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SYSTEM IDENTIFICATION METHOD FOR BACKCALCULATING PAVEMENT LAYER PROPERTIES.
| 题名： | SYSTEM IDENTIFICATION METHOD FOR BACKCALCULATING PAVEMENT LAYER PROPERTIES. |
| 作者： | Wang-F; Lytton-RL |
| 关键词： | PAVEMENT-LAYERS; LAYER-MODULI; BACKCALCULATION-; COMPUTER-PROGRAMS; LAYER-THICKNESSES |
| 摘要： | In recent years pavement structural evaluation has relied increasingly on determining material properties by nondestructive deflection testing and backcalculation procedures. The technique used to achieve a convergence of the measured and predicted deflection basins plays an important role in all backcalculation approaches. An iterative method based on the system identification (SID) scheme is developed, and the SID program is used in conjunction with a multilayer elastic model (BISAR program) to backcalculate pavement layer properties. Numerical examples indicate that (a) the moduli backcalculated by the suggested SID method compare well with the results from MODULUS, which is a data base backcalculation program, and other developed iterative backcalculation programs; (b) the SID is a quickly converging procedure, and the influence of seed values, for a relatively wide range, on the derived results is negligible; and (c) it is able to backcalculate pavement layer thicknesses in addition to layer moduli. |
| 总页数： | Transportation Research Record. 1993. (1384) pp1-7 (4 Fig., 4 Tab., 22 Ref.) |
| 报告类型： | 科技报告 |
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