会议论文

Feng X.

Shen Y.,Dandjekpo T.,Zhu T.,Zhou J.

2011-12-11

EI、Scopus

A

The purpose of this study is to evaluate the damage of a scale model of a high concrete gravity dam during and after an earthquake. To detect the damage in the scale model, a built-in smart aggregates (SAs) were used in the scale model of a high concrete gravity dam. The electro-mechanical Impedances (EMIs) of SAs were measured for different experimental cases. The variations in the impedance spectral of the SAs were extracted as the damage-sensitive features. In this study, PZT were embedded in concrete to form a small cylinder, which is called smart aggregate. Then the smart aggregates were placed in the scale model, and the impedance/admittance signatures were measured by the impedance analyzer. The root mean square deviation (RMSD) of the impedance and admittance signatures was statistically calculated to detect the damage. The results demonstrate that the EMI-based SAs can effectively detect the seismic damage in the scale model, which shows the potential application to the structural health monitoring for high concrete gravity dam.