A novel damage detection technique of reinforced concrete structure on higher frequency dependency of natural frequency

在以往的研究中，结构健康监测的基本原理是结构的动力性能随结构损伤而变化，因此结构健康监测有望成为判断地震后建筑物是否可以继续使用的新技术。本研究通过实验阐明了钢筋混凝土构件在高频振动作用下共振频率的变化，也表明即使没有获得健康状态下动力特性的先验数据，这些变化也可以作为结构健康监测的基本原理。

Stru ctural health monitoring is expected to be a next generation technology for judging whether a quake-stricken building can be continuously used or not, whose basic principle has been that the dynamic properties change with structural damage in the previous studies. This study experimentally clarifies the changes in resonance frequency of reinforced concrete members due to high-frequency vibration, and also shows that these changes can be a basic principle of structural health monitoring applied even when a p riori data of dynamic properties in the healthy state are not obtained.