砖石古塔结构振动台试验模型设计与试验验证

Design and experimental verification of shaking table test model of brick masonry structure in ancient pagoda

为了得到小雁塔的动力特性,考虑结构特点与试验条件,对小雁塔砖石结构进行了振动台试验模型设计。基于结构动力相似基本方程,运用一致相似率和单参数畸变相似理论,对灰砖与砂浆进行了相似设计;采用欠人工质量模型,对配重进行设计,并对地震波的选取与调整进行了分析;对试验模型制作过程中某些细节的简化进行了阐述。通过对试验现象与前3阶动力特征值的对比分析,结果表明,采用所选的振动台试验模型,能够反映小雁塔结构的动力特性,也验证了试验模型的合理性。

In order to measure the dynamic characteristics of the Small Wild Goose Pagoda,a shaking table test model of the brick masonry structure is designed considering the structure characteristics and the experimental conditions.Based on the basic equation of structural dynamic similarity,the similarity design of grey brick and mortar is carried out by using the theory of uniform similarity and single parameter distortion similarity.The additional weight is designed by using the artificial mass model,and the selection and adjustment of seismic wave are analyzed.Finally,the simplification of some details is expounded.Through comparing the test failure and dynamic eigenvalues of the first three order modes,the test results show that the shaking table test model in this paper can reflect the dynamic characteristics of the structure and verify the rationality of the experimental model.