In order to more effectively protect masonry pagodas and retain their original historical style and features,Pengzhou Zhenguo White Pagoda was examined as a representative case. The isolation performance of the pagoda was analysed using different isolation schemes as parameters. The vertex maximum acceleration,interlayer displacement,and shear force values under rarely severe earthquake before and after isolation were compared,and the wind resistant and anti-overturn status after isolation were calculated. The results showed that the seismic response could be reduced under a rare earthquake by selecting larger isolation bearings and an outer edge arrangement. The maximum acceleration of the vertex was decreased by approximately 80%,while the horizontal shear was decreased by approximately 70%,which effectively improved the seismic safety of the masonry pagoda.%为了更好的保护砖石古塔,最大限度的保留古塔原有建筑和历史风貌,以彭州镇国寺白塔为实例,通过布置不同的隔震方案,分析不同方案下古塔的隔震性能,对比了罕遇地震作用下古塔隔震前后的顶点最大加速度、层间位移和剪力,并进行了隔震后古塔的抗风和抗倾覆验算.研究结果表明:古塔隔震方案宜采用选取尺寸较大的隔震支座,并将其沿隔震层外缘均匀布置;隔震后古塔在罕遇地震作用下的响应显著降低,其中顶点最大加速度下降了80%,层间剪力下降了70%,有效提高了古塔的抗震安全性.
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