Development of a seismic isolation floor using thin steel plates with a restoring mechanism

摘要：

　　In this paper,a seismic isolation system in a hospital operating room that allows resumption of surgery immediately after an earthquake is described.The seismic isolation floor comprises thin sliding steel plates and galvanized embossed steel plates.Constant force springs are connected to the sliding steel plate and are used to eliminate the residual displacement after an earthquake.The residual displacement can be reduced by using a restoring force of about 0.1 to 0.4 against the frictional force of the seismic isolation floor.The range of this restoring force was verified using an analysis model.We verified the performance of this seismic isolation via shaking table tests with a full-scale test specimen.In the shaking table tests,various seismic motions were used in two cases,that is,with and without eccentric load on the seismic isolation floor.We found that the response acceleration on the seismic isolation floor can be reduced to less than 200 cm/s2 for all seismic motions,and almost no residual displacement occurred owing to the action of the constant force spring.

关键词： seismic isolation floor restoring mechanism constant force spring shaking table test residual displacement

作者: K.Sugimoto A.Fukukita Y.Kitamura K.Isoda

作者单位: Institute of Technology,Shimizu Corporation Design Division,Shimizu Corporation

会议类型: 国际会议

会议名称: The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)

会议地点: 青岛

会议语种:英文

页码: 392-401

在线出版日期: 2018-07-22（万方平台首次上网日期，不代表论文的发表时间）