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02 Behavior of SteelLightweight Concrete Composite Beams with Partial Shear Interaction Fareed Hameed Majeed Civil Engineering Department, University of Basrah fhmfareed@gmail.com Abstract This experimental work along with an analytical analysis is investigated. The behavior of simply supported steel beams with lightweight and normal concrete slab that have the same compressive strength and slump was studied. Eight specimens tested under mid-point load and analysis by plastic analysis theory. Four of composite beams have a steel I-section beam with normal concrete slab and the other four with lightweight concrete slab. Different degrees of shear interaction were considered (100% to 40%). It was observed that there are no essential differences between the modes of failure that appeared in the tested composite beams with normal and lightweight concrete. Also, it was noted that there is a decrease in the initial stiffness and also in the ultimate strength of the composite beams when the concrete of the flanges for the tested specimens was replaced from normal to lightweight concrete for different degrees of shear connections. The analytical results for all tested beam specimens, except that with normal concrete and 100% degree of shear interaction, gave overestimate results compared with those of experimental results.

Behavior of Steel- Lightweight Concrete Composite Beams with Partial Shear Interaction