Abstract
The purpose of this study is to reduce the response at appropriate timing by applying the control force only when the absolute acceleration of the upper building and the relative displacement of the base isolation layer are satisfied, considering the effect of the building on the ground motion, and to further reduce the total energy consumption.
The acceleration response spectrum is taken from the acceleration data sent to the building. In this study, the area is calculated from the acceleration response spectrum under a predetermined condition. The control force is changed by reflecting the necessary parameters in the LQR method calculated in advance from the area.
A semi-active model that uses two input waves reduces the absolute acceleration of the upper building or the relative displacement of the seismic isolation layer in some time compared with the passive model, according to the variables calculated from the acceleration response spectrum.
The largest variable calculated in the Semi-active model is compared with the Full-active model by the constant control gain calculated by increasing the LQR parameter, and the same variable gives the same control force and reduces the same response at the calculated time. Furthermore, the reduction amount of the control force was greatly reduced by comparing the RMS value of the control force with the RMS value of each response.
Compared with the Passive model, the Semi-active model showed that the desired response can be reduced only for intended time. Furthermore, it was shown that there is almost no difference in the response reduction effect even when compared with the Full-active model in which the control force is continuously applied at the maximum control gain obtained with the Semi-active model. The RMS value also showed that the energy consumption was reduced relative to the response reduction amount.
