通过利用计算机模拟地震对砖塔砌体的影响得到古建砌体结构抗震特点。建立砖塔砌体结构力学分析模型，对结构分别施加特定的人工波和天然波，进行时程分析和模态分析，得到X、Y 方向层间位移图，层间剪力图以及弯矩图。结果表明，在人工波作用下，结构第3层和第4层的层间剪力比天然波作用下的层间剪力大30％左右，第2层和第3层的弯矩比第2种地震波作用下的弯矩大20％左右；在2种特征周期的地震波作用下，最大层间位移都集中体现在第6层，其层间位移是第1层的2倍多，塔在天然波作用下将会发生损坏。%A brick masonry model was developed in this study.The specific artificial wave and the natural wave to the structure were applied to perform the time history analysis and modal analysis.In addition,layer displacement map layer between the X di-rection,Y direction between the displacement map layer,inter laminar shear diagram and bending moment diagram were ob-tained.It was found that under the influence of the artificial wave,the shear of the structure between the third floor and the fourth were about 30% larger than that of the natural wave.The bending moment diagram of the second layer and the third were about 20% larger than that of the natural wave.Under the impact of seismic waves in two characteristic periods,namely the maximum story displacements and the two times of the first layer's,was mainly embodied in the sixth layer.The structure might sustain collapse under the action of natural wave,which provide a theoretical basis for the study on the seismic performance of brick masonry structures and the reinforcement and remedy for weak layers.
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