Abstract
The durability of concrete structure members is dependent on several factors that should be analyzed at each stage of the construction process. Omitting any of these factors might lead to the augmentation of harmful interactions and, as an effect, to safety hazards and the degradation of a structure or its parts. The article, based on several years of studies on exploited concrete structures, presents the effects of an incorrect analysis of selected factors resulting in the occurrence of faults significantly influencing the possibility of safe use of the objects. The described cases include, but are not limited to, the consequences of an improper assessment of building conditions after a biogas explosion in a fermentation chamber, the effect of a wood dust explosion, fire temperature and firefighting action on the prestressed girders, the stages of degradation of bearing structures supporting gas tanks exploited in an aggressive environment, and the consequences of omitting the temperature load in relation to the upper surface of a plate covering the fire pond. In each case, methods of restoration of the damaged elements were proposed, and their application to engineering practice was described. The practical aspects of the conducted research and implemented interventions were indicated.
Highlights
At a time when effective analytical theories were not known, guidelines for determining safe sections of building elements were obtained from experimental studies [1,2]
Research on the actual condition of a structure made it possible to develop computational methods for the assessment of the load-bearing capacities of structural elements in order to improve the technology of material production and the technological processes of shaping and erecting structures
Regardless of the detected structural defects, exceptional loads, failure to comply with assembly tolerance in the case of prefabricated structures, or poor or inadequate quality of building materials, it is, in each of the analyzed cases, possible to diagnose the lack of proper supervision
Summary
At a time when effective analytical theories were not known, guidelines for determining safe sections of building elements were obtained from experimental studies [1,2]. Research on the actual condition of a structure made it possible to develop computational methods for the assessment of the load-bearing capacities of structural elements in order to improve the technology of material production and the technological processes of shaping and erecting structures. These results allowed for the avoidance of errors and flaws in the future, as long as they were correctly interpreted. The correctness of conclusions should be ensured by obtaining reliable data from many independent sources, using various techniques and tools Such sources may be inspections of the facility, archival documentation, or the monitoring of the deformation of structural elements. I.e., computationally confirmed, results of the conducted experiments makes it possible to carry out further tests by repeating proven procedures and standards in the case of similar building degradation events
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