Abstract:
This thesis work presents a numerical investigation on the Behaviors of Steel-Concrete Composite Beams under impact load by using non-linear finite element software LS-DYNA. The experimental result reported from the literature is used for validation analysis on LS-DYNA finite element software program. Further parametric studies are conducted to get insight into the behavior of composite beam under impact loading. The conducted parametric studies are single and double-headed shear stud arrangement, types of shear studs, and velocity as well mass of the impactor in the composite beam. A total of thirty-two analyses are conducted; four of them with different shear stud shapes, two of them with single and double stud arrangements for three velocities of the impactor and for two different masses of the impactor. Four different geometries of steel-concrete composite beams are also analyzed on this thesis.
The Finite element result indicated us when impact velocity rises from 3m/s - 5m/s and from 5m/s - 10m/s for conventional steel-concrete composite beam impact force increases by 45.7% and 61.1%. The same velocity variation for type-1 steel-concrete composite beam showed a rise of impact force by 45% and 63% and for type-2 steel-concrete composite beam the impact force increase by 43.5% and 58.5%. Increasing impactor mass from 400kg to 800kg in conventional steel-concrete composite beam leads to an increase of impact force in a range of 21-23.7%. Whereas, for type-1 and type-2 Steel-Concrete composite beam increment value ranges from 32.9 - 38.8% and 28.6 - 43.56% respectively. From four shear stud types used on this thesis T-connector and Headed shear stud type offered good slippage resistance than the other shear stud types.
