A StudyFor The Evaluation Method Of The Effective Input Ground Motion to The Structures accouning The Effects Of The Surrounding Soil Bahaviors

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The purpose of this report is to clarify the dynamical characteristics of the soil ground subjected to earhtquake excitation, and to evaluate quantitatively the input energy to a frame by the ground motion accounting the effects of the surrounding soils.Respones analysis of a test model by a computer-actuator on-line system and the following vibration generator tests were caaried out.1. The vibration test of a footing by the vibrator installed on the surfacs footing.2. The vibration test of a test model with the footing by the vibrator installed on the surface footing.3. The vibration test of a footing by the vibrator installed on the embedded footing.4. The vibration test of a test model with the footing by the vibrator installed on the embedded footing.The test results were compared with the theoritical results. Finally, a new method to estimate the effective input energy to a frame accounting the effects of the internal damping and the radiation damping of the ground was presented.