Slab and tube thickness effect on flexural behavior of lightweight concrete – filled steel tube composite beam

Experimental works were conducted in this study, the focus was on the flexural behavior for six beam specimens. Steel tubing filled with concrete and supported by a slab deck was employed. The flexural behavior of concrete-filled steel tube composite beams was investigated under a one-point monotonic loading test. Two specimens of push-out were tested to investigate the effect of the connector. Two types of concrete were used: lightweight for concrete-filled steel tube composite beam and normal reinforced concrete for a deck slab. Perfobond connectors were used to connect the steel tube and concrete deck slab. The flexural bending test was used to examine the behavior of specimens. The ultimate load, crack, load-deflection curve, and slippage at the end of the composite beam are all included in the testing data. The test results show that the increase in thickness of steel tubes and concrete compressive strength which filled steel tube leads to an increase in ultimate load. Slab thickness and increasing the main reinforcement of a concrete slab lead to improvements in the ultimate load and ductility of the concrete-filled steel tube composite beam.