不同骨料混凝土模型中瑞利波传播特性研究

doi:10.11720/wtyht.2023.0086

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Abstract

To avoid aggregate interference on the detection target in concrete quality detection by Rayleigh waves, the abnormal signals from the aggregate and the target should be distinguished for high detection reliability. Hence, this study explored the propagation characteristics of Rayleigh waves in aggregate concrete. By building the mesostructural random aggregate models and employing the high-order staggered-grid finite difference scheme, this study examined the effects of the randomness, shape, size, and content of aggregate on the Rayleigh wave field and dispersion curves, thus obtaining the Rayleigh wave scattering, energy attenuation, distortion, and dispersion curve characteristics under different aggregate parameters. Based on the forward modeling data of different aggregate concrete models, this study quantitatively analyzed the sizes and influence ranges of aggregate-induced anomalies of the Rayleigh wave field and dispersion curves. The results are as follows. The randomness and content of aggregate could affect the energy attenuation of direct Rayleigh waves. The Rayleigh wave field was slightly influenced by the aggregate shape but significantly impacted by the aggregate size. When the aggregate size exceeded half of the dominant wavelength, Rayleigh waves would produce strong scattering, distorting its waveforms. In contrast, these aggregate parameters caused no anomalies in the dispersion curves. Therefore, data analysis using dispersion curves can avoid aggregate interference on the target in concrete quality detection by Rayleigh waves.

Key words： high-frequency Rayleigh wave concrete quality detection aggregate property dispersion curve

Received: 06 March 2023 Published: 27 October 2023

ZTFLH:	TU43
	P631.4

Corresponding Authors: ZHANG Da-Zhou E-mail: zhubaoxiang2022@163.com;dazhou2010@csu.edu.cn

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	Articles by authors
	Zhu-Bao XIANG
	Da-Zhou ZHANG
	De-Bing ZHU
	Ming-Zhi LI
	Zhang-Qiang XIONG

Cite this article:

Zhu-Bao XIANG,Da-Zhou ZHANG,De-Bing ZHU, et al. Exploring the Rayleigh wave propagation characteristics in different aggregate concrete models[J]. Geophysical and Geochemical Exploration, 2023, 47(5): 1226-1235.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.0086 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I5/1226

Aggregate numerical model of three shapes

Material parameters of concrete

Seismic records of random model

Influence for wave field of aggregate randomness

Dispersion comparison chart of random model

Waveform comparison chart of different shape aggregate

Influence for wave field of aggregate shape

Dispersion comparison chart of different shape aggregate

Waveform comparison chart of different diameter aggregate

Influence for wave field of aggregate diameter

Dispersion comparison chart of different diameter aggregate

Waveform comparison chart of different aggregate content

Influence for wave field of aggregate content

Dispersion comparison chart of different aggregate content

Comparison of anomalous dispersion curves caused by changes in cavity size

Comparison of anomalous dispersion curves caused by changes in cavity depth

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