Shaking Table Study of the Three-Dimensional Isolation of a Cylindrical Reticulated Shell

A set of shaking table tests were conducted to investigate the dynamic response characteristics of a single-layer cylindrical reticulated shell (SLCRS) with three-dimensional column-top seismic isolation. The influence of infilled wall on the seismic and isolation performance of the structure was investigated. The dynamic response characteristics of structures with and without seismic isolation were compared to investigate the effects of seismic isolation. The dynamic responses of lower-frame models with and without an infilled wall were also compared to investigate the effects of the infilled wall on the seismic isolation. Results show that the three-dimensional column-top seismic isolation improved the seismic safety of infilled wall. At the same time, the three-dimensional column-top isolation bearing can significantly reduce the acceleration and stress of the structure. The excellent isolation performance of the three-dimensional isolation bearing promises outstanding application prospects for this isolation bearing in highly seismic areas. In addition, under a small earthquake, the acceleration of the second floor with the isolation bearing was unfavorably magnified. Therefore, the seismic performance of the acceleration-sensitive nonstructural components should be improved when the three-dimensional column-top seismic isolation is applied in the areas of low seismicity. The test data and conclusions obtained in the present study can provide theoretical and technical support for the actual engineering application of such three-dimensional seismic isolation bearings.