摘要
为研究钢纤维混凝土纵波声弹性系数与钢纤维体积掺量之间的相关性,进行了单轴受压状态下的纵波声弹性系数测量实验。混凝土试件钢纤维体积掺量分别取0、0.6%、1.2%、1.8%,并利用特制夹具测量加载方向上与垂直于加载方向上的声弹性系数。对测量数据的拟合结果表明:钢纤维混凝土的声弹性系数受钢纤维体积掺量影响,其中0.6%体积掺量的钢纤维混凝土声弹性系数最小;加载方向上的声弹性系数随钢纤维体积掺量的变化趋势与垂直于加载方向上的一致。实验结果验证了利用声弹性系数来判断钢纤维的体积掺量的可行性,通过测量垂直于加载方向上的声弹性系数可以估计钢纤维混凝土中钢纤维的掺量,为钢纤维混凝土的超声诊断提供参考。
In order to study the correlation between the acoustic elasticity coefficient of longitudinal wave in steel fiber reinforced concrete and the volume fraction of the steel fiber, the longitudinal wave acoustic elasticity coefficient under uniaxial compression was measured. The volume fraction of steel fiber in the concrete specimens was taken as 0, 0.6%, 1.2% and 1.8%,and acoustic elasticity coefficientin the loading direction and perpendicular to the loading direction was measured with a special fixture. The fitting results of the measured data show that the acoustic elasticity coefficient is affected by the volume fraction of steel fiber, and the acoustic elasticity coefficient of SFRC with 0.6% volume fraction has the smallest value. The change trend of the acoustic elasticity coefficient in the loading direction with the volume fraction of steel fiber is consistent with that perpendicular to the loading direction. The experimental results have verified the feasibility of using the acoustic elasticity coefficient to judge the volume fraction of steel fiber. By measuring the acoustic elasticity coefficient perpendicular to the loading direction, the content of steel fiber in steel fiber reinforced concrete can be estimated, which can provide a reference for ultrasonic diagnosis of steel fiber reinforced concrete.
作者
徐浩
杨予
王毅
包挺
胡光晓
XU Hao;YANG Yu;WANG Yi;BAO Ting;HU Guangxiao(School of Civil Engineering and Architecture,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2022年第2期231-237,共7页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
住房和城乡建设部项目(2016-K5-045)。
关键词
钢纤维混凝土
体积掺量
声弹性系数
无损检测
超声波波速
steel fiber reinforced concrete
volume fraction
acoustic elasticity coefficient
nondestructive test
ultrasonic velocity
