Numerical Simulations and Laboratory Tests to Explore the Potential of Ground-Penetrating Radar (GPR) in Detecting Unfilled Joints in Brick Masonry Structures
| Autor: | Rani Hamrouche, Gérard Ballivy, Jean-Paul Balayssac, Jamal Rhazi, G. Klysz |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | International Journal of Architectural Heritage. 6:648-664 |
| ISSN: | 1558-3066 1558-3058 |
| DOI: | 10.1080/15583058.2011.597484 |
| Popis: | The objective of this work is to define the sensitivity of the ground-penetrating radar (GPR) signal to detect deep unfilled joint defects in the inspection of brick masonry structures and, in particular, to look for deep unfilled joint defects. This definition will help the manager to quantify the volume of mortar to be reinjected in case of reinforcing work. As a first approach, a numerical modeling of a GPR antenna with a central frequency of 1.5 GHz is used to define the sensitivity of radar waves to detect unfilled joint defects. The simulations are carried out in a separated bistatic configuration. For each transmitter position, several signal acquisitions are implemented using a regularly spaced crescent pattern for the receivers. A specific algorithm for the processing of the simulated signals has been developed that uses the inverse methods applied in the time domain and specifically a method of phase focusing to locate the defects. The processing analyzes the travel times of the reflected signal... |
| Databáze: | OpenAIRE |
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