The composite concrete-steel girders have efficiently used material capabilities for simple span girders. For continuous composite girders, concrete slab over the interior supports will be under tension and consequently loses its contribution to the composite action. Typical design codes ignore the contribution of concrete slab at the negative moment region for continuous composite girders or consider the steel reinforcements of concrete slab to act compositely with the steel section. For both options, capacity at the negative moment region is greatly reduced.
Numerical investigation of ability of carbon fiber reinforced polymer (CFRP) sheets to maintain the steel-concrete composite action at the negative moment region is intended in this paper. A three dimensional nonlinear Finite element (FE) modelling is carried out in this study using commercial software ABAQUS. Four girders of different thicknesses of CFRP at the negative moment region are investigated in this study. CFRP sheet is bonded to the top of concrete slab at the negative moment region and extended for a certain development length. The composite girders are designed to be fully composite between concrete and steel beam by using of mechanical shear studs. Concrete damage plasticity is used for modeling concrete. Contact models are used to simulate the composite action between CFRP and concrete slab, and concrete slab and shear studs. The numerical results validated with experimental results and showed good agreement

Conference Title

3nd Conference on Smart Monitoring, Assessment and Rehabilitations of Civil Structures

Conference Country

Turkey

Conference Date

Sept. 7, 2016 - Sept. 9, 2016

Conference Sponsor

http://www.smar2015.org/

Additional Info

Conference Website