考虑土与结构相互作用效应的结构减震控制大型振动台模型试验研究

本文设计并完成了考虑土与结构相互作用的结构减震控制大型振动台模型试验。通过对四种结构形式的对比试验，探讨了土与结构相互作用（ＳＳＩ）效应对结构地震反应的影响以及调谐质量阻尼器（ＴＭＤ）在刚性和柔性地基条件下对主体结构的减震效应。通过比较同一地震动作用下主体结构在刚性和柔性两种地基条件下的地震反应，可知：ＳＳＩ效应具有降低和提高结构减震控制效果的双重作用，其综合效果与输入地震动的频谱特性、加速度峰值大小有关。由于ＳＳＩ效应在结构地震反应中发挥着双重的作用，因而使得基于刚性地基假定下设计的ＴＭＤ减震控制系统在柔性地基条件下的控制效果不太理想，甚至会出现负面效应。本文还探讨了在柔性地基条件下影响结构减震控制效果的一些因素。

Shaking table model testing of structure suppressing vibration control including soil-structure interaction effects

In this paper, shaking table model tests of structure suppressing vibration control including the soil-structure interaction(SSl) effects are designed and carried out. By the testing of four model structures on the rigid base and soft soil, the effects of soil-structure interaction on both the earthquake response of structure and the efficiency of suppressing vibration control for the top of super structure simulating tuned mass damping(TMD) are analyzed and discussed. Comparing the earthquake response of the main structure which is in the condition of different bases and the same earthquake ground motion input, the results of the tests show that SSI effect has the double action of reducting and incresing the efficiency of structure suppressing vibration control, its comprehensive effect is related to the frequency spectrum characteristics and peak acceleration value of input seismic waves. Because of the double action of SSI effect, the suppressing vibration control effects by TMD designed based on the condition of rigid base are not satisfactory in.soft soil condition. Some factors affecting the efficiency of suppressing vibration control under the condition of soft soil ground are also discussed.