REAL-TIME AND PSEUDO DYNAMIC HYBRID EXPERIMENTS ON ISOLATION BEARINGS IN LOW-TEMPERATURE ENVIROMENTS

Abstract

 The effects of low temperature environments on the historical properties of seismic isolation bearings were investigated for the HDR-S and SPR-S bearings using real-time / pseudo hybrid experiments. The results are discussed in terms of the effects of temperature setting on initial loading, loading rate, and equivalent stiffness/damping. The effect on initial loading was independent of the temperature setting, while the effect on loading rate tended to differ between the HDR-S and SPR-S bearings. The increase in equivalent shear stiffness with increasing internal temperature in the SPR-S bearing showed a different trend from that in previous studies. The effect of temperature setting on equivalent damping is relatively small.