Abstract
This paper compares the effect of temperature changes on the superstructure of bridges, above all the effect of non-uniform temperature. Loadings according to standards ESN 73 6203, ENV 1991-1-5 and DIN 1072 are compared here. The paper shows a short summary of temperature loading according to each standard and shows the comparison of bending moments arisen from these temperature loadings on superstructure made from continuous girder from a steel-concrete box girder with a composite concrete slab. With respect to a variety of design processes, the comparison is made without any coefficient of loading, combination or material.
Highlights
This paper will compare the effects of temperature changes in bridge girders, above all the effect of non-uniform temperature distributions
As the bridge structure has the form of a continuous beam supported by fixed bearings on the two middle piers, the uniform temperature component causes axial displacements and produces a normal force accompanied by negligible bending moments only
The final effects from loading with maximum heating in the temperature gradient according to the ENV standard can, in some combinations, be higher than according to the other standards, though the effect is lower without the coefficients
Summary
This paper will compare the effects of temperature changes in bridge girders, above all the effect of non-uniform temperature distributions. The loadings recommended by standards ČSN 73 6203, ENV 1991-2-5 and DIN 1072 will be compared here. Due to the variety of design processes, the comparison will be made without any coefficient of loading, combination or material. The standard prescribes equal temperature changes for each type of structure. If this value cannot be set in any other way, the upper and lower boundary temperature is used other way. The value t f =10 °C can be used as the initial temperature for most structures
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