【摘要】 为更好地保护土遗址,用FLAC3D软件对苏巴什佛寺东寺佛塔进行了地震响应分析,包括佛塔位移、应力以及地震波的加速度放大系数和傅立叶谱.结果表明:在地震荷载作用下,该佛塔产生了一定永久位移,佛塔内部产生了拉应力集中;地面以下地震加速度存在弱化现象,地面以上地震加速度存在放大现象,地震加速度放大系数随距地表高度的增大而增大,佛塔顶端达2.5;地基土体对高频波具有滤波作用,佛塔顶端低频波存在放大现象,对高频波也有滤波作用.更多还原

【Abstract】 To better protect earthen heritage sites,software FLAC3D was used to analyze the seismic response of the east temple pagoda of the Subashi Temple,and the seismic-induced displacement and stresses of the pagoda and the acceleration amplification factor and Fourier spectra of seismic waves were investigated.The results show that the pagoda produces a permanent displacement and has a tensile stress concentration under seismic loads.The seismic acceleration is weaken below the ground but amplified above the ground.The amplification factor of seismic acceleration raises with the increase of height away from the ground surface and reaches to 2.5 at the top of the pagoda.Both foundation soil and the pagoda top have a filter function to high-frequency waves,and low-frequency waves are amplified at the top of the pagoda.更多还原