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ISSN 1822-427X print
ISSN 1822-4288 online



"The Baltic Journal of Road and Bridge Engineering"
Vilnius: Technika, 2008, Vol III, No 3, p. 115–120.

Eugedijus Juozas Dulinskas, Viktor Gribniak, Gintaris Kaklauskas
Influence of Steam Curing on High-Cyclic Behaviour of Prestressed Concrete Bridge Elements
DOI: 10.3846/1822-427X.2008.3.115-120
The paper discusses the influence of curing conditions (steam and normal curing) on high-cyclic creep and fatigue strength of reinforced concrete bridge elements. The present analysis is based on experimental investigation performed by the first author: 46 plain concrete prisms and 13 prestressed concrete beams were subjected to the high-cycle loading (up to four million cycles). A comparative regression analysis of the fatigue strength of compressive concrete, in terms of a number of load cycles for given max stress level (S-N relationship) has been performed. The analysis has shown that curing conditions had no significant effect on the S-N relationship. On the contrary, curing conditions have significantly influenced the cyclic creep of compressive concrete. On average, the steam cured members had from 30 up to 80% larger deformations than the specimens cured under normal conditions. The difference was larger for higher numbers of loading cycles.
Keywords: curing conditions, fatigue testing, cyclic creep, prestressed concrete bridges.

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