Abstract
Based on the local T-S model, the switching control method for the nonlinear response of the seismic surface is studied, and the stiffness matrix of the composite interlayer element of viscoelastic damper and herringbone support is derived. The high-order single step ß method is applied to the nonlinear seismic response analysis and the instantaneous optimal active switching control. The local T-S model and controller are designed, and the approach and control of global nonlinear responses are realized through the multi-model switching control. The results show that the proposed method can accurately reflect the reduction of seismic ground load and the switching control of the main structure when the viscoelastic damper is installed. The switching control effect of the maximum spatial displacement becomes more and more obvious with the change of time history, and the control effect of all layers applying the switching control force is the most significant. Whether the controller is disturbed or not, it is always good and stable performance.
Highlights
A large number of earthquake damage and existing records show that the earthquake will cause indelible damage to people’s lives and property
Stiffness matrix and switching control force vector of interlayer element If the time interval is t, t = i t, according to the layer model, only one direction (x-direction) of vibration is analyzed at a time, it means the relative displacement of viscoelastic damper nodes along the X direction, :
The results show that this method can accurately reflect the seismic response of the structure with a viscoelastic damper, and it is a more practical and accurate calculation method
Summary
A large number of earthquake damage and existing records show that the earthquake will cause indelible damage to people’s lives and property. In order to reduce the seismic response of the building structure, in addition to studying the seismic design structure of the bearing system of the building structure itself (Zhang et al, 2017), some energy dissipation devices are set on the structure to increase the structural damping and consume the seismic energy through the nonlinear deformation of the energy dissipation materials, so as to reduce the seismic response of the main structure and effectively suppress the structural vibration (Zhang et al, 2016). Multi-model switching control of nonlinear response based on the local T-S model is proposed. The switching control of the seismic surface response is realized
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