Passive control for far-field earthquake oscillations of tall buildings including soil structure interaction

This paper investigates the effects of passive control system for earthquake oscillations of tall buildings including soil structure interaction (SSI) effects. Tuned Mass Dampers (TMDs) are utilized as passive controllers for the system. The system is modeled as a 40-story building with 160m height consideringthe translation and rotation of foundation. The SSI effects are considered for the 3 soil types, i.e. the soft, medium and dense soils; and their results are compared with the fixed foundation results. The Newmark method is utilized to achieve the displacement, acceleration, and drift of different stories. To illustrate theresults, 8 far-field earthquake data are applied to the model. The Ant Colony Optimization (ACO) methodis employed to obtain the best parameters for the TMD device. The design parameters are assumed as the mass, spring stiffness and damping quantity. The objective is to reduce the maximum drift of the structure. The results show that the TMDs are effective devices to reduce the oscillations of tall buildingsincluding SSI effects. In addition, it is indicated that the ACO method can be effectively applied to design the optimum TMD devices. The effects of optimized TMD parameters on the drift, displacement and acceleration of the building are also investigated in this research

Keywords:

Tall Building , Earthquake Oscillations , Tuned Mass Damper , Soil Structure Interaction , Ant Colony Optimization