Title :
An efficient forward model of ground penetrating radar for sensing deteriorated bridge decks
Author :
Tajdini, Mohammad M. ; Rappaport, Carey M.
Author_Institution :
Electr. & Comput. Eng. Dept., Northeastern Univ., Boston, MA, USA
Abstract :
Ground penetrating radar (GPR) is a viable tool for fast nondestructive sensing of concrete structures. The finite difference frequency domain (FDFD) method can be used to simulate subsurface wave scattering. A full 3D FDFD is preferred in general but is computationally burdensome. In this paper, we study deteriorated concrete bridge decks via a comprehensive full 3D analytic method. The Green´s function analysis in combination with the method of moments (MoM) is used to effectively model a layered concrete structure with an embedded grid of rebars. The scattering effect of subsurface defects is computed efficiently via the Born approximation. The analytic method is validated well with the FDFD method.
Keywords :
Green´s function methods; bridges (structures); concrete; electromagnetic wave scattering; finite difference methods; frequency-domain analysis; ground penetrating radar; method of moments; nondestructive testing; rebar; remote sensing by radar; Born approximation; Green´s function analysis; comprehensive full 3D analytic method; concrete structures; deteriorated bridge decks sensing; embedded grid; fast nondestructive sensing; finite difference frequency domain method; forward model; full 3D FDFD; ground penetrating radar; layered concrete structure; method of moments; rebars; scattering effect; subsurface defects; subsurface wave scattering; Bridges; Concrete; Electric fields; Green´s function methods; Ground penetrating radar; Method of moments; Scattering;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-5315-1
DOI :
10.1109/APS.2013.6711171
