Development of Shaking Table Techniques Using Segmentation Concept toward More Generalized Dynamic Loading Test

动载试验对于地震工程的进步具有重要意义。由于成本高等原因，动态加载系统的尺寸通常受到限制。然而，随着用于减轻地震灾害的各种阻尼装置的发展，对动态负载测试的需求也随之增加。这项研究开发了通过添加连接到振动台的额外部分来增加振动台的功率（即位移、速度和频率容量）的方法。位移增强段是通过线性滚柱滑块和镇流器的组合开发的，而频率增强段是通过两个弹簧质量系统之间的连续碰撞而开发的。为了确保该段的准确响应，开发了各种控制算法。针对安装在基地隔离医疗设施中的医疗器械的行为，检查所提出系统的有效性。

Dynamic loading test is useful for the advancement of earthquake engineering. Due to high cost among others, dynamic loading systems are commonly limited in size. Needs for dynamic loading test, however, increases in conjunction with the development of various damping devices used for mitigation of earthquake disasters. This study develops methods that increase the power, i.e., the displacement, velocity, and frequency capacities, of shaking tables, by the addition of extra segments that are connected to the shaking table. A displacement enhancing segment is developed by a combination of linear roller sliders and ballast, while a frequency enhancing segment is developed by the production of continuous collision between two spring-mass systems. To ensure accurate response on the segment, various control algorithms are developed. Effectiveness of the proposed system is examined for the behavior of medical appliances installed in a base-isolated medical facility.