Assessment of bridge Post‐Tensioning systems using non‐destructive (ND) inspection methods

Abstract Reinforced concrete bridges with post‐tensioned cables are particularly critical structures, as the degradation of tendons is not fully detectable through conventional investigation methods and/or visual inspections, due to intrinsic nature structural typology. After shortly reviewing main applications current non‐destructive (ND) available for investigating deterioration and grout, paper presents a simple procedure rank these series metrics formulated evaluate various technologies under four different aspects: accuracy measurement, ease use, cost, impact on operation bridge. The has aim providing bridge owners decision tool which can assist in selection optimal ND technology detect particular strand or grout defect.