SEISMIC RESPONSE CHARACTERISTIC OF OBSERVATION FACILITIES FOUNDED ON CALLED "HYBRID GRAVITY PLATFORM" FOR WIND-POWER GENERATION ON THE OCEAN

Abstract

 In recent years there is increasing interest and attention for the utilization of renewable energy sources in Japan. Especially, construction of facilities for wind-power generation tends to increase. In addition, attention is currently focused on construction of wind-power generation on the ocean, since construction costs and wind condition are more favorable and advantageous than the land construction. Seismic response characteristic of this structure is investigated in this study by shaking table test of the experiment model which is installed as the facilities to observe the conditions of the wind, wave, etc. The foundation type is called "hybrid gravity platform", which consists of concrete base and supporting steel pipes. Acceleration wave of which phase is random and sine wave is applied to input earthquake motion for the shaking table test. As a result, the stability of this structure against sliding and rollover is confirmed by the dynamic load.