Quality inspection of highway guardrail posts partly embedded based on longitudinal guided waves technology

Cun-fu He; Xue-pu Wang; Xiu-yan Wang; Bin Wu

doi:10.1117/12.839353

25 August 2009 Quality inspection of highway guardrail posts partly embedded based on longitudinal guided waves technology

Cun-fu He, Xue-pu Wang, Xiu-yan Wang, Bin Wu

Author Affiliations +

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73755Q (2009) https://doi.org/10.1117/12.839353
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

The guardrail is one of the most important attachments in the highway. The compactness of the soil around it, called as embedded quality, determines the crashworthiness performance of the guardrails. Unqualified guardrail posts can not avoid severe accidents happen. But there are not efficient nondestructive detecting methods until now. So we research on the applications of ultrasonic guided waves technology to inspect guardrail post length and embedded quality. For cylindrical guardrail posts, ultrasonic guided waves can be used for their length measurement and evaluation of embedded quality. In this paper, the effect of the parameters of soil including density, the velocities of longitudinal and shear waves on propagation characteristics of longitudinal guided waves modes is analyzed and verified experimentally. It indicates the change of soil characteristics have no effect on group velocity of L(0,2) mode in the frequency range from 160kHz to 270kHz and it will convenient to the length measurement of guardrail post with different embedded conditions. However, the attenuation of the same L(0,2) mode increases monotonously with increasing soil compactness. As a result, L(0,2) mode in the frequency range from 160kHz to 270kHz can be used to evaluate embedded quality of guardrail post to improve the safety of guardrails in the highway.

Citation Download Citation

Cun-fu He, Xue-pu Wang, Xiu-yan Wang, and Bin Wu "Quality inspection of highway guardrail posts partly embedded based on longitudinal guided waves technology", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73755Q (25 August 2009); https://doi.org/10.1117/12.839353

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