Differential temperature effect-steel stresses
Differential temperature effect-steel stresses
(OP)
The example in Hambly (Chapter 11) shows calculations to obtain the stress distribution across a concrete section from differential temperature effect. There is no memtion whether the presence of steel reinforcement is to be included or whether the effect of steel reinforcement has to be included in such an analysis. I am interested in estimating the steel stresses resulting from differential temperature effects.
Please advise.
Please advise.





RE: Differential temperature effect-steel stresses
RE: Differential temperature effect-steel stresses
The thermal analysis assumes that the coefficient of thermal expansion is the same for steel and concrete. That's only approximately true of course, but shrinkage strains in the concrete are usually very much greater than differential temperature strains, for concrete and steel at the same temperature. The analysis described in Hambly finds a resultant bending moment due to the differential strains across the section, which is applied to the composite section, so the resulting stresses in the reinforcement come out of that analysis.
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/