【摘要】 利用土-结构动力相互作用中的地基隔震效应,提出换填地基进行结构隔震的新途径。依据成层地基中的单桩水平阻抗函数研究了土层动力特性对桩基阻抗的影响,指出在较坚硬场地上,只对桩身一定范围内的地基进行软化换填时,就可明显减弱桩基阻抗作用,降低其传递给上部结构的地震作用,从而达到上部结构隔震的效果。算例表明这一隔震途径的可行性和合理性。更多还原

【Abstract】 Based on dynamic soil-structure interaction,a new structure isolation approach with soil-exchanging was presented through considering the isolation effect of soil in dynamic soil-structure interaction.The influence of the soil dynamic characteristics on the impedance of single pile was discussed according to the dynamic impedance of single pile in layered soil.Through soft soil-exchanging close to pile,the dynamic impedance of pile can be weakened obviously in hard site,and the earthquake action to superstructure can be weakened too,the isolation effect is obtained.The numerical example proves that the structure isolation approach is rational and feasible.更多还原