Composite Beam Incorporating Cellular Steel Decking

by Hugh Robinson,

Serial Information: Journal of the Structural Division, 1969, Vol. 95, Issue 3, Pg. 355-380

Document Type: Journal Paper


Results of a test on a composite steel and concrete beam incorporating a cellular steel deck are reported. Good agreement between measured and computed values of strain and deflection is indicated prior to first yielding. The beam behaved in accordance with the elastic theory for composite beams with incomplete interaction. The load-slip characteristic for the end connections was determined from the beam test results. The maximum strength of a connection computed from the measured load and end slips in the elastic range has been used to estimate the ultimate strength of the beam. Elastic theory prediction of major breakdown of interaction under the load-points of a beam with symmetrical two point load system was confirmed in the test when the extreme fiber strains in the steel and concrete at the load points exceeded those at mid-span in the elastic range. At maximum load two discrete hinges formed at the load points. It is shown how efficiency factors for flexural stress and deflection can be derived.

Subject Headings: Load factors | Load tests | Maximum loads | Composite beams | Steel beams | Steel decks | Concrete beams | Elastic analysis

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