Abstract
Shaking table tests for the comparison of dynamic soil-structure interaction (SSI) systems were conducted, to investigate the seismic behavior and the isolation effectiveness of a high-rise isolated structure founded on various soil foundations. A laminar shear soil container was designed to minimize the boundary effects. The high-rise isolated structure was modeled as a five-story steel frame with aspect ratio of 4, founded on rigid foundation, homogeneous soft soil foundation and layered liquefiable foundation, respectively. Test results indicate that the natural frequency of the SSI isolated structure system is less than that of the system when SSI is not taken into account. The damping ratio of the isolated structure on homogeneous soft soil foundation is larger than that on rigid foundation, while it is smaller than that on liquefiable foundation. It is also shown that the isolation displacement may increase obviously when founded on soft soil, while decreases evidently when founded on liquefiable foundation. The study concludes that, even founded on soft soil or liquefiable foundation, the isolation effectiveness of the high-rise isolated structure can be warranted.
| Original language | English |
|---|---|
| Pages (from-to) | 128-133+151 |
| Journal | Zhendong yu Chongji/Journal of Vibration and Shock |
| Volume | 32 |
| Issue number | 16 |
| State | Published - 28 Aug 2013 |
Keywords
- Base isolation
- Dynamic characteristics
- Seismic response
- Shaking table test
- Soil-structure interaction