摘要
通过预埋缺陷于装配式结构中的叠合墙,对不同缺陷厚度进行超声波透射法检测,分析出时、频域,通过对波速进行数理分析,得出以下主要结论:(1)波速与混凝土强度呈现弱相关性;(2)波速与缺陷空隙厚度呈强相关性,其关系可以进行定量分析,缺陷空隙厚度越大,波速越小;(3)缺陷厚度与峰频率呈强相关性,但其关系只能作为一种定性分析,缺陷厚度越大,混凝土的峰频率幅值衰减得越大。
In this article,we pre-embedded the flaw inside the layered wall which is part of prefabricated structure,and used the ultrasonic transmission method to measure different flaw thicknesses and resulting in the time-frequency domain.Based on the analysis of the wave velocity from time domain,the main conclusions were obtained as follows:1.The wave velocity is weakly correlated with the concrete strength;2.There is a strong correlation between wave velocity and flaw thickness,which can be quantitatively analyzed.The larger the flaw thickness is,the smaller the wave velocity is;3.There is a strong correlation between flaw thickness and peak frequency,but the relationship can only be used as a qualitative analysis.The greater the flow thickness,the greater the attenuation of the peak frequency amplitude from concrete.
作者
郑茗旺
项驰轩
王奎华
杨学林
余亚超
王亚辉
ZHENG Mingwang;XIANG Chixuan;WANG Kuihua;YANG Xuelin;YU Yachao;WANG Yahui(Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China;Zhejiang Province Institute of Architectural Design and Research,Hangzhou 310006,China;Baoye Group Company Limited,Shaoxing 312030,China)
出处
《结构工程师》
2021年第6期190-194,共5页
Structural Engineers
基金
浙江省重大研发计划项目(2018C03033-1)。
关键词
超声波透射法
无损试验
波速定量分析
小波变换分析
ultrasonic transmission method
nondestructive testing
qualitative analysis of wave velocity
wavelet transform analysis
