超声面波法在混凝土强度检测中的应用研究

doi:10.11720/wtyht.2020.1372

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Abstract

Concrete is the main material in construction engineering,and its quality is closely related to people's life and property.The strength grade is an important indicator of the quality of the concrete,so the strength of the concrete structure needs to be tested. In this paper,the surface wave velocity inversion is realized by the least square method to obtain the shear wave velocity structure of the target concrete structure,the strength value is calculated based on the elastic modulus method and the power function fitting method,and then the concrete strength is evaluated.The results are as follows:First,the shear wave velocity structure of concrete structure can be obtained effectively by using the ultrasonic surface wave method.Second,both the elastic modulus method and the power function fitting method can evaluate the strength of concrete,which is effective and the elastic modulus method can meet the actual accuracy requirements,thus providing a new way for the quality detection of concrete.

Key words： Rayleigh wave elastic modulus power function fitting concrete strength

Received: 22 July 2019 Published: 24 June 2020

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	Articles by authors
	Dao-Huang YANG
	Jiang-Ping LIU
	Fei CHENG
	Kai-Xuan PANG

Cite this article:

Dao-Huang YANG,Jiang-Ping LIU,Fei CHENG, et al. The application of ultrasonic surface wave method to concrete strength testing[J]. Geophysical and Geochemical Exploration, 2020, 44(3): 626-634.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1372 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I3/626

Medium parameters of two-layer concrete beam model

Rayleigh wave seismic record (a) and dispersion curve (b) of two-layer concrete beam model

Inversion results of damped least squares algorithm for two-layer concrete model
a—fitting of numerical simulation of dispersion curve and inversion result;b—S-wave velocity inversion results

The relationship between strength and thickness of two-layer concrete beam model

Rayleigh wave data acquisition

Raleigh wave recording of concrete beam

Measured Rayleigh wave dispersion curve

Inversion results of damped least squares algorithm for concrete beam CB1
a—fitting of measured dispersion curve and inversion result;b—S-wave velocity inversion results

Inversion results of damped least squares algorithm for concrete beam CB2
a—fitting of measured dispersion curve and inversion result;b—S-wave velocity inversion results

Inversion result of concrete beam

The relationship between elastic modulus and thickness

Strength grades of concrete

Comparison of elastic modulus method and rebound method

Comparison of power function fitting method and rebound method

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