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Bridges are and have been designed on lifetime basis, as given in standards applicable at the time of design. The design lifetime for newly designed bridges as given in Eurocodes is 100 years and according to the old Slovak standard it was 80 years only. The first generation of prestressed concrete bridges have been used in Slovakia (formerly part of Czechoslovakia) starting from 1950s, and thus,...
The paper deals with investigation of deviations of actual cambers from predicted values that were observed on precast bridge girders where prestress transfer is divided into two stages. The first part of prestressing is introduced by pre-tensioned strands only 18 hours after casting and the second part by three post-tensioned drapped tendons stressed one or two month later. The problem is analyzed...
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