Seismically isolated layer may pound against moat walls when a large earthquake occurs. To address the above problem, we developed the displacement control system (DCS). DCS is a seismically isolation system with quasi-zero stiffness (QZS) and inerter. This study evaluated the steady-state response of our DCS through analysis. The response of DCS to seismic excitation was also investigated through shaking table tests. Comparing the analytical solutions and the test results showed that the analytical solutions agree well with the test results. The test results of seismic wave excitations indicate that our DCS suppresses the maximum response displacement and acceleration.
