CAJ | 학술논문

制备了C60碳纤维混凝土，并对其进行高温处理，模拟碳纤维混凝土的高温损伤状态。采用声波测试仪对试件受高温前后的超声特性进行了测试，通过对信号进行小波变换处理，同时以高温前后的纵波波速变化来定义损伤因子。研究结果表明，随着温度的升高，信号频谱的主频不断向低频方向移动，频率幅值不断减小；损伤因子则随温度升高而呈现出指数增大趋势，表明碳纤维混凝土结构的高温损伤与频谱和纵波波速变化有密切联系。
제비료C60탄섬유혼응토，병대기진행고온처리，모의탄섬유혼응토적고온손상상태。채용성파측시의대시건수고온전후적초성특성진행료측시，통과대신호진행소파변환처리，동시이고온전후적종파파속변화래정의손상인자。연구결과표명，수착온도적승고，신호빈보적주빈불단향저빈방향이동，빈솔폭치불단감소；손상인자칙수온도승고이정현출지수증대추세，표명탄섬유혼응토결구적고온손상여빈보화종파파속변화유밀절련계。
The damage statue of prepared C60 carbon fiber reinforced concrete by using high temperature processing was investigated.By processing wavelet transform signal and define the changing of compressional wave velocity as damage factor, the ultrasonic feature of C60 carbon fiber reinforced concrete was studied by using acoustic tester before and after high temperature treatment. The results show that the dominant frequency shifts to the low frequency and the amplitude decreases, while the damage factor enlarges with the increasing of temperature. It indicated that the high temperature dam-age of carbon fiber reinforced concrete have close relationship with signal frequency and the changing of wave velocity.