Eurocode 2 design of composite concrete

1. Genk, Belgium, December 9th, 2014Dordrecht, Netherlands , December 10th, 2014Eurocode 2 Design of Composite ConcreteStructuresAssoc. Prof. Jaroslav Navrtil, M.Sc., Ph.D. 2. IDEA RS - Literature 4Book on Prestressing by J. Navratil 100 eBTWhttp://eurocode2-naslagwerken-idea.eventbrite.com 3. 3Design of composite cross-sectionUltimate Limit States Flexure, Shear, Torsion Interaction of internal forces Fatigue Shear in composite joint 4. 4Shear in composite joint Standard EN approach Lever arm, factor b, shortcomings Alternative approach Comparative studyPrestressed composite bridge design Comparison and standard EN approach Effects of creep and shrinkage Comparison of EN 1992-1-1 and EN 1992-2Scope 5. 5Design of composite cross-sectionServiceability Limit States Stress limitation Decompression condition Crack width Brittle failure 6. 6Prefabricated composite structuresbecame very popular Reinforced/Prestressed beams withcomposite slab Floors composed of prefabricatedbeams made subsequently monolithicby cast-in-place concrete Filigran type floors Permanent shuttering floor systems Composite bridge beams 7. Different static systems during construction 7Construction stagesppopap8pw pAprpe pTpr pc pspeqpeg1to ta tg1 tq t8t Different moduli of elasticity Consecutive load application Change of boundary conditions Differential creep and shrinkage 8. 12354long-term effectsinitial stressesinipiniccomposite sectionvariable loadDifferent starting values of the strain and stress areused for each fibre of the cross-sectioneffectsMqNqULS - initial state method 8 9. ULS - initial state method 9Unbalanced stresses(a) (b) (c)c(