Long-Term Pavement Performance Ohio SPS-1 and SPS-2 Dynamic Load Response Data Processing

3. OBJECTIVE

The primary objective of this study was to address the SPS-1 (AC) and SPS-2 (PCC) DLR data issues in SDR 22.0, which were identified in Ecompex-75-77 and the technical memorandum, Investigation of Ohio DLR data in LTPP Database, by re-interpreting the SPS-1 and SPS-2 DLR raw traces. (See references 2-6.) Processing the DLR raw data involved the following steps:

1. Smoothing the raw traces.
   
   
2. Performing quality control (QC) analysis for strain gauge, LVDT, and PC sensors by categorizing them as producing "good," "maybe," and "not good" traces and graphically depicting the results in the profile view of a test section's sensor layout.
   
   
3. Extracting trace peaks and valleys.
   
   
4. Correcting sensor locations and wheelpath offsets.
   
   
5. Populating the DLR tables in the next SDR using this study's processed DLR data.