To check performance of the Hachinohe government offices, in use at the time of the Great East Japan Earthquake of 2011, observation data was analyzed in this study. Numerical simulations using Modified Bi-Linear Modeling were created of the building, which took into consideration the degradation of the secondary stiffness and yielding shear force.
From the results of this analysis, it was proved that the base isolation system has non-linear behavior and the upper-structure behaves in the elastic range. This is because base isolation decouples movement from ground motion, the displacement concentrates at the isolation level and the upper-structure behaves as a rigid body.
A comparison of isolated and non-isolated building responses was performed in this study, and a design procedure for base isolated buildings in Turkmenistan is proposed. This procedure is based on the recommendations of the CIB (International Council for Research and Innovation in Building and Construction), using the preliminary design procedure for seismically isolated buildings (CW2012) and taking into consideration the Building Seismic code of Turkmenistan.