Damage caused by accidental loads - assessing of damaged reinforced concrete

摘要

Accidental loads - for example a vehicle impact or blast and shock waves due to detonations - leadto damages in reinforced concrete structures. These damages are characterized by a central zone,which is visually recognizable and also an obvious invisible damage in the surrounding materialcaused by shock wave propagation through the concrete. To make a statement concerning thestructural behaviour of reinforced concrete structures damaged in such a manner and to predict theirresidual load bearing capacity in a further step, information on the damage is needed. To assess thesize of the total damaged zone consisting of visible and obvious invisible parts, non-destructivetests (NDT) have been carried out. Investigations with the acoustical-based Impact-Echo-methodand the Radar system based on electro-magnetic waves show good applicability for that problemand help to learn more about damages caused by high dynamic loads.