Study On The Interaction Effects Of Equipment-structutre Considering The Effect Of The Different Equipment Positions

In recent years,with the understanding of the huge economic loss caused by the damage of equipment-structure system in the earthquake,scholars at home and abroad have carried out a series of seismic responses of ancillary equipment under earthquake.Based on the ten-story steel frame structure model,this paper focuses on the influence of the interaction of different position and equipment on the dynamic response of equipment-structure system under the action of different earthquake waves.The results are compared with the calculated results of floor response spectrum,and the necessity of dynamic analysis of the equipment-structural system is demonstrated.The main research contents and research results are as follows:(1)Based on the dynamic coupling characteristic of the equipment-structure system,the influence of equipment on the ynamic response of the equipment-structure system is affected by the position of the equipment changed in the structural layer and changed in the floor.was discussed under the action of small earthquakes,moderate earthquakes,and large earthquakes of the El Centro Wave,Taft wave and Tianjin artificial wave.Obtained that: The larger torsional response of the top floor of the structure is caused by the torsion,when the equipment is eccentric on the top layer of the structure.The torsional response makes the dynamic response of the flexible edge column of the structure significantly increased.The influence of the device eccentricity on the dynamic response of the structure is reduced and the dynamic response of the equipment is increased with the stiffness degradation of equipment.when the equipment enters the phase of nonlinear deformation.The equipment has great influence on the dynamic response of the floors nearby when the equipment is placed on different floors.(2)The elastic floor response spectrum is established and the dynamic response of the equipment is calculated based on the floor response spectrum.The equipment and main structure have entered into the non-linear reaction stage successively in the stage of small earthquakes,middle earthquakes and large earthquakes.The influence of the equipment nonlinear deformation is considered with the reduction coefficient in the calculation of the equipment dynamic response when the equipment enters the non-linear reaction.The dynamic calculation results of the equipment under the floor spectrum method and the Time-history analysis method are compared and analyzed.Obtained that: Compared with the time History analysis method,the results of the floor response spectrum are different.As the dynamic calculation of the equipment is considered the interaction between the equipment and the structure,the calculation results are more reliable.Therefore,it is necessary to carry on the dynamic analysis of the equipment-structure system under the coupling action.(3)Based on the research of single equipment-structure system,the influence of the dynamic interaction between the equipment and the main structure is further explored when multiple devices are placed on the main structure.Obtained that: The dynamic interaction between the equipments can reduce the dynamic response of the structure and equipment when multiple devices are placed on the structure floor.The stiffness of the connecting point of the equipment and the structure,the stiffness of the equipment and the main structure,the distance between the equipment and the floor position of the equipment are the important factors that affect the power interaction of the equipment.