型结构的动力特性,得到其自振频率和振型,并根据相似关系换算到原型结构。使用SAP2000软件建立混合结构主厂房模型和原型结构的有限元模型,进行模态分析,得到模型和原型结构的频率和振型,并与试验结果进行对比分析。可为大型火力发电厂新型混合结构主厂房体系的抗震性能研究提供依据。
A 1/7 scale space model experiment of three spans and three frames has been carried out,which are made from a new main building with frame-bent structures in 1 000MW large thermal power plants.The natural vibration frequencies and mode shapes of experimental model were obtained with hammering method,and dynamic characteristics of prototype structure are acquired according to similarity relationships.The finite element model of the prototype structure in the main building built with SAP2000 software is used to analyze structural modal.The natural vibration frequencies and mode shapes of the structure are obtained and compared with experimental results.The results provided for a base for study on seismic performance of the main building with frame-bent structures in 1 000MW large thermal power plants.
A 1/7 scale space model experiment of three spans and three frames has been carried out,which are made from a new main building with frame-bent structures in 1 000MW large thermal power plants.The natural vibration frequencies and mode shapes of experimental model were obtained with hammering method,and dynamic characteristics of prototype structure are acquired according to similarity relationships.The finite element model of the prototype structure in the main building built with SAP2000 software is used to analyze structural modal.The natural vibration frequencies and mode shapes of the structure are obtained and compared with experimental results.The results provided for a base for study on seismic performance of the main building with frame-bent structures in 1 000MW large thermal power plants.
引文
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[4]白国良,姜维山,赵鸿铁,等.钢梁—钢筋混凝土柱组合结构厂房的动力性能实测[J].工业建筑,1996,26(4):33-37.
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[7]姚谦峰,陈平.土木工程结构试验[M].北京:中国建筑工业出版社,2001.
[2]李晓文,康灵果,史宏伟,等.引进汽轮发电机组基础动力特性分析[J].建筑结构学报(增刊2),2006,27(10):541-545.
[3]吴涛,白国良,刘伯权.大型火力发电厂钢筋混凝土横向框排架主厂房动力特性试验研究[J].世界地震工程,2004,20(4):157-160.
[4]白国良,姜维山,赵鸿铁,等.钢梁—钢筋混凝土柱组合结构厂房的动力性能实测[J].工业建筑,1996,26(4):33-37.
[5]文良谟.火力发电厂土建结构抗震设计的回顾与展望[J].电力建设,1998,(6):18-24.
[6]郑山锁.动力试验模型在任意配重条件下与原型结构的相似关系[J].工业建筑,2000,30(3):35-39.
[7]姚谦峰,陈平.土木工程结构试验[M].北京:中国建筑工业出版社,2001.
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