【摘要】 动力特性是结构自身的重要特征之一,是评价古塔抗震性能和损伤状态的重要指标。采用敲击激振法对某砖石古塔的动力特性进行了测试,根据测试所得各测点的加速度时程和自功率谱函数图,分析了结构的自振频率和阻尼及结构振型,并用有限元软件ANSYS对测试结果进行了进一步验证。测试和分析结果可为同类古塔的维护和开发提供理论依据。更多还原

【Abstract】 The dynamic behavior is the important character to evaluate the seismic property and damage of ancient towers.This paper discusses the test method for applied hammering excitation technology to determine the dynamic behavior of the ancient masonry tower.The structural natural frequencies,mode shapes and damping ratio are analyzed according to acceleration time history and power spectrum curves of the ancient tower.The test scheme is verified by the results of finite element code ANSYS.It is believed that the results of test and analysis can provide a theory reference for the maintenance and development of similar ancient masonry tower.更多还原