Preliminary Design of Testing Segment for Accelerated Loading Facility based on Finite Element Simulation Analysis

摘要

It has been recognized that full-scale Accelerated Loading Test (ALT) is the most important and direct way to obtain structural behavior of pavements subjected to traffic loading, as it avoids many assumption compared to that in the laboratory. As one part of "the Eleventh- Five-Year National Grand Technology Infrastructure Program", a full-scale Accelerated Loading Facility (ALF) with full-controlled environment conditions has been designed in China. At first, a brief introduction of ALTs all over the world was given followed by a description of track line types of two proposed schemes. Then, a comparison between stress state of the circular track and that of the oval one was analyzed through a three dimensional finite element simulation to identify a proper track line type. Finally, the testing pavement dimensions, i.e. planar sizes and depth, were determined based on the variation rules of stress components. The proposed design parameters according to finite element simulation will be helpful to the ultimate design of testing track.