考虑SSI效应的TMD减震特性振动台模型试验

设计并完成了考虑土与结构相互作用的 TMD减震控制振动台模型试验。通过试验 ,分析了刚性地基和柔性地基上 TMD对主体结构的减震效应 ,探讨了 SSI效应对结构减震控制的影响。在此基础上 ,将柔性地基上结构— TMD体系中主体结构地震反应看作是 SSI效应、TMD减震效应以及 SSI和 TMD的耦合效应三部分共同作用结果 ,分析了不同工况下三种效应对主体结构地震反应的影响大小。试验结果表明 :SSI效应对 TMD的减震性能有很大影响 ,这使得基于刚性地基假设设计的 TMD系统在柔性地基上的减震效果不理想 ,甚至在某些时候可能产生负面效果。对刚性地基和柔性地基上影响 TMD减震性能的一些因素进行了探讨。

Shaking table model testing of TMD shock absorbing characteristics considering soil-structural interaction effects

Shaking table model tests of TMD suppressing vibration control considering soil structural interaction(SSI) effects are designed and carried out. The TMD cushioning effects on the main structure on the rigid base and soft soil are analyzed through these tests and effects of SSI on structure are discussed. It is point out that the earthquake response of the main structure of structure TMD system on soft soil is regarded as the results of common action of SSI effect, TMD cushioning effect and the coupling effect of SSI and TMD. The effects of three factors on the earthquake response of the main structure are analyzed under different load working conditions. The results dedicate that SSI have great effects on the performance of TMD. So, the suppressing vibration control effects of TMD designed on the condition of rigid base are not satisfied in soft soil condition. Some facts relative to TMD cushioning effect on the rigid base and soft soil are discussed.