MODERN CONTROL DESIGN OF SEISMICALLY EXCITED TALL BUILDINGS WITH UNCERTAIN DYNAMIC CHARACTERISTICS

In this research, an innovative numerical simulating approach for realistic time domain analysis of excessive degrees of freedom structures with uncertainty in dynamic properties have been demonstrated. A full scale finite element model of desired multi-story and multi bays of three samples structures to production of the consistent stiffness, damping and mass matrices of the models have been constructed. A state-space transformation of the actuators-structure dynamic model has been performed with appropriate dimensions of system, control and excitation influence matrices. Some easy selective control algorithm based on the Optimal-Stochastic control theories such as LQG, DLQRY and modified sliding mode control have been programmed switched with the simulation control sequences. Some realizable features of accurate control phenomena such as consideration of time delay and noises in input earthquake time histories or measurement sensors of evaluating responses were concerned in illustrative simulation models. These models can be analyzed under either various intensity of corresponding earthquakes and desired random excitations passed through the suitable filters which satisfied stochastic parameters of earthquake disturbances. This control procedure will be shown very attractive to easy access dealing with all of the severity and multi-challenges difficulty of control designs of multi objective optimal control problems. The presented results of these extensive simulation models illustrate the feasibility and applicability of the implementing the proposed stochastic optimal control designs of required active control force histories to stable and energy-saving control strategy of tall building structures.