A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of the Use of Geophones and Accelerometers for Monitoring Pavement Deflections, Using Accelerated Pavement Tests
In accelerated pavement tests performed at IFSTTAR, it is common to perform continuous deflection measurements under applied loading, using deflection sensors. These sensors, which consist of an LVDT attached to a rod anchored at a depth of about 4 m, are difficult to install and relatively expensive. In this project, the possibility of using geophones or accelerometers, as an alternative method to measure pavement deflections has been investigated. Geophones and accelerometers measure respectively the vertical velocity and the vertical acceleration, and by integrating their signals, it is possible to calculate the deflection. Two types of geophones, and two types of accelerometers have been selected for the study. They have first been submitted to laboratory tests, on a vibrating table, simulating pavement deflections signals. Based on these tests, suitable signal treatment methodologies, to filter and integrate the signals, to obtain reliable deflection measurements, have been developed. The sensors have then been installed in an experimental pavement section, tested on the IFSTTAR APT facility. Deflections obtained with the geophones and accelerometers have been measured under different load conditions. The obtained values were in good agreement with those measured with a reference deflection sensor.
Evaluation of the Use of Geophones and Accelerometers for Monitoring Pavement Deflections, Using Accelerated Pavement Tests
In accelerated pavement tests performed at IFSTTAR, it is common to perform continuous deflection measurements under applied loading, using deflection sensors. These sensors, which consist of an LVDT attached to a rod anchored at a depth of about 4 m, are difficult to install and relatively expensive. In this project, the possibility of using geophones or accelerometers, as an alternative method to measure pavement deflections has been investigated. Geophones and accelerometers measure respectively the vertical velocity and the vertical acceleration, and by integrating their signals, it is possible to calculate the deflection. Two types of geophones, and two types of accelerometers have been selected for the study. They have first been submitted to laboratory tests, on a vibrating table, simulating pavement deflections signals. Based on these tests, suitable signal treatment methodologies, to filter and integrate the signals, to obtain reliable deflection measurements, have been developed. The sensors have then been installed in an experimental pavement section, tested on the IFSTTAR APT facility. Deflections obtained with the geophones and accelerometers have been measured under different load conditions. The obtained values were in good agreement with those measured with a reference deflection sensor.
Evaluation of the Use of Geophones and Accelerometers for Monitoring Pavement Deflections, Using Accelerated Pavement Tests
Lecture Notes in Civil Engineering
Chabot, Armelle (editor) / Hornych, Pierre (editor) / Harvey, John (editor) / Loria-Salazar, Luis Guillermo (editor) / Bahrani, Natasha (author) / Blanc, Juliette (author) / Hornych, Pierre (author) / Menant, Fabien (author)
Accelerated Pavement Testing to Transport Infrastructure Innovation ; Chapter: 54 ; 526-535
2020-08-26
10 pages
Article/Chapter (Book)
Electronic Resource
English
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