Proposition of Isolation Table Considering the Long-Period Earthquake Ground Motion (Method of Changing Natural Frequency of Isolation System with Additional Spring)
Proposition of Isolation Table Considering the Long-Period Earthquake Ground Motion (Method of Changing Natural Frequency of Isolation System with Additional Spring)
复制标题
考虑长周期地震地震动的隔震表的提出（附加弹簧改变隔震系统固有频率的方法）
DOI：
10.1007/978-3-030-48153-7_32
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Masami Matsubara
中科院分区：
文献类型：
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作者：
Shozo Kawamura;Tetsuhiko Owa;Tomohiko Ise;Masami Matsubara
长周期地震动包括一些接近于典型隔震系统的固有频率的周期分量。因此，当长周期地震动作用于隔震系统时，存在由于共振而使隔震系统的响应显著增大的问题。在本研究中，我们提出一种新的被动隔震系统，考虑长周期地震动。在该隔震系统中，当地震动周期由短周期变为长周期时，在共振条件下，附加弹簧将与隔震台连接。这样隔振系统的固有频率就变高了，从而可以避免共振条件。通过数值仿真验证了该隔震系统的有效性，并通过试验验证了该隔震系统的适用性。结果表明，加速度响应和位移响应都大大降低。因此，很明显，这种隔离系统可以抑制共振，即使在长周期的地面运动。
The long-period ground motion includes some periodic components that are close to the natural frequency of a typical isolation system. Therefore, there is a problem that the response of the isolation system increases significantly because of resonance when the long-period ground motion acts onto the system. In this study, we propose a new type passive isolation system considering the long-period ground motion. In this isolation system, an additional spring will be connected with the isolation table at the resonance condition when the period of the ground motion shifts from a short-period to a long-period. Then the natural frequency of the isolation system becomes higher so that the resonance condition can be avoided. The validity of the proposed isolation system is confirmed by numerical simulation, and then the applicability is verified by experiments. The results show that the acceleration response and the displacement response are greatly reduced. Thus, it became clear that this isolation system can suppress the resonance even when the long-period ground motion is present.
DOI：
10.1299/kikaic.51.2768
发表时间：
1985
期刊：
Transactions of the Japan Society of Mechanical Engineers. C
影响因子：
--
作者：
T. Fujita;Sadayuki Kuramoto;T. Omi
通讯作者：
T. Omi
DOI：
10.1299/transjsme.14-00607
发表时间：
2015
期刊：
The journal of physical chemistry. B
影响因子：
--
作者：
T. Matsuoka;T. Takayanagi;Tomonori Niwa;K. Ohmata
通讯作者：
K. Ohmata