Seismic Response Analysis Of Underground Substation Main Factory Building Structure

In order to meet the rapid growth of urban power and relieve the tense contradiction of urban land as the development of large-scaled urban construction,the number of underground substations are increasing and their structures are more complex.Once the damage of them,they would bring huge economic losses to the society as the city power supply system of electricity and changing the voltage of the hub.There is a very important significance to research the seismic response of underground substation main factory building structure.In order to get some meaningful conclusions,for similar underground substation main factory building structure seismic design provide some beneficial reference and advice,this paper based on the underground substation main factory building structure as the research object,considered the dynamic interaction of the soil-the main factory building structure-the electrical equipment,analyzed of the action of earthquake response.This paper mainly completed the following several aspects:(1)Infinite element artificial boundary is used to consider the soil’s half limitless,using finite element analysis software ABAQUS to establish the underground substation electrical equipment three-dimensional calculation model,which is considered the interaction of the soil-the main factory building structure-the electrical equipment,selecting El Centro wave,lan zhou wave and Taft wave which is suitable for Ⅱ site conditions,this paper analyzed the more severe level earthquake,the basic level earthquake and the rarely met level earthquake time history of the underground substation main factory building structure.Analyzed the acceleration amplification coefficient,interlayer displacement angle,stress amplitude under the action of static and seismic load response,the internal force,find out the weak links of the structure,and coefficient,interlayer displacement angle,stress amplitude under the action of static and seismic load response,the internal force,find out the weak links of the structure,and puts forward some proposals to the seismic design of such structures.(2)Respectively to change vibration input,soil properties and structure depth and other factors,through the contrast analysis of the structure acceleration amplification coefficient,interlayer displacement angle,stress amplitude and side wall internal force parameters.investigated the influence of seismic response of main factroy building structure of underground substation,soil layer characteristic and structure buried depth,which can give some suggestions for the seismic design of underground substation.(3)Established the model which is not considering the interaction of the main factory building-electrical equipment and compared with the model which is considering the interaction of the main factory building-electrical equipment,analyzed the influence of electrical equipment on the seismic responses of the underground substation main building structures,the result showed that: Under the action of more severe level earthquake,the maximum storey displacement angle and lateral wall shear force and bending moment difference of the models which is considerd the interaction and the models which is not considerd the interaction are small,At this time,the seismic design of underground substation can be carried out with the equivalent load method without considering the electrical equipment structure interaction;Under the rare earthquake,the earthquake response of which considering the electrical equipment structure electrical equipment-structure interaction effects is large than the earthquake response of which without considering the electrical equipment-structure interaction effects.At this time,in underground substation structure seismic design should to fully consider the influence of electrical equipment to the seismic response of the structure.