CAJ | 학술논문

采用压电阻抗技术(EMI)对三层钢框架进行了损伤模拟实验,通过拧松钢框架节点的螺栓来模拟损伤,测试了钢框架在不同损伤程度下的电导纳值.并采用均方差(Root Mean Square Deviation, RMSD)、协方差(Covariance)和均方根(Root Mean Square, RMS)作为损伤程度参数指标对实验数据进行了分析,验证了利用压电阻抗技术进行结构健康检测的有效性,表明 RMSD 指标对反映结构损伤程度更准确可靠.
채용압전조항기술(EMI)대삼층강광가진행료손상모의실험,통과녕송강광가절점적라전래모의손상,측시료강광가재불동손상정도하적전도납치.병채용균방차(Root Mean Square Deviation, RMSD)、협방차(Covariance)화균방근(Root Mean Square, RMS)작위손상정도삼수지표대실험수거진행료분석,험증료이용압전조항기술진행결구건강검측적유효성,표명 RMSD 지표대반영결구손상정도경준학가고.
An experiment conducted for probing damage detection is conducted for a three-layered steel frame using electro-mechanical impedance (EMI) technique. Damages are introduced by completely loosening bolts over several locations on the structure and then the piezoelectric admittance signatures are obtained under various damage severities. Experimental data are then analyzed by RMSD (Root Mean Square Deviation), Covariance and RMS (Root Mean Square) for damage identification quantitatively. The findings show that the EMI technique integrated with RMSD index can identify the damage severity and location more effectively, and thus the present method can provide a reliable and accurate technique for structural health monitoring.