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A Proposed Method Of Calibration And Correlation Of Weigh-In-Motion Systems, David L. Allen, Jerry G. Pigman
A Proposed Method Of Calibration And Correlation Of Weigh-In-Motion Systems, David L. Allen, Jerry G. Pigman
Kentucky Transportation Center Research Report
There are various types of weigh-in-motion systems currently in use by agencies that collect weight data. These include load cells, bending plate, capacitance pads, piezoelectric cables, and bridge WIM's. The response and behavior of these systems differs from one type to another. Most states calibrate these systems by one of two methods. The first is to calibrate by running a truck or trucks of known weights across the scales a number of times. The second is to use a sample of trucks from the traffic stream.
This report details a field calibration and correlation test site between a slow-speed WIM …
A Rheological Study Of Cohesive Soils, David L. Allen
A Rheological Study Of Cohesive Soils, David L. Allen
Kentucky Transportation Center Research Report
An attempt has been made to describe the mechanistic behavior of remolded and undisturbed soils by application of the principles of rheology. This was accomplished by approximating and comparing the data obtained from transient creep tests and relaxation tests to the mathematical behavior of mechanical impedance models. The data were also analyzed by transforming static moduli and compliances into dynamic values by the application of Fourier transforms. Distribution functions of relaxation and retardation times, obtained by the application of LaPlace transforms, are presented.
All soils tested exhibited similar dynamic moduli and complince curves indicating that soil type had little effect …