| TxDOT is making increased use of nondestructive testing (NDT) for structural evaluation of pavements used in design and rehabilitation selection procedures. The Falling Weight Deflectometer (FWD) is currently the main structural evaluation tool. The Seismic Pavement Analyzer (SPA) has been demonstrated to provide information about the structural capacity that is not available with the FWD. Each of the two devices has strengths and weaknesses. However, when combined, they can provide a wealth of information not available from a single device. The feasibility of joint analysis of the data obtained from these two devices is addressed in this Thesis.; The major objective of this study was to develop an algorithm that combine the information for these devices and analyze the data jointly. The main advantage of joint inversion as compared to processing data one at a time is that the information from different methods is used to reduce the non-uniqueness inherent in the inversion. Based on the case studies, the advantages of the joint inversion method were met. The results of the JIM were reasonable and comparable to both FWD analysis and seismic analysis. |
