Optimization design method for over-tracking seismic(vibration)isolation structures based on ratio of benefit to life cycle cost
Seismic(vibration)isolation technology is an effective measure to improve the seismic performance and comfort of over-tracking buildings,and the design methods optimization of such structures has practical significance and urgency.This study proposes an evaluation model based on the ratio of benefit to life cycle cost that suitable for over-tracking seismic(vibration)isolation structures.The effects of key structural parameters such as period ratio,mass ratio,stiffness and damping of the isolation layer on the benefits of the over-tracking seismic(vibration)isolation structures were studied.Based on genetic algorithms,an optimal design method for over-tracking seismic(vibration)isolation structures is proposed.The research results show that the seismic losses of the structure after adding isolation layers are mainly concentrated in the substructure,and the greater the mass ratio of the upper and lower structures,the smaller the seismic losses.The period ratio of the upper and lower structures has a greater impact on the overall seismic losses of the structure.The larger the period ratio,the smaller the seismic losses.The stiffness of the isolation layer is positively correlated with the isolation efficiency.After using the optimization algorithm to optimize the prototype structure,both seismic losses and vertical acceleration vibration levels were reduced,verifying the feasibility of this method and providing reference for engineering design.
over-tracking buildingsseismic(vibration)isolation structurelife cycle costratio of benefit and costoptimization design
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