Stress Level Measurement in Prestressed Steel Strands Using Acoustoelastic Effect

被引:63
作者
Chaki, S. [1 ]
Bourse, G. [1 ]
机构
[1] Ecole Mines Douai, Dept Technol Polymeres & Composite & Ingn Mecan T, F-59508 Douai, France
关键词
Nondestructive testing; Acoustoelastic effect; Ultrasonic guided waves; Stress measurement; Prestressed steel strands;
D O I
10.1007/s11340-008-9174-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In-situ health monitoring of the tensioning components such as strands, tendons, bars, anchorage bolts, etc. used in civil engineering structures, namely bridges, dams, nuclear power plants, etc. is extremely important to ensure security of users and environment. This paper deals with a guided ultrasonic wave procedure for monitoring the stress levels in seven-wire steel strands (15.7 mm in diameter). For this purpose, simplified acoustoelastic formulations were derived from the acoustoelasticity theory and acoustoelastic measurements were performed. The results from acoustoelastic calibration tests and an anchorage block of seven-wire steel strands are presented and discussed. They show the potential and the suitability of the proposed guided wave method for evaluating the service stress levels in the prestressed seven-wire steel strands.
引用
收藏
页码:673 / 681
页数:9
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