| Pavement is one of the main important infrastructures in the airport, which undertakes the important tasks of the airport, such as aircrafts’ taking-off, landing,slither, parking and so on.It is the basic platform for airport operations. There are usually some unpredicted damages in the airport concrete pavement before its service life which threats the operation of aircrafts. Therefore, it is particularly important to detect the structure performance and monitoring its health condition for the concrete pavement. Due to the light settings on the pavement, the airport pavement is paneled with continuous distribution lamp holes in the working conditions. Here the lamp holes were used to test shear strains in the holes. Then the pavement structure stress monitoring technology that is the flexural-tensile strains on bottom of the concrete plate were obtained based on the shear strains tested in the holes was proposed for monitoring the condition of the pavement and forewarning in the routine maintenance.Research details are as follows:(1) Based on the thick plate theory, the theoretical solution of the thick plate was deduced by Fourier trigonometric series. And the deflection and various components of stress and strain in the thick plate on elastic foundation were obtained by MATLAB software. Also the above results were verified by the finite element simulation. Further the correlation between the shear strains in holes at different locations and the maximum flexural-tensile strains on bottom of the plate was established.(2)Based on ABAQUS software, the distribution regularities and influence parameters of shear strains in the holes on landing strip plates of the pavement under aircraft load are researched. The shear strains in plate with holes and no holes, with through-hole and blind hole are analyzed respectively.(3)Using the fiber Bragg Grating sensor(FBG), the load test of concrete plate with holes was designed to verify the FBG sensors. And on the plate strain gauges and FBG sensors were arranged symmetrically. Further, another load test was designed using plate with holes similar to the runway pavement plate to verify the testing technology proposed in this paper.(4)By finite element analysis and experimental research on the concrete plate with holes under moving and dynamic loads, the correlations between the shear strains and the flexural-tensile strains were established too. And damages detecting method wasproposed here based on the wavelet packet analysis. |
PDF Full Text Request