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Applications and Limitations of the Spectral-Analysis-of-Surface-Waves Method

J. C. Sheu / K. H. Stokoe / J. M. Roesset / W. R. Hudson

The Spectral-Analysis-of-Surface-Waves (SASW) method is an in situ seismic method for nondestructively determining the modulus profiles of geotechnical, pavement, and structural systems. By generating and measuring surface waves in the field, a dispersion curve, a plot of surface wave velocity versus wavelength, is constructed. This dispersion curve is then inverted in the office. Inversion is an analytical process for reconstructing the shear wave velocity profile from the field dispersion curve. Layering and the Young's modulus of each layer are readily obtained from the shear wave velocity profile. To understand the impact from the existence of reflecting boundaries in the real world such as joints or edges in a pavement system, a simplified model was developed. Field experiments were then performed to verify this model. Several case studies are presented to illustrate the versatility of the SASW method, and a MASSCOMP minicomputer was introduced in an attempt to automate the SASW method.

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Applications and Limitations of the Spectral-Analysis-of-Surface-Waves Method

J. C. Sheu / K. H. Stokoe / J. M. Roesset / W. R. Hudson

The Spectral-Analysis-of-Surface-Waves (SASW) method is an in situ seismic method for nondestructively determining the modulus profiles of geotechnical, pavement, and structural systems. By generating and measuring surface waves in the field, a dispersion curve, a plot of surface wave velocity versus wavelength, is constructed. This dispersion curve is then inverted in the office. Inversion is an analytical process for reconstructing the shear wave velocity profile from the field dispersion curve. Layering and the Young's modulus of each layer are readily obtained from the shear wave velocity profile. To understand the impact from the existence of reflecting boundaries in the real world such as joints or edges in a pavement system, a simplified model was developed. Field experiments were then performed to verify this model. Several case studies are presented to illustrate the versatility of the SASW method, and a MASSCOMP minicomputer was introduced in an attempt to automate the SASW method.

Applications and Limitations of the Spectral-Analysis-of-Surface-Waves Method

J. C. Sheu / K. H. Stokoe / J. M. Roesset / W. R. Hudson

The Spectral-Analysis-of-Surface-Waves (SASW) method is an in situ seismic method for nondestructively determining the modulus profiles of geotechnical, pavement, and structural systems. By generating and measuring surface waves in the field, a dispersion curve, a plot of surface wave velocity versus wavelength, is constructed. This dispersion curve is then inverted in the office. Inversion is an analytical process for reconstructing the shear wave velocity profile from the field dispersion curve. Layering and the Young's modulus of each layer are readily obtained from the shear wave velocity profile. To understand the impact from the existence of reflecting boundaries in the real world such as joints or edges in a pavement system, a simplified model was developed. Field experiments were then performed to verify this model. Several case studies are presented to illustrate the versatility of the SASW method, and a MASSCOMP minicomputer was introduced in an attempt to automate the SASW method.

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Title:

Applications and Limitations of the Spectral-Analysis-of-Surface-Waves Method

Contributors:

J. C. Sheu (author) / K. H. Stokoe (author) / J. M. Roesset (author) / W. R. Hudson (author)

Publication date:

1986

Size:

292 pages

Type of media:

Report

Type of material:

No indication

Language:

English

Keywords:

Engineering Materials , Nondestructive Testing , Structural Mechanics , Structural Analyses , Spectrum analysis , Surface waves , Modulus of elasticity , Pavements , Seismic reflection method , Elastic properties , Wavelengths , Phase velocity , Wave dispersion , Computer applications

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