【摘要】 依据四川省汶川地震中损伤的砖石古塔统计资料,结合现场考证和资料分析,探讨了古塔震害程度与地震烈度的对应关系。研究表明,砖石古塔因结构高大、材料老化,对地震作用较为敏感;在地震烈度Ⅵ度区域,52%以上的古塔出现局部损坏,在地震烈度Ⅸ度及以上区域,75%以上的古塔完全毁坏;按照中国现行抗震设防标准,在设防烈度Ⅵ度至Ⅸ度的范围内建立砖石古塔震害程度与地震烈度的表述关系是合适的。论文针对古塔的结构特征、地震损伤状况以及文物修复的要求,提出了古塔震害的分级定义,确定了砖石古塔震害程度与地震烈度对应的参考指标。更多还原

【Abstract】 This study discusses the corresponding relation between seismic intensity and damage degree of ancient masonry pagodas based on the statistic data from damaged pagodas in Sichuan Province during Wenchuan earthquake.Combining data analysis with field survey,the study indicates that:(1) Masonry pagodas are hypersensitive to seismic action because of the material aging and tall structure of the pagodas.(2) More than 52 percent of pagodas are damaged at local break degree in the area witn seismic intensity Ⅵ,and more than 75 percent of pagodas are destroyed in the area with seismic intensity equal to or over Ⅸ.(3) It is appropriate to establish the relation between the seismic intensity and damage degree of pagodas within the range of seismic intensity Ⅵ to Ⅸ according to the seismic fortification criterion of China.A definition of seismic damage classification that reflects the structural characters,damage conditions and repair requirement of the pagodas is proposed,and the referential criterion of damage degree of pagodas corresponding to seismic intensity is suggested.更多还原