摘要
采用通用有限元软件ANSYS,对大型双曲线冷却塔结构的抗震性能进行研究.考虑地基与冷却塔的相互作用效应(SSI效应),分析了桩基、地基土阻尼比对冷却塔结构抗震性能的影响;同时对超大型冷却塔的结构设计提出了一些关注点.分析表明,在考虑SSI效应后,随着地基土阻尼比的增加,地震作用下冷却塔结构的时程响应峰值随之减小;按"中震作用"进行冷却塔截面抗震承载能力设计时,如果考虑SSI效应、取较大的地基土阻尼比进行计算,其结果可能不能满足"小震不坏"的要求.有关成果可为类似工程提供一些参考.
ANSYS is used to study the aseismic performance of the hyperbolic cooling tower.Considering the interaction between foundation and cooling tower,the influence of the pile foundation and soil damping ratio on the structural aseismic performance has been analyzed.Then,some concerns have been put forward to the design of the large scale cooling tower.The analysis shows that with the increase of the soil damping ratio,the response peak of time history of cooling tower's structure is decreased.With medium earthquakes to design aseismic bearing capacity of cooling tower's section,considering the SSI effect and large soil damping ratio,the result can't meet the requirement of 'no damage in small earthquake'.And the conclusions can be used for similar engineering.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2009年第S1期427-431,共5页
Engineering Journal of Wuhan University
关键词
双曲线冷却塔
抗震性能
SSI效应
地基土阻尼比
桩基础
hyperbolic cooling tower
aseismic performance
SSI effect
foundation damping ratio
pile foundation
