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

本报告的目的是阐明地震作用下土壤地基的动力特性，并通过考虑周围土体影响的地面运动来定量评估输入到框架的能量。通过安装在地面基础上的振动器对基础进行振动试验。通过安装在地面基础上的振动器对带基础的试验模型进行振动试验。通过安装在埋设基础上的振动器对基础进行振动测试。通过安装在埋置基础上的振子，对有基础的试验模型进行了振动试验，并将试验结果与理论结果进行了比较。最后，提出了一种考虑地基内阻尼和辐射阻尼影响的计算框架有效输入能量的新方法。

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.