Recently, there have been a lot of earthquakes in Japan. It is necessary to promote seismic isolation devices for buildings. The devices have been hardly diffused in attached houses, because the devices are very expensive. We should develop a low-cost seismic isolation device for detached houses. We suggested a new seismic isolation device which uses a two-layer circular tube as a unit. If hyst...

endurance time (et) method is a relatively new performance-based earthquake method for structural evaluation and design. in this method, the structure is subjected to a gradually intensifying accelorogram(s) and its performance is assessed based on the maximum time duration that it can meet the specified performance objectives. using moment-resisting and braced frames which are rehabilitated by...

The limits of the conventional fixed-base seismic design of structures are stressed, together with the capability of the modern seismic vibration passive control (SVPC) techniques to overcome such limits, for both new and existing constructions. The main features of such techniques (seismic isolation, energy dissipation and those using shock transmitters and shape memory alloys) are summarized....

This research reveals the efficiency of seismic isolation system in the form of rubber-metal supports with different height buildings at multi component seismic impact. As an example, seismically insulated monolithic reinforced concrete 5, 9 and 16 story buildings are considered. The solution of the problem is obtained by a direct integration of the motion equations for an explicit scheme in fi...

This study is devoted towards evaluating seismic performance of a three-span continuous highway bridge subjected to moderate to strong earthquake ground motions in its longitudinal direction. In this regard, nonlinear dynamic analysis of the bridge based on the direct time integration approach using the 4 order Runge-Kutta method is conducted. Two types of isolation bearings are used in the ana...

This paper reports on an investigation into how base isolation can produce benefits for the architectural design of hospitals. If a relatively new technology such as base isolation can be coupled with interdisciplinary collaboration from the birth of a project, it seems possible to achieve an improvement not only in their seismic, but also in their architectural design. The methodology adopted ...