Magnetic force induced vibration evaluation (M5) method for frequency analysis of rebar-debonding in reinforced concrete

Impact of Magnetization on the Evaluation of Reinforced Concrete Structures Using DC Magnetic Methods

“…A full review of NDT methods used in construction diagnostics, along with their advantages and disadvantages, is given in [ 3 ]. The properties of a reinforced concrete structure which can be examined with NDT methods are presented in Figure 1 .…”

“…As described in [ 3 ] and presented in Figure 1 , most of the NDT methods used in civil engineering are designed to evaluate concrete. Only methods that use an electromagnetic and mechanical wave can be effectively used for direct reinforcement assessment.…”

“…Only methods that use an electromagnetic and mechanical wave can be effectively used for direct reinforcement assessment. The following methods can be distinguished in the mechanical group: high-frequency, active ultrasonic testing methods [ 3 , 4 , 5 ]; low-frequency-active mechanical methods [ 3 , 6 ], and passive-acoustic emission (AE) [ 7 ].…”

“…Results can be really accurate and relatively easy to interpret. Lower excitation frequencies may be used in some versions of the magnetic flux leakage (MFL) and the magnetic force induced vibration evaluation MFIVE method [ 3 ] or in the method similar to MFIVE described in [ 6 ]. Both of these methods use low-frequency magnetic waves to induce rebar vibration.…”

“…The source and detector usually must be placed on both sides of the object. Moreover, this method generates risks for human health [ 3 ].…”