New Development of Control Method of Shaking Table With Bi-Linear Structures

The Hanshin-Awaji earthquake disaster occurred in Kobe area of Japan in 1995. Considering the lessons learned from the disaster of this earthquake, Japanese government has decided to construct a three-dimensional Full Scale Earthquake Testing Facility. It is now being constructed under the supervision of the National Research Institute for Earth Science and Disaster Prevention (NIED). The purpose of this shaking table is to conduct fracturing tests rather than elastic vibration tests for full scale structures. In the tests, the classical operation and control procedure for shaking table such as the trial excitation cannot be effectively applied to this shaking table, because dynamic property of the test structure varies with the progress of fracturing. Therefore, the development of a new operation and control method for the shaking table is the urgent research subject. In this study, firstly, we studied dynamic interaction behaviors of the shaking table with a bi-linear test model. Secondly, to reduce the interaction from the motion of the shaking table, the Minimal Control Synthesis (MCS) algorithm was newly introduced into the conventional control (CC) system. This paper deals with the efficacy of the MCS algorithm through the simulations and experiments using the two dimensional small scale shaking table with a bi-linear model structure.