建筑结构振动检测中的动态测量法  

Dynamic Measurement Method in Building Structure Vibration Detection

作　　者：陆路[1] 王鹏[2] 雍洪宝 

机构地区：[1]淮阴工学院建筑工程学院,江苏淮安223001 [2]淮安市建筑工程检测中心有限公司,江苏淮安223001

出　　处：《淮阴工学院学报》2015年第1期46-49,共4页Journal of Huaiyin Institute of Technology

基　　金：淮安市"533"拔尖人才支持项目

摘　　要：建筑结构振型越高,阻尼作用造成的衰减越快,所以高振型只在振动初始才比较明显,以后则逐渐衰减,并且地震动频率接近建筑结构的低阶振型。因此,建筑抗震设计中仅考虑较低频率的几个振型。建筑结构固有频率和振型是振动检测中最常用的特征。介绍了传统的动态应变测量原理,分析了电阻式传感器在结构检测中存在问题,为了克服传统的方法的不足,介绍了使用激光多普勒测速仪远程微动测量方法、特点,并比较了激光多普勒测速仪和粒子成像测速技术的异同。The higher the mode shape of building structure, the faster the vibration decays caused by damping effect. The higher mode vibration is significant only in the initial stage and it gradually declines. The ground motion frequency is close to the low order modes of structure. Therefore, only several modes of lower frequency are considered in building seismic design. Natural frequencies and mode shapes are most commonly used to de- tect structure vibration characteristics. The dynamic strain measurement of traditional theory was first deduced in this paper, and the existing problems of resistance type sensor in structure detection were figured out. In order to overcome the shortcomings in traditional measuring methods, the characteristics and development direction of using laser Doppler velocimeter remote micro measurement method was introduced, including the basic principle and method to remove the influence of laser Doppler velocimeter vibration, and the similarities and differences between laser Doppler velocimeter and particle image velocimeter were described.

关 键 词：建筑结构 抗震检测 远程微力测量 激光多普勒测速仪 

分 类 号：TU317.4[建筑科学—结构工程]