【摘要】 基于桩—土—结构动力相互作用体系振动台模型试验的数据,研究了动力相互作用体系对上部结构的影响。研究结果表明:由于动力相互作用体系的影响,上部结构频率减小,阻尼增大;在输入地震波加速度峰值较小时,桩—土体系对地震波起放大作用,输入地震波加速度峰值较大时,桩—土体系起减震作用;在地震波由振动台台面传到土体表面的过程中,桩—土体系改变了地震波的频谱成份。更多还原

【Abstract】 Through analyzing the data of shaking table test of dynamic pile-soil-structure interaction(SSI)system,the effects of SSI on superstructure are studied in this paper.Due to the effect of SSI,the natural frequency of superstructure is lower than that of the structure on fixed base and its damping ratio is larger than that of structure.When input small earthquake wave,pile-soil system makes the wave large.And if input big earthquake wave,pile-soil system will reduce the energy of the earthquake wave.When the earthquake wave transfers from the surface of shaking table to the surface of the soil,the spectral component of the earthquake wave is changed by pile-soil system.更多还原