A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Rapid Determination of Pavement Moduli with Spectral-Analysis-of-Surface-Waves Method
The Spectral-Analysis-of-Surface-Wave (SASW) method has been used as a nondestructive test method for determining elastic modulus profiles of pavement systems. To implement the method in day-to-day activities of any pavement evaluation program, three steps are necessary. First, field data acquisition should be carried out rapidly. This has been achieved by utilizing a newly-developed device called the Seismic Pavement Analyzer (patent pending). Second, the raw data should be manipulated to a dispersion curve in an automated manner. An algorithm has been developed which can perform this task. The last step is to determine the elastic modulus of different layers from the dispersion curve. A backcalculation technique based upon the generalized inverse theory is developed. The technique provides a fast and automated procedure for simultaneously determining moduli and thickness of pavements. In addition, some description of uncertainty in the backcalculated results is provided. In this report, the development of these algorithms are discussed. The speed and accuracy as well as the limitations of the algorithms are demonstrated. Several actual field case histories are included to exhibit the usefulness of the method in actual field testing.
Rapid Determination of Pavement Moduli with Spectral-Analysis-of-Surface-Waves Method
The Spectral-Analysis-of-Surface-Wave (SASW) method has been used as a nondestructive test method for determining elastic modulus profiles of pavement systems. To implement the method in day-to-day activities of any pavement evaluation program, three steps are necessary. First, field data acquisition should be carried out rapidly. This has been achieved by utilizing a newly-developed device called the Seismic Pavement Analyzer (patent pending). Second, the raw data should be manipulated to a dispersion curve in an automated manner. An algorithm has been developed which can perform this task. The last step is to determine the elastic modulus of different layers from the dispersion curve. A backcalculation technique based upon the generalized inverse theory is developed. The technique provides a fast and automated procedure for simultaneously determining moduli and thickness of pavements. In addition, some description of uncertainty in the backcalculated results is provided. In this report, the development of these algorithms are discussed. The speed and accuracy as well as the limitations of the algorithms are demonstrated. Several actual field case histories are included to exhibit the usefulness of the method in actual field testing.
Rapid Determination of Pavement Moduli with Spectral-Analysis-of-Surface-Waves Method
S. Nazarian (author) / D. Yuan (author) / M. R. Baker (author)
1995
87 pages
Report
No indication
English
| British Library Conference Proceedings | 2010