采用隔震支座的料仓-框架结构的动力响应分析

Dynamic Response Analysis of a Silo-frame Structure with Isolation Bearings

为减缓地震作用下的料仓-框架结构的损害,结合某石化公司脱气及储存料仓-框架结构项目,利用ANSYS软件分别建立单料仓-框架结构及隔震处理结构的有限元模型,分析空仓和满仓两种工况下原结构及隔震处理结构在地震作用下的动力响应。建立料仓-框架隔震结构模型,利用振型分解反应谱法、时程分析方法分析得出在不同工况下结构的应力、位移、应变等数据。通过数据分析说明采用隔振支座能显著提高结构抗震能力,且时程分析比振型分解反应谱法分析的更加精确。

The silo-frame structure is characterized by high center of gravity,high loading,poor overall stability and local stability,which is easily damaged under earthquake.In order to mitigate the damage of the silo-frame structure under earthquake,based on the project of degasification and storage silo-frame structure of a petrochemical company,ANSYS software was used to establish the finite element models of single silo-frame structure and seismic isolation structure respectively,and the dynamic response of the original structure and seismic isolation structure was analyzed under two working conditions of empty and full silo.The data of stress,displacement and strain of the silo-frame isolated structure model under different working conditions were analyzed by using the vibration decomposition reaction spectrum method and time course analysis method.The data analysis shows that the use of vibration isolation bearings can significantly improve the seismic capacity of the structure and the time course analysis is more accurate than the vibro-decomposition reaction spectrum method.A few suggestions has been put forward for the design of future silo-frame structures.