Objective The maintenance of buildings requires four stages of surveillance, or monitoring. These 4 areas are: early assessment of damage, detailed investigations, decision for repair work and verification of repair work. For each stage of monitoring, several nondestructive testing (NDT) technologies can be applied.Improvement was aimed for in 5 NDT technologies: concrete cover, dynamic behaviour, acoustic emission, actual prestress and light guide sensoring.In order to improve the accuracy and statistical interpretation of concrete cover measurement, some software and hardware were developed. The information used in the programs came from large scale testing.Concerning dynamic behaviour, a critical statement of applicability and efficiency was determined, based on large scale experiments.It was proved that acoustic emission analysis of concrete offers the possibility of detecting cracks by their crack border friction, provided the structure is under dynamic load. Large scale tests proved that acoustic emission analysis can be applied for the verification of repair work.First applications of micromagnetic techniques in civil engineering for the determination of actual prestress were tried. Due to the broad scattering of chemical content of the prestressing steel and the various mechanical treatments during the production process, the results of micromagnetic measurements must be treated carefully. For the determination of actual prestressing forces, a multiparameter analysis is needed.Monitoring systems such as light guide sensors have to stay stable and reliable during a period of time comparable to the lifetime of the structure itself. Tests were conducted to evaluate performance property fatigue.DEVELOPMENT AND REFINEMENT OF A NUMBER OF RELATED TECHNIQUES FOR ASSESSING THE CONDITION OF REINFORCED CONCRETE STRUCTURES. AT PRESENT, FAULTS ARE DISCOVERED AT AN ADVANCED STAGE OF DAMAGE WHEN COSTLY REPAIR WORK IS REQUIRED. THE APPLICATION OF NON-DESTRUCTIVE TESTING TECHNIQUES IMPROVES THE POSSIBILITIES OF ADVANCED WARNING OF INCIPIENT FAILURE AND THE QUALITY ASSURANCE OF REPAIR WORKS. Fields of science natural sciencescomputer and information sciencessoftwareengineering and technologycivil engineeringnatural sciencesphysical sciencesacousticsengineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringsensors Programme(s) FP1-BRITE - Multiannual research and development programme (EEC) in the fields of basic technological research and the applications of new technologies (BRITE), 1985-1988 Topic(s) Data not available Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator DARMSTADT UNIVERSITY OF TECHNOLOGY Address Karolinenplatz 5 Darmstadt Germany See on map EU contribution € 0,00 Participants (4) Sort alphabetically Sort by EU Contribution Expand all Collapse all FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. Germany EU contribution € 0,00 Address Universitaet, gebaeude 37 66123 Saarbruecken See on map König und Heunisch Germany EU contribution € 0,00 Address 6000 Frankfurt am main See on map Liebig International Verwaltungs GmbH Germany EU contribution € 0,00 Address 64319 Pfungsstadt See on map Strabag SA/NV Belgium EU contribution € 0,00 Address 1980 Stabroek See on map
