【摘要】 周期结构具有带隙特性,位于带隙频率范围内的振动或波动无法在结构中传播。该文针对土体存在覆层的情况,设计了周期部分埋入式Rayleigh表面波屏障,讨论了不同覆层厚度、波屏障不同埋入深度对带隙的影响,并对El Centro地震波进行了频域响应分析。结果表明,部分埋入工字型截面板式波屏障对El Centro地震波有较好的隔震效果。更多还原

【Abstract】 A periodic structure has band-gap characteristics so that the vibrations or waves in the band-gap frequency range cannot propagate in the structure. A partially embedded periodic barrier for Rayleigh surface waves is designed for soil with a covered layer. The influences of the covered layer thickness and the embedded depth of the barrier on the band gaps are discussed. The frequency responses to the El Centro seismic waves are analyzed. The results show that the partially embedded Rayleigh surface wave barrier with I-shaped cross section exhibits good performance on the isolation of the El Centro seismic surface waves.更多还原