Basic Study on Development of Response Controlled System with Uplift Mechanism

为了在更大范围内利用由于隆起而产生的地震减力效应，本研究对三种类型的响应控制系统进行了研究。这些系统是(1)允许在中层上扬的系统，(2)允许在柱/支撑跨度小于宽度的情况下上扬的系统，以及(3)多跨的系统。对于式(1)和式(2)，采用均匀剪力梁模型进行了解析研究，阐明了其振动特性和动力行为。然后进行了振动台试验，研究了隆升运动的地震反应和减振效果。对于(3)，提出了一种自定心结构体系，并通过应用实例进行了地震反应分析。结果表明，这些系统具有明显的高模态振动和隆升减振效应。

To utilize the seismic-force reduction effect due to uplift to a wider range of buildings, three types of response controlled systems are investigated in this study. Those systems are(1) Systems allowed to uplift at mid-story,(2) Systems allowed to uplift with narrower span of column/support than the width, and(3) Systems with multi spans. For(1) and(2), analytical study is done using uniform shear-beam model to clarify those vibration characteristics and dynamic behaviors. Then shaking table tests are conducted to investigate the seismic responses and reduction effect by uplift motion. For(3), a self-centering structural system is proposed and seismic response analysis is carried out to investigate the multi-dimensional responses using an application example. The results show the distinctive higher-mode vibration and reduction effect due to uplift in those systems.