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Optimization research on the high-performance 3-dimensional base isolation system using a velocity reduction mechanism

采用减速机构的高性能三维基础隔震系统优化研究

基本信息

批准号：
15560203
负责人：
ITO Tomohiro
金额：
$ 2.37万
依托单位：
Osaka prefecture university
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

The purpose of this study is to develop a new 3-dimensional base isolation system using a velocity reduction mechanism and to establish a fundamental technologies for actual application.In 2003, the effects of the friction damper for response displacement and response acceleration, the effects of the connecting shaft for rocking suppression are studied numerically. From these results, the horizontal, vertical isolation capability are confirmed. And the isolation capability for the horizontal and vertical simultaneous excitation is also confirmed.In 2004, the isolation capabilities for the various seismic waves with different frequency components such as Hyogoken Nambu Earthquake and Shiigata Chuetu Earthquake are evaluated numerically. It is considered that for the base isolation systems using sliding pads, the horizontal response will coupled with the vertical response, because the horizontal friction force will change according to the vertical response acceleration. Thus, numerical s … More imulations are performed for the seismic input waves with various phase differences and amplitudes, and the effects of the friction force change on the isolation characteristics are clarified. Moreover, a 1/4 scale model is fabricated and the seismic excitation tests are performed using a vertical shaking table. In the previous tests, the disadvantages of the worm gear system are found. Then, the other velocity reduction system is established using a spiral springs. Using this new system, the vertical isolation capability is also confirmed experimentally.In 2005, the test apparatus is modified furthermore and the horizontal isolation capability and the horizontal/vertical isolation capability are confirmed. In this tests, the excitation frequency, excitation amplitude and the mass eccentricity are varied. And in the numerical simulations, the response of the human living in the isolated houses is also evaluated.From these studies, the fundamental data are obtained for the optimization of the newly developed 3-dimensional base isolation system. Less

本研究的目的是开发一种采用减速机构的新型三维基础隔震系统，并建立实际应用的基础技术。2003年，对摩擦阻尼器对响应位移和响应加速度的影响、连接轴对摇摆抑制的影响进行了数值研究。从这些结果可以确认水平、垂直隔离能力。 2004年，对兵库县南部地震、椎泻中土地震等不同频率成分的地震波的隔震能力进行了数值评价。认为对于使用滑动垫的基础隔震系统，水平响应将与竖向响应耦合，因为水平摩擦力将根据竖向响应加速度而变化。因此，对不同相位差和振幅的地震输入波进行数值模拟，明确了摩擦力变化对隔震特性的影响。此外，制作了1/4比例的模型，并使用垂直振动台进行了地震激励试验。在之前的测试中，发现了蜗轮系统的缺点。然后，使用螺旋弹簧建立另一个减速系统。利用这个新系统，还通过实验证实了垂直隔离能力。2005年，对测试装置进行了进一步修改，证实了水平隔离能力和水平/垂直隔离能力。在该测试中，激励频率、激励幅度和质量偏心率是变化的。并且在数值模拟中，还评估了居住在隔离房屋中的人的反应。通过这些研究，为新开发的3维基础隔离系统的优化获得了基础数据。较少的