CAJ | 학술논문

提出了一种利用磁流变阻尼器模拟受压构件刚度折减的试验方法。通过改变磁流变阻尼器通电电流来调整受压构件的抗压刚度的大小。在输电塔桁架截断动力模型试验中，利用该方法模拟受压构件刚度的瞬时折减。结合短时傅里叶变换方法，对构件发生刚度折减的时间进行损伤识别。试验结果验证了该方法的有效性。
제출료일충이용자류변조니기모의수압구건강도절감적시험방법。통과개변자류변조니기통전전류래조정수압구건적항압강도적대소。재수전탑항가절단동력모형시험중，이용해방법모의수압구건강도적순시절감。결합단시부리협변환방법，대구건발생강도절감적시간진행손상식별。시험결과험증료해방법적유효성。
An experimental method to simulate stiffness reduction of a compressed member using a magneto-rheological (MR)damper was presented.The compressional stiffness of the member was adjusted by varying the current of the MR damper.In a transmission tower partial truss model dynamic test,instantaneous compressional stiffness reduction was simulated with this approach.The dynamic response of the model was processed with a joint time-frequency analysis, and then the damage time was figured out precisely.The result showed that this method is effective in model tests.