Anomalous properties of steel of old railway bridges in the light of diagnostic tests
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Abstract
The procedure for assessing the properties of steel in exploited bridge structures is one of the most important issues in the comprehensive assessment of the load capacity and durability of bridges used for a longer period of time. The paper is an attempt to recapitulate conclusions from many years of research on these structures. Literature and own research have shown that many of these structures do not strictly transfer design loads, but safely transfer the actual loads occurring on a given railway line. The new rules for assessing such bridges will allow to estimate their operational usefulness despite the progressing material degradation. It is necessary to determine the safety factor, especially when it concerns several objects globally at the same time. The authors' dream is to comprehensively interpret Polish research and to develop an appropriate standard to estimate the real pragmatic loads.
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