Dynamic analysis of non-destructive tests

• Autores: Wouter van Bijsterveld, Rafael L. Alvarez Loranca
• Localización: Bearing capacity of roads, railways and airfields: proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields, Champaign, Illinois, USA, June 29-July 2, 2009 / Erol Tutulumluer (dir.), Imad L. Al-Qadi (dir.), Vol. 1, 2009, ISBN 9780415804325, págs. 653-660
• Idioma: inglés
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• Resumen

  • The use of static backcalculation procedures for the interpretation of Falling Weight Deflectometer (FWD) measurement results is commonly accepted. However, to obtain accurate results, it is necessary to know the structure of the pavement in detail, which often requires coring, thereby annulling the essence of nondestructive testing. Also, the current backcalculation procedures are not accurate in predicting the properties of surface layers, especially in semi-rigid pavements. This paper describes the research activities initiated by GEOCISA to improve the pavement analysis procedures for non-destructive tests. In the first place the load and displacement histories obtained from FWD tests were analyzed in order to establish a dynamic characterization procedure of the data. Extensive dynamic finite element analyses were carried out to model and simulate the dynamic behavior of the pavement during a FWD test. Secondly a study has been carried out into the application of seismic measurements to obtain additional information regarding the surface layers.