摘要
现有的空冷支架结构抗震设计方法没有明确考虑设备在地震中的使用安全性,不符合"投资效益"准则。通过空冷支架结构的抗震性能试验研究,给出适合该类结构-设备耦合体系在地震作用下的性能水平,提出考虑设备使用安全性的空冷支架结构抗震性能目标量化值,并建立一种适用于该类结构体系的基于位移的抗震设计方法和步骤。最后,以某1 000 MW空冷支架结构为例进行基于位移的抗震设计,并采用非线性动力时程分析对提出的基于位移的设计方法进行验证。结果表明,提出的基于位移的抗震设计方法较为合理。
The existing seismic design methods of air-cooled condenser structure do not meet the"investment benefit"criterion because they do not consider the safety of the equipment in earthquake. Through the experimental study on the seismic performance of the structure,performance levels and quantified values of the structure were given,which were suitable for the structure-equipment coupled system,the design methods and steps were established. Finally,displacement-based seismic design method was used to analyze a 1 000 MW air-cooled condenser structure,and the nonlinear dynamic time history analysis was taken for validation. The results showed that displacement-based seismic design method was reasonable.
引文
[1]李红星.大型火力发电厂空冷支架结构体系抗震性能试验研究[D].西安:西安建筑科技大学,2006.
[2]姚蔚,梁培新,张翼虎.基于性能的变电站抗震设计研究[J].工业建筑,2012,42(S1):158-162.
[3]朱丽华,白国良,李晓文,等.基于主子系统耦合效应的直接空冷结构体系抗震性能研究[J].土木工程学报,2009,42(2):58-64.
[4]姚泽良,白国良,党发宁,等.钢桁架-钢筋混凝土管柱结构抗震性能研究[J].建筑结构学报,2011,32(1):30-36.
[5]代慧娟,刘林,赵立涛,等.新型空冷支架结构体系抗震性能的理论分析[J].世界地震工程,2011,32(1):108-114.
[6]梁兴文.结构抗震性能设计理论与方法[M].北京:科学出版社,2011:23-25.
[7]尹龙星,白国良,李红星,等.火电厂主厂房结构试验及基于位移的设计方法研究[J].工业建筑,2012,42(9):56-60.
[8]Vidie T,Fajfar P,Fischinger M.Consistent Inelastic Design Spectra:Strength and Displacement[J].Earthquake Engineering and Structural Dynamics,1994,25(3):28-36.