摘要
半地下贮液池作为一种特殊的地下结构,在地震作用下可能发生的震害也较为多样。该半地下贮液池结构复杂,有限元模型单元和节点数量多,难以采用时程分析法进行计算;拟静力法计算简单,但不能得出结构在动态的地震波下的最大响应,因此提出一个修正系数用以拟静力法与时程分析法结果的互相转换。本文在建立半地下贮液池实际有限元模型的基础上建立另一个简化模型,对简化模型分别进行+X、+Y、-X、-Y四个方向的动力时程分析以及拟静力分析,对比两种方法的结果,得出两种抗震分析方法计算得到的结构最大响应位置相同,由此提出一个拟静力法相对于时程分析法的修正系数1.37。在此基础上对实际有限元模型采用拟静力法计算得到结构最大响应,并由修正系数转换为时程分析法的最大响应,发挥两种方法各自的优点对结构进行抗震性能分析,为半地下贮液池的结构抗震研究提供参考。
As a special underground structure,the semi-underground liquid storage tanks may undergo various earthquake damages under the action of earthquakes.Due to the complex structure of the semi-underground liquid storage tank and the large number of finite element model elements and nodes,it is difficult to use the time history analysis method to calculate;Although the pseudo-static method is simple to calculate,it cannot obtain the maximum response of the structure under the action of dynamic seismic waves.Therefore,a correction coefficient is proposed for the conversion of the results of the pseudo-static method and the time history analysis method.In this paper,a simplified model is established based on the actual finite element model of a semi-underground liquid storage tank.Both the simplified model subjected to dynamic time history analysis and the quasi-static analysis method in four directions of+X,+Y,-X,and-Y are performed.Comparing the results of those two methods,it is concluded that the position with the maximum response is the same.Therefore,a correction factor of the pseudo-static method to the time history analysis method is 1.37.On this basis,the quasistatic method is first used to calculate the actual finite element model to obtain the maximum response of the structure,and then the correction coefficient is used to convert the maximum response of the time history analysis method.This method takes the advantage of those two seismic performance methods,and provides a reference for the seismic research of the semi-underground liquid storage tanks.
作者
毕继红
段逸辰
霍琳颖
王照耀
Bi Jihong;Duan Yichen;Huo Linying;Wang Zhaoyao(School of Civil Engineering and Architecture,Tianjin University,300350,China;Key Laboratory of Coast Civil Structure Safety(Tianjin University),Ministry of Education,300072,China)
出处
《特种结构》
2022年第1期35-42,共8页
Special Structures
基金
天津市自然科学基金资助项目(18JCYBJC90800)。
关键词
贮液池
动力时程
抗震性能分析
有限元分析
Liquid storage tank
Dynamic time history
Seismic performance analysis
Finite element analysis
