Development of a Simple Seismic Isolation Table and Its Application to an Earthquake-Proof Device for a House

首先，研制了一种由四对半圆弧弹簧和磁阻尼器组成的新型隔震试验台。该隔震台结构简单，在各个水平方向具有相同的刚度和阻尼值。计算了隔震台在两种地震波作用下的反应谱，证实了隔震台在较宽的台面质量范围内具有隔振效果。制作了试验隔震表，并从理论和实验上对其抗力特性进行了讨论。利用电液式振动台对3层塔式结构隔震台进行了地震反应测试。并将试验结果与计算结果进行了比较，验证了工作台的隔振效果。研制了一种新型齿条齿轮磁阻尼器。该阻尼器冲程长，适用于地震i-…。多用于机器或隔震台的隔震装置，安装在建筑物的高层上。制作了试验阻尼器，并通过试验和数值模拟验证了阻尼器对机械隔震系统的减振效果。其次，在假定隔震台采用半圆弧形弹簧和磁阻尼器作为房屋动力吸振器的前提下，计算了3层木结构房屋的地震反应。通过改变减振器的阻尼比和频率比进行了计算，并考察了减振器的减振效果。制作了试制的动力吸振器和3层房屋模型，并利用振动台对房屋模型进行了地震反应和频率反应的测试。计算结果和试验结果表明，动力吸振器对3层房屋模型具有一定的减振效果。较少

First, a new type of seismic isolation table using four pairs of semicircular arc springs and a magnetic damper was developed. The isolation table is simple in construction and has the same stiffness and damping in every horizontal directions. The response spectra of the isolation table for two kinds of earthquake waves were calculated, and it was confirmed that the table has the effects of vibration isolation in a wide range of the table mass. The trial isolation table was made and its resisting force characteristics were discussed theoretically and experimentally. The seismic responses of the isolation table having 3-story tower-like structure on board were measured using an electrohydraulic type vibration machine. The experimental results were compared with the calculated results, and the effects of vibration isolation of the table were substantiated.A new type of magnetic damper using racks and pinions was also developed. The damper has a long stroke and is suitable for a seismic i … More solation device for a machine or a seismic isolation table, which are installed on a high story in a building. The trial damper was made, and the effects of vibration suppression of the damper for a machine-isolation system were confirmed experimantally and numerically.Next, the seismic responses of a 3-story wooden house were calculated on the supposition that the isolation table using semicircular arc springs and a magnetic damper was used as a dynamic vibration absorber for the house. The calculations were carried out by changing the damping and frequency ratios of the absorber, and the effects of vibration suppression of the absorber were examined. The trial dynamic vibration absorber and a 3-story house model were made, and the seismic and frequency responses of the house model were measured using the vibration machine. The calculated results as well as the experimental results showed that the dynamic vibration absorber has an effect on the vibration suppression of the 3-story house model. Less