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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。
Through the use of computer simulation of the impact of earthquake on brick masonry, the anti-seismic characteristics of ancient building masonry structure are obtained. The mechanical analysis model of brick masonry structure is established, and the specific artificial wave and natural wave are respectively applied to the structure. The time-history analysis and modal analysis are carried out to obtain the displacement maps in the X and Y directions, the inter-story shear force and the moment diagram. The results show that under the action of artificial wave, the interlaminar shear force in the third and fourth layers of the structure is 30% greater than the interlaminar shear force in the natural wave, and the bending moment in the second and third layers is higher than that in the second Under the action of seismic waves of two kinds of characteristic cycles, the maximum interlaminar displacement is concentrated in the sixth floor, and the interlaminar displacement is more than twice as much as that of the first floor. In the natural Wave damage will occur.