Laser Generation and Detection of Ultrasound in Concrete

被引：16

作者：

Jacobs L.J. ^{[1
]}

Whitcomb R.W. ^{[1
]}

机构：

[1] Sch. of Civ. and Environ. Eng., Georgia Institute of Technology, Atlanta

来源：

Journal of Nondestructive Evaluation | 1997年 / 16卷 / 2期

关键词：

Aggregate; Concrete; Laser ultrasonics; Wave scattering;

D O I：

10.1007/BF02683878

中图分类号：

学科分类号：

摘要：

Laser ultrasonic techniques are used to examine the propagation of ultrasonic waves in concrete. This optical methodology provides a repeatable, broad band generation source and an absolute detection system that does not interfere with the process being monitored. The presence of aggregate, in addition to voids and flaws, can cause wave scattering in concrete. Fast Fourier Transform techniques are used to determine the effect of aggregate size and propagation distance on the frequency content of both surface and body waves. This paper examines the scattering of ultrasonic waves in undamaged concrete and establishes the fundamentals for the application of laser ultrasonics for the material characterization and nondestructive evaluation of concrete.

引用

页码：57 / 65

页数：8

共 14 条

[1] Lew H.S., Nondestructive Testing, (1988)
[2] Maholtra V.M., Carino N.J., CRC Handbook on NDT of Concrete, (1991)
[3] Popovics S., Rose J.L., Popovics J.S., The behavior of ultrasonic pulses in concrete, Cement Concrete Res., 20, pp. 259-270, (1990)
[4] Gaydecki P.A., Burdekin F.M., Damaj W., Johns D.G., Payne P.A., The propagation and attenuation of medium-frequency ultrasonic waves in concrete: A signal analytical approach, Measure. Sci. Technol., 3, 1, pp. 126-134, (1992)
[5] Kim Y.H., Lee S., Kim H.C., Attenuation and dispersion of elastic waves in multi-phase-media, J. Phys. D: Appl. Phys., 24, 10, pp. 1722-1728, (1991)
[6] Tasker C.G., Milne J.M., Smith R.L., Recent work at the national NDT centre on concrete inspection, Brit. J. NDT, 32, 7, pp. 355-359, (1990)
[7] Sansalone M., Carino N.J., Detecting delaminations in concrete slabs with and without overlays using the impact-echo method, ACI Mater. J., 86, pp. 175-184, (1989)
[8] Lin Y., Sansalone M., Detecting flaws in concrete beams and columns using the impact-echo method, ACI Mater. J., 89, pp. 394-405, (1992)
[9] Scruby C.B., Some applications of laser ultrasound, Ultrasonics, 27, pp. 195-209, (1989)
[10] Bruttomesso D.A., Jacobs L.J., Costley R.D., Development of an interferometer for acoustic emission testing, J. Engin. Mech., 119, 11, pp. 2303-2316, (1993)

← 1 2 →